Sample records for palm mite raoiella

  1. Detection and Identification of the Red Palm mite Raoiella indica Hirst (Acari: Tenuipalpidae)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Major infestations of the Red Palm Mite, Raoiella indica Hirst, have been reported in almost all the Caribbean islands and Venezuela. Correct identification of the mite and host associations is essential for the management and biocontrol of this invasive mite pest. This paper provides information o...

  2. First report of the red palm mite, Raoiella indica Hirst (Acari: Tenuipalpidae), in Brazil.

    PubMed

    Navia, D; Marsaro, A L; da Silva, F R; Gondim, M G C; de Moraes, G J

    2011-01-01

    The presence of the red palm mite, Raoiella indica Hirst, is reported for the first time in Brazil. This invasive mite was found in July 2009 infesting coconut palms and bananas in urban areas of Boa Vista, State of Roraima, in northern Brazil. Comments on the possible pathways of R. indica into the country, present and potential impact of its introduction and mitigating measures to prevent or to delay the mite spread in Brazil are presented. PMID:21710040

  3. Chemical control of the red palm mite, Raoiella indica (Acari: Tenuipalpidae) in banana and coconut.

    PubMed

    Rodrigues, Jose Carlos Verle; Peńa, J E

    2012-08-01

    The red palm mite (RPM), Raoiella indica Hirst, is a predominant pest of coconuts, date palms and other palm species, as well as a major pest of bananas (Musa spp.) in different parts of the world. Recently, RPM dispersed throughout the Caribbean islands and has reached both the North and South American continents. The RPM introductions have caused severe damage to palm species, and bananas and plantains in the Caribbean region. The work presented herein is the result of several acaricide trials conducted in Puerto Rico and Florida on palms and bananas in order to provide chemical control alternatives to minimize the impact of this pest. Spiromesifen, dicofol and acequinocyl were effective in reducing the population of R. indica in coconut in Puerto Rico. Spray treatments with etoxanole, abamectin, pyridaben, milbemectin and sulfur showed mite control in Florida. In addition, the acaricides acequinocyl and spiromesifen were able to reduce the population of R. indica in banana trials. PMID:21983877

  4. A review of the natural enemies of the red palm mite, Raoiella indica (Acari: Tenuipalpidae).

    PubMed

    Carrillo, Daniel; Frank, J Howard; Rodrigues, Jose Carlos V; Peńa, Jorge E

    2012-08-01

    A review of all the available information about the natural enemies reported in association with the red palm mite, Raoiella indica is presented. Twenty-eight species of predatory arthropods, including mites and insects, have been reported in association with R. indica in Asia, Africa and the Neotropics. In addition, pathogenic fungi associated with R. indica in the Caribbean have been reported. The available literature indicates that each site has a different natural enemy complex with only one predator species, Amblyseius largoensis (Acari: Phytoseiidae), present in all the geographical areas. The phytoseiids, Amblyseius caudatus Berlese, Amblyseius channabasavanni Gupta and A. largoensis, were regarded as important natural enemies of R. indica, and their predatory efficiency was studied in some detail. Among the predatory insects the coccinellids Stethorus keralicus Kapur and Telsimia ephippiger Chapin were reported as major predators of R. indica. The known distribution, abundance and relative importance of each species reported in association with R. indica are discussed. PMID:21972084

  5. Spatial distributions of the red palm mite, Raoiella indica (Acari: Tenuipalpidae) on coconut and their implications for development of efficient sampling plans.

    PubMed

    Roda, A; Nachman, G; Hosein, F; Rodrigues, J C V; Peńa, J E

    2012-08-01

    The red palm mite (Raoiella indica), an invasive pest of coconut, entered the Western hemisphere in 2004, then rapidly spread through the Caribbean and into Florida, USA. Developing effective sampling methods may aid in the timely detection of the pest in a new area. Studies were conducted to provide and compare intra tree spatial distribution of red palm mite populations on coconut in two different geographical areas, Trinidad and Puerto Rico, recently invaded by the mite. The middle stratum of a palm hosted significantly more mites than fronds from the upper or lower canopy and fronds from the lower stratum, on average, had significantly fewer mites than the two other strata. The mite populations did not vary within a frond. Mite densities on the top section of the pinna had significantly lower mite densities than the two other sections, which were not significantly different from each other. In order to improve future sampling plans for the red palm mite, the data was used to estimate the variance components associated with the various levels of the hierarchical sampling design. Additionally, presence-absence data were used to investigate the probability of no mites being present in a pinna section randomly chosen from a frond inhabited by mites at a certain density. Our results show that the most precise density estimate at the plantation level is to sample one pinna section per tree from as many trees as possible. PMID:22402941

  6. First report of Raoiella indica Hirst (Acari: Tenuipalpidae) and its damage to coconut palms in Puerto Rico and Culebra Island

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This is the first report of the occurrence of the Red Palm mite Raoiella indica and its damage in Puerto Rico and Culebra island. Raoiella indica is a new invasive pest threatening ornamental palm, coconut, and banana plantations. The mite was observed in eastern Puerto Rico and in Culebra island ...

  7. Within-season dynamics of red palm mite (Raoiella indica) and phytoseiid predators on two host palm species in south-west India.

    PubMed

    Taylor, B; Rahman, P M; Murphy, S T; Sudheendrakumar, V V

    2012-08-01

    Field surveys were conducted monthly between December 2008 and July 2009 in Kerala, south-west India to compare the population dynamics of the red palm mite Raoiella indica (RPM) on two host plants Areca catechu and Cocos nucifera during one non-monsoon season when, in general, RPM populations increase. The aim was to examine the effects of host plant, host plant locality and the impact of climatic factors on RPM and related phytoseiid predators. There were significantly higher RPM densities on areca in peak season (May/June) compared to coconut; although significantly more coconut sites were infested with RPM than areca. Although no one climatic factor was significantly related to RPM numbers, interactions were found between temperature, humidity and rainfall and the partitioning of host plant locality showed that where conditions were warmer and drier, RPM densities were significantly higher. Specifically on coconut, there was a significant relation between RPM densities and the combined interaction between site temperature, site humidity and phytoseiid densities. There was a marked difference in the density of phytoseiids collected between areca and coconut palms, with significantly more on the latter, in several months. Amblyseius largoensis was the most commonly collected phytoseiid in association with RPM, although Amblyseius tamatavensis species group and Amblyseius largoensis species group were collected in association with RPM also. There was also evidence of a weak numerical response of the combined phytoseiid complex in relation to RPM density the previous month on coconut but this was not observed on areca. PMID:21915684

  8. Red Palm Mite Situation in the Caribbean and Florida

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The red palm mite (Raoiella indica Hirst Tenuipalpidae), a pest of coconuts and ornamental palms in Asia and Africa, was reported in the Caribbean in 2004. By 2008, it had spread to at least twelve islands, two counties in Florida and to Venezuela. Red palm mite causes yellowing and leaf necrosis wi...

  9. Molecular discrimination of phytoseiids associated with the red palm mite Raoiella indica (Acari: Tenuipalpidae) from Mauritius and South Florida.

    PubMed

    Bowman, Heidi M; Hoy, Marjorie A

    2012-08-01

    Phytoseiid populations imported from Mauritius for evaluation for a classical biological control program in Florida, USA, were morphologically identified as Amblyseius largoensis Muma, a species associated with the red palm mite in south Florida and the Caribbean. Bayesian analysis and sequence divergences of the mitochondrial 12S rRNA and nuclear Elongation factor--I alpha (EF-I?) genes and Neighbor-Joining analysis of High-fidelity-RAPD-PCR markers were used to discriminate between the south Florida and Mauritius populations. High-fidelity-RAPD-PCR markers in addition to Bayesian and sequence divergence analyses of the 12S rRNA sequences suggest that the Mauritius and south Florida populations are genetically different but whether these are species or population differences is unknown. The degenerate EF-I? primers used to survey the phytoseiids amplified two different elongation factor sequences with distinct amino acid translations, the putative EF-I? and an unknown elongation factor. Variability within the 12S gene was used to develop population-specific primers for identifying the Mauritius phytoseiids in the event they are released in south Florida. PMID:22527831

  10. Screening of plantain hybrids for resistance to Raoiella indica (Acari: Tenuipalpidae) and use of a systemic acaricide to control the mite

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Sixteen clones of plantain were screened for resistance to red palm mite (RPM), Raoiella indica Hirst. The plantain clones were established in 5kg pots with ten replicates. Mite infestation was carried out by introducing highly infested potted coconut palms between the plantain pots (1:10). Control ...

  11. Raoiella indica (Acari: Tenuipalpidae): an exploding mite pest in the neotropics.

    PubMed

    Kane, Ethan C; Ochoa, Ronald; Mathurin, Guy; Erbe, Eric F; Beard, Jennifer J

    2012-08-01

    Major infestations of the flat mite species Raoiella indica Hirst affecting bananas, palms and other ornamental plants have been reported from the Caribbean islands, Mexico, FL (USA), Venezuela, Colombia and Brazil. Specimens from these localities were examined using traditional light microscopy and low-temperature scanning electron microscopy techniques. While little is known about the biology of this mite, its recent appearance in the Americas in both commercial coconut and banana plantations has raised concerns about its economic impact as an invasive pest. PMID:22392436

  12. Geographic distribution and host plants of Raoiella indica and associated mite species in northern Venezuela.

    PubMed

    Vásquez, Carlos; de Moraes, Gilberto J

    2013-05-01

    The red palm mite (RPM), Raoiella indica Hirst (Acari: Tenuipalpidae), is an invasive pest in the New World, where it is currently considered a serious threat to coconut and banana crops. It was first reported from northern Venezuela in 2007. To determine its current distribution in this country, surveys were carried out from October 2008 to April 2010 on coconut (Cocos nucifera L.), banana (Musa spp.), ornamental plants and weeds in northern Venezuela. Higher population levels of RPM were registered on commercial coconut farms in Falcón and Sucre states but also on other plant species naturally growing along the coastal line in Anzoategui, Aragua, Carabobo, Monagas and Nueva Esparta states. Out of 34 botanical species evaluated, all RPM stages were observed only on eight arecaceous, one musaceous and one streliziaceous species, indicating that the pest developed and reproduced only on these plants. Mite specimens found on weeds were considered spurious events, as immature stages of the pest were never found on these. Amblyseius largoensis (Muma) (Acari: Phytoseiidae) was the most frequent predatory mite associated with RPM in all sampling sites. The results indicate that RPM has spread to extensive areas of northern Venezuela since its initial detection in Güiria, Sucre state. Considering the report of this pest mite in northern Brazil in the late 2009, additional samplings in southern Venezuela should be carried out, to evaluate the possible presence of RPM also in that region. PMID:23065034

  13. Raoiella indica Hirst (Acari: Tenuipalpidae): An island-hopping mite pest in the Caribbean

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Major infestations of the flat mite species Raoiella indica Hirst have been reported from the Caribbean islands of Dominica, Martinique, and Saint Lucia. Specimens from these localities were examined using traditional light microscopy and low-temperature scanning electron microscopy (LTSEM) techniqu...

  14. Effect of coconut palm proximities and Musa spp. germplasm resistance to colonization by Raoiella indica (Acari: Tenuipalpidae).

    PubMed

    Rodrigues, Jose Carlos Verle; Irish, Brian M

    2012-08-01

    Although coconut (Cocos nucifera L.) is the predominant host for Raoiella indica Hirst (Acari: Tenuipalpidae), false spider mite infestations do occur on bananas and plantains (Musa spp. Colla). Since its introduction, the banana and plantain industries have been negatively impacted to different degrees by R. indica infestation throughout the Caribbean. Genetic resistance in the host and the proximity of natural sources of mite infestation has been suggested as two of the main factors affecting R. indica densities in Musa spp. plantations. Greenhouse experiments were established to try to determine what effect coconut palm proximities and planting densities had on R. indica populations infesting Musa spp. plants. Trials were carried out using potted Musa spp. and coconut palms plants at two different ratios. In addition, fourteen Musa spp. hybrid accessions were evaluated for their susceptibility/resistance to colonization by R. indica populations. Differences were observed for mite population buildup for both the density and germplasm accession evaluations. These results have potential implications on how this important pest can be managed on essential agricultural commodities such as bananas and plantains. PMID:21915683

  15. Overview of a classical biological control project directed against the red palm mite in Florida.

    PubMed

    Hoy, Marjorie A

    2012-08-01

    Information is provided on the steps involved in classical biological control programs, with an outline of the steps achieved in the classical biological control of the red palm mite, Raoiella indica (Acari: Tenuipalpidae), in Florida. An overview is provided of the results and an accompanying paper by Bowman and Hoy (2012) describes the molecular analyses conducted to characterize phytoseiid predators of the red palm mite collected from Mauritius. The Mauritius phytoseiids were identified as Amblyseius largoensis, using morphological criteria, and compared to four populations of A. largoensis from Florida. The difficulties encountered in the systematics, rearing, and evaluation of the Mauritius phytoseiids are described. A method was tested for obtaining DNA from single mites without destroying the body so that voucher specimens can be maintained. Ultimately, the project was terminated due to constraints expected in obtaining permission to make releases. PMID:22456811

  16. Effect of coconut palm proximities and Musa spp. germplasm resistance to colonization by Raoiella indica (Acari: Tenuipalpidae)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Although coconut (Cocos nucifera L.) is the predominant host for Raoiella indica Hirst (Acari: Tenuipalpidae), false spider mite infestations do occur on bananas and plantains (Musa spp. Colla). Since its introduction, the banana and plantain industries have been negatively impacted to different deg...

  17. Phylogenetic investigation of the genus Raoiella (Prostigmata: Tenuipalpidae): Diversity, distribution, and world invasions

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The genus Raoiella is most well known because of the red palm mite, R. indica, a major pest of palms spreading aggressively throughout the Americas. Not much was known about the biology, geographic origins, or evolutionary history of the genus when R. indica emerged as a major invasive pest. This pa...

  18. First report of Raoiella indica Hirst (Acari: Tenuipalpidae) in South America.

    PubMed

    Vásquez, Carlos; Quirós de G, Magally; Aponte, Orlando; Sandoval, D María F

    2008-01-01

    The presence of the red palm mite, Raoiella indica Hirst is recorded for the first time in South America. High populations and severe damages caused by this new invasive mite were found on coconut and banana leaves in Sucre (10 degrees 27' 47' N and 64 degrees 10' 38' W) and Monagas (9 masculine46'60' N and 63 masculine12'0' W) states in northeastern Venezuela. PMID:19169566

  19. Potential geographical distribution of the red palm mite in South America.

    PubMed

    Amaro, George; de Morais, Elisangela Gomes Fidelis

    2013-07-01

    Among pests that have recently been introduced into the Americas, the red palm mite, Raoiella indica Hirst (Prostigmata: Tenuipalpidae), is the most invasive. This mite has spread rapidly to several Caribbean countries, United States of America, Mexico, Venezuela, Colombia and Brazil. The potential dispersion of R. indica to other regions of South America could seriously impact the cultivation of coconuts, bananas, exotic and native palms and tropical flowers such as the Heliconiaceae. To facilitate the development of efficacious R. indica management techniques such as the adoption of phytosanitary measures to prevent or delay the dispersion of this pest, the objective of this paper was to estimate the potential geographical distribution of R. indica in South America using a maximum entropy model. The R. indica occurrence data used in this model were obtained from extant literature, online databases and field sampling data. The model predicted potential suitable areas for R. indica in northern Colombia, central and northern Venezuela, Guyana, Suriname, east French Guiana and many parts of Brazil, including Roraima, the eastern Amazonas, northern Pará, Amapá and the coastal zones, from Pará to north of Rio de Janeiro. These results indicate the potential for significant R. indica related economic and social impacts in all of these countries, particularly in Brazil, because the suitable habitat regions overlap with agricultural areas for R. indica host plants such as coconuts and bananas. PMID:23297112

  20. Phylogenetic investigation of the genus Raoiella (Prostigmata: Tenuipalpidae): diversity, distribution, and world invasions.

    PubMed

    Dowling, A P G; Ochoa, R; Beard, J J; Welbourn, W C; Ueckermann, E A

    2012-08-01

    The genus Raoiella is best known because of the red palm mite, R. indica, a major pest of palms spreading aggressively throughout the Americas. Not much was known about the biology, geographic origins, or evolutionary history of the genus when R. indica emerged as a major invasive pest. This paper attempts to address some of the basic historical questions regarding the palm mite as well as the genus. Molecular characters from COI and 28S regions were used to produce a phylogenetic hypothesis for the genus in an effort to understand its geographic origin. It also uses COI barcode data to delimit several potentially new species discovered by the authors in Australia. Results show a basal split between R. indica and all other Raoiella species, which indicates Africa or the Middle East as the most probable origin of the genus. Additionally, COI data suggests that at least eight new species are represented among the 20 Australian populations included in this study. PMID:21913003

  1. Life cycle of Raoiella indica (Acari: Tenuipalpidae) on ornamental plants, mostly Arecaceae.

    PubMed

    Vásquez, C; Colmenárez, Y; de Moraes, G J

    2015-02-01

    The red palm mite, Raoiella indica Hirst, has been primarily found associated with coconut and musaceous plants in the New World. However, it has also been recorded on several other palms, heliconiaceous and zingiberaceous species. This study was conducted to evaluate the suitability of different botanical families on which R. indica has been collected in the field and of arecaceous plants of the natural vegetation of the neotropics. In total, ten species of Arecaceae as well as Heliconia psittacorum [Heliconiaceae] and Alpinia purpurata [Zingiberacae] were evaluated, using coconut as a control. The study was carried out under controlled conditions (29 ± 0.5 °C, 60 ± 10% RH and photoperiod 12 h of light). Raoiella indica was able to complete immature development only on coconut, Adonidia merrillii, Ptychosperma macarthurii, H. psittacorum and A. purpurata. Duration of the immature phase (egg-adult) ranged between 21.5 days on coconut to 34.1 days on A. purpurata. Longevity was at least 50% greater and oviposition at least 38% higher on coconut than on other plants. Intrinsic rate of increase (rm) was higher on coconut (0.166) and A. merrillii (0.042), but negative on the other two plant species. Raoiella indica could not reach adulthood on any of the other ten arecaceous species considered in the study. The results suggested R. indica to be a threat to A. merrillii in addition to coconut, but not to other evaluated plants. However, complementary studies should be conducted to investigate whether the experimental procedures adopted in this study could not have prevented the mite from a better performance than it could have been under field conditions, especially in relation to Mauritia flexuosa, one of the dominant arecaceous plants in South America. PMID:25342244

  2. Development and reproduction of Amblyseius largoensis (Acari: Phytoseiidae) feeding on pollen, Raoiella indica (Acari: Tenuipalpidae), and other microarthropods inhabiting coconuts in Florida, USA.

    PubMed

    Carrillo, Daniel; Peńa, Jorge E; Hoy, Marjorie A; Frank, J Howard

    2010-10-01

    The red palm mite, Raoiella indica (Acari: Tenuipalpidae), is an important pest of palms (Arecaceae) and other species within the Zingiberaceae, Musaceae and Strelitziaceae families. Raoiella indica was discovered in the USA (Palm Beach and Broward counties, Florida) late in 2007, and it subsequently spread to other Florida counties. The predatory mite Amblyseius largoensis (Acari: Phytoseiidae) has been found associated with R. indica in Florida. In order to verify whether A. largoensis can develop and reproduce when feeding exclusively on R. indica, the biology of this predator was evaluated on various food sources, including R. indica. Five diets [R. indica, Tetranychus gloveri Aonidiella orientalis, Nipaecocus nipae, oak (Quercus virginiana) pollen] and a no-food control were tested to determine the predators' development, survivorship, oviposition rate, sex ratio and longevity at 26.5 +/- 1 degrees C, 70 +/- 5% RH and a 12:12 L:D photophase. Amblyseius largoensis was able to complete its life cycle and reproduce when fed exclusively on R. indica. The development of immature stages of A. largoensis was faster and fecundity and survivorship were higher when fed on R. indica or T. gloveri compared to the other food sources. The intrinsic rate of natural increase of A. largoensis was significantly higher when fed on R. indica than on other diets. These results suggest that, despite earlier assessments, A. largoensis can play a role in controlling R. indica. PMID:20333446

  3. Biological control of the red palm weevil, Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae) by the parasitoid mite, Rhynchopolipus rhynchophori (Ewing) (Acarina: Podapolipidae).

    PubMed

    Abdullah, Mohammed A R

    2009-08-01

    The parasitoid mite, Rhynchopolipus rhynchophori was released against the red palm weevil Rhynchophorus ferrugineus stages. Released of this mite applied at four levels of treatment, A (30 parasitic mites: 1 prey), B (60 parasitic mites: 1 prey), C (90 parasitic mites: 1 prey) and D (120 parasitic mites: 1 prey). The parasitoid mites successfully suppressed population density of the red palm weevil, R. ferrugineus stages within two weeks. The killing of different developmental stages of the red palm is due to sucking their body fluid by the parasitoid mite, Rh. rhynchphori. But, the pupal weight was significantly (P < 0.5) decreased by increasing numbers of parasitoid mites at the different treatment levels. PMID:19795774

  4. Host plant range of Raoiella indica (Acari: Tenuipalpidae) in areas of invasion of the New World.

    PubMed

    Carrillo, Daniel; Amalin, Divina; Hosein, Farzan; Roda, Amy; Duncan, Rita E; Peńa, Jorge E

    2012-08-01

    Raoiella indica has spread rapidly through the Neotropical region where the mite damages economically and ecologically important plants. Three studies were conducted to determine the host plant range of R. indica, using the presence of colonies containing all life stages as an indicator of reproductive suitability. Periodic surveys at the Fairchild Tropical Botanic Garden (Miami Dade County, FL, USA) and the Royal Botanical Gardens (Port of Spain, Trinidad and Tobago) identified 27 new reproductive host plants. The reproductive suitability of two dicotyledonous species and three native Florida palm species was examined. An updated list of reproductive host plants of R. indica is presented. All reported reproductive hosts (91 plant species) of R. indica are monocots from the orders Arecales (Arecaceae), Zingiberales (Heliconiaceae, Musaceae, Strelitziaceae, Zingiberaceae) and Pandanales (Pandanaceae). Most are palms of the family Arecaceae that originated in areas of the Eastern Hemisphere; about one fourth of the reported hosts are native to the New World and could be considered new host associations of R. indica. Six years after the initial detection in the Caribbean, R. indica has expanded its host plant range. Here we report 27 new reproductive host of R. indica that represent 30% of increase on previous host plant records. As this mite continues spreading in the Neotropical region a great diversity of plants is potentially affected. PMID:21915682

  5. Toxicity of acaricides to Raoiella indica and their selectivity for its predator, Amblyseius largoensis (Acari: Tenuipalpidae: Phytoseiidae).

    PubMed

    de Assis, Carla P O; de Morais, Elisângela G F; Gondim, Manoel G C

    2013-07-01

    Raoiella indica Hirst (Acari: Tenuipalpidae) is considered a pest of coconut palm in Asia and the Middle East. This mite was recently introduced in the Americas, where it spread to several countries and expanded its range of hosts, causing heavy losses to coconut and banana production. The phytoseiid mite Amblyseius largoensis (Muma) is one of the predators most often encountered in coconut palms. Because the current prospects for the control of R. indica in the New World indicate the use of acaricides and the management of their natural enemies, the objective of this study was to evaluate the toxicity of selected acaricides to R. indica and the selectivity (i.e., toxicity to the predator relative to toxicity to the prey) for A. largoensis. Assays were performed by the immersion of banana leaf discs in acaricide solutions, followed by the placing of adult females of the pest or predator on the discs. Mortality of the mites was evaluated after 24 h, and the data obtained were subjected to probit analysis. Abamectin, fenpyroximate, milbemectin and spirodiclofen were the products most toxic to R. indica adults, whereas fenpyroximate and spirodiclofen were the most selective for A. largoensis. PMID:23229493

  6. Prey-stage preferences and functional and numerical responses of Amblyseius largoensis (Acari: Phytoseiidae) to Raoiella indica (Acari: Tenuipalpidae).

    PubMed

    Carrillo, Daniel; Peńa, Jorge E

    2012-08-01

    Raoiella indica Hirst (Acari: Tenuipalpidae) is a phytophagous mite that recently invaded the Western Hemisphere. This mite is a multivoltine and gregarious species that can reach very high population densities and cause significant damage to various palm species (Arecaceae). The predatory mite Amblyseius largoensis (Muma) (Acari: Phytoseiidae) has been found associated with R. indica in Florida. This study evaluated A. largoensis for potential to control R. indica by (1) determining predator preferences among developmental stages of R. indica, and (2) estimating predator functional and numerical responses to varying densities of its most preferred prey-stage. Under no-choice conditions A. largoensis consumed significantly more eggs than other stages of R. indica. In choice tests A. largoensis showed a significant preference for R. indica eggs over all other prey stages. Amblyseius largoensis displayed a type II functional response showing an increase in number of prey killed with an increase in prey population density. Consumption of prey stabilized at approximately 45 eggs/day, the level at which oviposition by the predator was maximized (2.36 ± 0.11 eggs/day; mean ± SEM). Results of this study suggest that A. largoensis can play a role in controlling R. indica populations, particularly when prey densities are low. PMID:21915681

  7. Comparison of two populations of the pantropical predator Amblyseius largoensis (Acari: Phytoseiidae) for biological control of Raoiella indica (Acari: Tenuipalpidae).

    PubMed

    Domingos, Cleiton A; Oliveira, Leandro O; de Morais, Elisângela G F; Navia, Denise; de Moraes, Gilberto J; Gondim, Manoel G C

    2013-05-01

    The red palm mite, Raoiella indica Hirst (Acari: Tenuipalpidae), was recently introduced in the Americas. It spread quickly throughout coconut palm growing areas, expanding considerably its host range. The invasion of this species has caused high economic impact in several countries. In Brazil, extensive areas are expected to be affected. For logistical reasons and other concerns, chemical control does not seem desirable for the control of this pest in most Latin American countries. Biological control of R. indica by introducing exotic natural enemies seems to be an important control measure to be considered. Surveys in many countries have shown that Amblyseius largoensis (Muma) (Acari: Phytoseiidae) is a very common predator on coconut palms. This study compared the biology of a population of A. largoensis found for a long time in association with R. indica in La Reunion Island (Indian Ocean) with a population from Roraima State (northern Brazil), where R. indica was first found about two and a half years ago. No significant differences were observed between populations in relation to the duration of different immature stages or total survivorship. However, the oviposition period, prey consumption and net reproductive rate were significantly higher for the La Reunion population, warranting further investigation to determine whether that population should be released in Roraima to control the pest. PMID:23100107

  8. Testing prey DNA fingerprinting on Amblyseius largoensis (Acari: Phytoseiidae) predation of Raoiella indica (Acari: Tenuipalpidae).

    PubMed

    Rivera-Rivera, Carlos; Galindo-Cardona, Alberto; Rodrigues, Jose Carlos Verle

    2012-08-01

    Molecular detection of predation by identifying prey markers in the digestive tract of predators has developed into a powerful tool to assess predator-prey systems in which diet identification is too time consuming or impossible. Here we explore its utility for detecting predation of the pest mite Raoiella indica Hirst by the predatory mite Amblyseius largoensis Muma, taking advantage of the color the predator acquires after eating this mite to cross-reference our results. For this, a ~410 bp segment of the cytochrome c oxidase subunit I (COI) mitochondrial gene marker specific for the subfamily Tetranychoidea was used. Amblyseius largoensis that had recently eaten were collected from greenhouse colonies containing both mites, and isolated from any other food source. Predator mites were taken for fingerprinting at 24, 48, 72 and 96 h of starving after collection, and the same process was repeated a second time, offering pollen as an alternative food source to see whether detection changed. Lastly, a sampling trial was conducted in the greenhouse, in which mites were collected regardless of their color and frozen immediately for fingerprinting. Raoiella indica DNA was detected for 48 h on starving predators, and for 96 h on those who had eaten pollen. The segment was detected in 26 % of the samples collected on the trial. This technique needs refinement specific for this system, but the results obtained here confirm that it could turn into a very useful tool for assessing aspects of this predator-prey system. PMID:22476445

  9. HOUSEHOLD HAZARDOUS WASTE CHARACTERIZATION STUDY FOR PALM BEACH COUNTY, FLORIDA: A MITE PROGRAM EVALUATION

    EPA Science Inventory

    The objectives of the Household hazardous Waste Characterization Study (the HHW Study) were to quantify the annual household hazardous waste (HHW) tonnages disposed in Palm Beach County, Florida's (the county) residential solid waste (characterized in this study as municipal soli...

  10. HOUSEHOLD HAZARDOUS WASTE CHARACTERIZATION STUDY FOR PALM BEACH COUNTY, FLORIDA - A MITE PROGRAM EVALUATION

    EPA Science Inventory

    The objectives of the Household Hazardous Waste Characterization Study (the HHW Study) were to: 1) Quantity the annual household hazardous waste (HHW) tonnages disposed in Palm Beach County Florida?s (the County) residential solid waste (characterized in this study as municipal s...

  11. External mouthpart morphology in the Tenuipalpidae (Tetranychoidea): Raoiella a case study.

    PubMed

    Beard, J J; Ochoa, R; Bauchan, G R; Welbourn, W C; Pooley, C; Dowling, A P G

    2012-08-01

    The use of low-temperature scanning electron microscopy (LTSEM) to study external mouthpart morphology in the Tenuipalpidae, in particular the genus Raoiella, has brought some aspects of the mechanics of feeding in this group into question. In addition, an LTSEM study on the specialized feeding behaviour of Raoiella indica Hirst (Tetranychoidea: Tenuipalpidae) revealed host plant use in this species could be affected by stomatal complex morphology. PMID:22415242

  12. Mite (Arthropoda: Acari) Associates of palms (Arecaceae) in Brazil: VI. New genera and new species of Eriophyidae and Phytoptidae (Prostigmata: Eriophyoidea)

    Microsoft Academic Search

    Denise Navia; Carlos H. W. Flechtmann

    2002-01-01

    Three new genera and ten new species of Eriophyoidea associated with palm trees (Arecaceae) are illustrated and described from Brazil. Two new genera and seven new species are in the family Eriophyidae - Aceria gymnoscutan. sp. from Syagrus flexuosa and Syagrus cocoides; Aceria biornatan. sp. from Acrocomia aculeata; Aceria translinean. sp. from Syagrus romanzoffiana and Attalea dubia; Proartacris longiorn. sp.

  13. Herbivore exploits chink in armor of host

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Mites in the genus Raoiella Hirst are obligate plant parasites that feed via stylet-like mouthparts adapted to pierce plant tissues. A species of particular interest in this genus, the red palm mite, R. indica Hirst, is currently spreading aggressively throughout the Americas on species of palm (Ar...

  14. Mite immunotherapy

    Microsoft Academic Search

    Enrique Fernández-Caldas; Victor Iraola; Manuel Boquete; Antonio Nieto; Miguel Casanovas

    2006-01-01

    Dermatophagoides pteronyssinus and D. farinae are the most common house dust mites and are among the most common sources of indoor allergens worldwide. These species are\\u000a very common in humid regions, where most allergic individuals are sensitized to house dust mites. Specific immunotherapy with\\u000a mite extracts has demonstrated clinical benefits in several doubleblind, placebo-controlled trials that are included in recent

  15. Demodex mites.

    PubMed

    Elston, Carly A; Elston, Dirk M

    2014-01-01

    Demodex mites are normal inhabitants of human hair follicles. D folliculorum is found predominantly in the follicular infundibulum of facial skin and is typically present in small groups. D brevis, the smaller of the two species, predominates on the trunk, typically as solitarily mites within the sebaceous glands and ducts. In a wide variety of animals, Demodex mites are recognized as a cause of mange. The role of Demodex mites as agents of human disease has been more controversial, but evidence favors their involvement in acneiform eruptions, folliculitis, and a range of eruptions in immunosuppressed patients. PMID:25441466

  16. Harvestman and mites

    NSDL National Science Digital Library

    N/A N/A (None; )

    2005-09-17

    Some mites use harvestmen for transportation only, while others use the harvestman as a food source. If the mites are feeding on the harvestman, this is a parasitic relationship because the mites gain food while the harvestman is harmed.

  17. DATE PALM

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This book chapter reviews date palm biology and cultivation. Date palm (Phoenix dactylifera L.) is one of the oldest fruit crops grown in the arid regions of the Arabian Peninsula, North Africa, and the Middle East. The exact origin of the date palm is unknown but most probably the area of origin w...

  18. Dust mite (image)

    MedlinePLUS

    This is a magnified photograph of a dust mite. Mites are carriers (vectors) of many important diseases including typhus (scrub and murine) and rickettsialpox. (Image courtesy of the Centers for Disease ...

  19. Host finding behaviour of the coconut mite Aceria guerreronis.

    PubMed

    Melo, J W S; Lima, D B; Sabelis, M W; Pallini, A; Gondim, M G C

    2014-12-01

    For the coconut mite, Aceria guerreronis Keifer, its host plant, the coconut palm, is not merely a source of food, but more generally a habitat to live in for several generations. For these minute organisms, finding a new plant is difficult and risky, especially because their main mode of dispersal is passive drifting with the wind and because they are highly specialized on their host plant. Consequently, the probability of landing on a suitable host is very low, let alone to land in their specific microhabitat within the host. How coconut mites manage to find their microhabitat within a host plant is still underexplored. We tested the hypothesis that they use volatile chemical information emanating from the plant to find a specific site within their host plants and/or use non-volatile plant chemicals to stay at a profitable site on the plant. This was investigated in a Y-tube olfactometer (i.e. under conditions of a directed wind flow) and on cross-shaped arenas (i.e. under conditions of turbulent air) that either allowed contact with odour sources or not. The mites had to choose between odours from specific parts (leaflet, spikelet or fruit) of a non-infested coconut plant and clean air as the alternative. In the olfactometer experiments, no mites were found to reach the upwind end of the Y-tube: <5 % of the mites were able to pass the bifurcation of the "Y". On the cross-shaped arenas, however, a large number of coconut mites was found only when the arm of the arena contained discs of fruit epidermis and contact with these discs was allowed. The results suggest that coconut mites on palm trees are not attracted to specific sites on the plant by volatile plant chemicals, but that they arrested once they contact the substrate of specific sites. Possibly, they perceive non-volatile chemicals, but these remain to be identified. PMID:25033768

  20. Mites and Wee Beasties.

    ERIC Educational Resources Information Center

    Reed, George H., Jr.

    1978-01-01

    A review is made of public health aspects of some arthropods that might be seen on a college or university campus. The diseases and infestations caused by mites, lice, bed bugs, fleas, and ticks are discussed. (JMF)

  1. Behaviour of coconut mites preceding take-off to passive aerial dispersal.

    PubMed

    Melo, J W S; Lima, D B; Sabelis, M W; Pallini, A; Gondim, M G C

    2014-12-01

    For more than three decades the coconut mite Aceria guerreronis Keifer is one of the most important pests of coconut palms and has recently spread to many coconut production areas worldwide. Colonization of coconut palms is thought to arise from mites dispersing aerially after take-off from other plants within the same plantation or other plantations. The underlying dispersal behaviour of the mite at take-off, in the airborne state and after landing is largely unknown and this is essential to understand how they spread from tree to tree. In this article we studied whether take-off to aerial dispersal of coconut mites is preceded by characteristic behaviour, whether there is a correlation between the body position preceding aerial dispersal and the direction of the wind, and whether the substrate (outer surface of coconut bracts or epidermis) and the wind speed matter to the decision to take-off. We found that take-off can sometimes be preceded by a raised body stance, but more frequently take-off occurs while the mite is walking or resting on its substrate. Coconut mites that become airborne assumed a body stance that had no relation to the wind direction. Take-off was suppressed on a substrate providing food to coconut mites, but occurred significantly more frequently on the outer surface of coconut bracts than on the surface of the fruit. For both substrates, take-off frequency increased with wind speed. We conclude that coconut mites have at least some degree of control over take-off for aerial dispersal and that there is as yet no reason to infer that a raised body stance is necessary to become airborne. PMID:25033769

  2. Fowl Mite Management In Breeders

    Microsoft Academic Search

    Mike Stringham

    Three species of fowl mite are recurring pests of commercial breeders and layers. The chicken mite or red poultry mite (Dermanyssus gallinae) is an ectoparasite that remains hidden in the cracks and crevices of a poultry house during the day and comes out to feed on birds at night. Owing to its ability to survive for long periods without feeding

  3. Dermatoses associated with mites other than Sarcoptes.

    PubMed

    Ken, Kimberly M; Shockman, Solomon C; Sirichotiratana, Melissa; Lent, Megan P; Wilson, Morgan L

    2014-09-01

    Mites are arthropods of the subclass Acari (Acarina). Although Sarcoptes is the mite most commonly recognized as a cause of human skin disease in the United States, numerous other mite-associated dermatoses have been described, and merit familiarity on the part of physicians treating skin disease. This review discusses several non-scabies mites and their associated diseases, including Demodex, chiggers, Cheyletiella, bird mites, grain itch, oak leaf itch, grocer's itch, tropical rat mite, snake mite, and Psoroptes. PMID:25577848

  4. Integrated palm oil processing

    SciTech Connect

    Compere, A.L.; Googin, J.M.; Griffith, W.L.

    1983-12-01

    Tree palms are a promising source of fuel extenders and substitutes. They are perennials which bear oil for a period of two to three decades after a roughly four year preliminary growth period. Because palms are an important crop in many areas of Asia, Africa, and South America, considerable attention has been given to palm genetic improvement, with the result that tree palms are one of the most efficient energy crops, providing much better solar energy capture than, for example, sugar cane and cassava. Tree palms are particularly attractive in areas where more conventional farming would pose a significant threat of laterization or cause major ecological problems. Technology for palm oil production, including harvest, tree management, and oil pressing are generally suited to village or plantation use, and, for the most part, have been directed toward supplying process energy through the combustion of process waste products, such as palm fruit residue and palm bunch fibers.

  5. [House dust mite allergy].

    PubMed

    Carrard, A; Pichler, C

    2012-04-01

    House dust mites can be found all over the world where human beings live independent from the climate. Proteins from the gastrointestinal tract- almost all known as enzymes - are the allergens which induce chronic allergic diseases. The inhalation of small amounts of allergens on a regular base all night leads to a slow beginning of the disease with chronically stuffed nose and an exercise induced asthma which later on persists. House dust mites grow well in a humid climate - this can be in well isolated dwellings or in the tropical climate - and nourish from human skin dander. Scales are found in mattresses, upholstered furniture and carpets. The clinical picture with slowly aggravating complaints leads quite often to a delayed diagnosis, which is accidently done on the occasion of a wider spectrum of allergy skin testing. The beginning of a medical therapy with topical steroids as nasal spray or inhalation leads to a fast relief of the complaints. Although discussed in extensive controversies in the literature - at least in Switzerland with the cold winter and dry climate - the recommendation of house dust mite avoidance measures is given to patients with good clinical results. The frequent ventilation of the dwelling with cold air in winter time cause a lower indoor humidity. Covering encasings on mattresses, pillow, and duvets reduces the possibility of chronic contact with mite allergens as well as the weekly changing the bed linen. Another option of therapy is the specific immunotherapy with extracts of house dust mites showing good results in children and adults. Using recombinant allergens will show a better quality in diagnostic as well as in therapeutic specific immunotherapy. PMID:22477664

  6. Integrated palm oil processing

    SciTech Connect

    Compere, A.L.; Griffith, W.L.; Googin, J.M.

    1983-01-01

    Tree palms are a promising source of fuel extenders and substitutes. They are perennials which bear oil for a period of two to three decades after a roughly four year preliminary growth period. Tree palms are now one of the most efficient energy crops: the best modern varieties can provide up to 6 tonnes per hectare per year of mesocarp and kernal oils. Palms are particularly attractive in areas where more conventional farming would pose a significant threat of laterization of cause major ecological problems. Technology for palm oil production is can range between village level manual operations and highly industrialized mills. Process energy is often supplied by combustion of byproducts. Although palm oil is a good energy crop, its physical and combustion properties preclude most use in conventional diesel engines, although palm oil could be directly blended with residual fuel oils for use in some large engines. At present, two uses for palm oil as a diesel fuel extender or substitute appear attractive: microemulsion blends using palm soapstock and monoesters produced by exchanging small alcohols for the glycerol in triglycerides. The amount of alcohols required for conversion of a substantial fraction of palm oil or palm oil soapstock to fuel extenders or substitutes is proportionately small, and, to a major extent, can be supplied by palm processing waste materials. Fermentation and gasification produced alcohols in the one to four carbon range are suitable for use in formulating palm oil based fuels. On a stoichiometric basis, it appears that the value of the palm oil and alcohols are very close to their value as export items. Use of these palm oil fuels could help to decrease balance of payments problems for developing countries, as well as provide a secure market for agricultural products and improved rural employment.

  7. Demodex mites: facts and controversies.

    PubMed

    Elston, Dirk M

    2010-01-01

    Because Demodex mites are ubiquitous, their potential as human pathogens has often been ignored. This contribution focuses on the growing body of evidence linking Demodex mites with various skin disorders. Histologically, spongiosis and lymphoid inflammation are regularly seen in follicles containing Demodex mites. In animals, they are well established as a cause of mange, and a human counterpart-demodectic alopecia-appears to exist. There is also a statistical association between Demodex mite density and rosacea, facial itching, and chronic blepharitis. Papulovesicular rosacealike lesions and spiny blepharitis often respond to agents that reduce Demodex numbers. Although these observations are not sufficient to fulfill Koch's postulates, Koch's postulates are also not fulfilled for the association between brown recluse spiders and dermal necrosis or the association between streptococci and guttate psoriasis. The evidence linking Demodex mites to human disease has implications regarding treatment. PMID:20797509

  8. Dust Mites in the Home

    MedlinePLUS

    ... furniture are great places for them to live. Cleaning each one of these places can make a ... bedroom should have a hardwood, tile or linoleum floor instead of carpet. Dust mites can grow rapidly ...

  9. Biology, ecology, and prevalence of dust mites.

    PubMed

    Arlian, Larry G; Morgan, Marjorie S

    2003-08-01

    The house dust mites D. farinae, D. pteronyssinus, and E. maynei are sources of multiple potent allergens in the indoor environment. They are common inhabitants in homes worldwide. Many biologically significant studies have revealed how well adapted these mites are to the microhabitats in homes. Ambient RH is a key factor in determining where these mites are found. Many aspects of the biology of house dust mites are not understood. A greater understanding of the biology of dust mites may reveal new strategies for controlling dust mites and their allergens in homes. PMID:14524385

  10. Dust mite allergens: ecology and distribution.

    PubMed

    Arlian, Larry G; Morgan, Marjorie S; Neal, Jacqueline S

    2002-09-01

    The most important allergy-causing mites found in homes worldwide are the house dust mites Dermatophagoides farinae, D. pteronyssinus, Euroglyphus maynei, and the storage mite Blomia tropicalis. Most homes contain multiple species. The most prevalent mite species and allergen in homes differ geographically, between homes within a geographical region, and among areas within a home. Therefore, it is important to know which mite species are present in a geographical area when performing diagnostic testing and prescribing immunotherapy. The key factor that influences mite survival and prevalence is relative humidity. Mites are present in homes in humid geographical areas and are rare or absent in drier climates unless humidity is artificially raised. Generally speaking, dust mite allergen levels are low in public buildings and transportation compared to levels in homes. PMID:12165207

  11. Fractionation of palm oil

    Microsoft Academic Search

    E. Deffense

    1985-01-01

    Because of its fatty acid composition, which includes 50% saturated and 50% unsaturated fatty acids, palm oil can readily\\u000a be fractionated, i.e. partially crystallized and separated into a high melting fraction or stearin and a low melting fraction\\u000a or olein.\\u000a \\u000a Three main commercial processes for fractionating palm oil are in use: the fast dry process, the slow dry process and

  12. House-dust-mite allergens: A review

    Microsoft Academic Search

    Larry G. Arlian

    1991-01-01

    The house-dust mites,Dermatophagoides farinae, D. pheronyssinus andEuroglyphus maynei are cosmopolitan inhabitants of the homes of humans worldwide. These mites are the sources of multiple potent allergens that trigger allergic reactions in house-dust-mite-sensitive individuals. Many laboratories using widely varied mite materials and allergic sera, and biochemical and immunological assays, have isolated and characterized, to varying degrees, some of the allergens produced

  13. Flat mites of the world - Edition 2

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The Flat Mites of the World has an interactive key, fact sheets, descriptions, and images to aid in the identification of flat mites (Acari: Trombidiformes: Tetranychoidea: Tenuipalpidae) worldwide. The tool will help identify 36 genera of flat mites, including specific diagnostics for 13 species of...

  14. Polymorphism of palm oil and palm oil products

    Microsoft Academic Search

    Peck Hong Yap; J. M. de Man; L. de Man

    1989-01-01

    Palm oil, palm stearin, hydrogenated palm oil (IV 27.5) and hydrogenated palm olein (IV 28) were crystallized at 5?C, temperature\\u000a cycled between 5 and 20?C, and kept isothermally at 5?C for 36 days. The polymorphic state of the fats was monitored by X-ray\\u000a diffraction analysis. Soft laser scanning of X-ray films was used to establish the increase in? crystal content.

  15. Human Demodex Mite: The Versatile Mite of Dermatological Importance

    PubMed Central

    Rather, Parvaiz Anwar; Hassan, Iffat

    2014-01-01

    Demodex mite is an obligate human ecto-parasite found in or near the pilo-sebaceous units. Demodex folliculorum and Demodex brevis are two species typically found on humans. Demodex infestation usually remains asymptomatic and may have a pathogenic role only when present in high densities and also because of immune imbalance. All cutaneous diseases caused by Demodex mites are clubbed under the term demodicosis or demodicidosis, which can be an etiological factor of or resemble a variety of dermatoses. Therefore, a high index of clinical suspicion about the etiological role of Demodex in various dermatoses can help in early diagnosis and appropriate, timely, and cost effective management. PMID:24470662

  16. Human demodex mite: the versatile mite of dermatological importance.

    PubMed

    Rather, Parvaiz Anwar; Hassan, Iffat

    2014-01-01

    Demodex mite is an obligate human ecto-parasite found in or near the pilo-sebaceous units. Demodex folliculorum and Demodex brevis are two species typically found on humans. Demodex infestation usually remains asymptomatic and may have a pathogenic role only when present in high densities and also because of immune imbalance. All cutaneous diseases caused by Demodex mites are clubbed under the term demodicosis or demodicidosis, which can be an etiological factor of or resemble a variety of dermatoses. Therefore, a high index of clinical suspicion about the etiological role of Demodex in various dermatoses can help in early diagnosis and appropriate, timely, and cost effective management. PMID:24470662

  17. MAK, a computational tool kit for automated MITE analysis

    Microsoft Academic Search

    Guojun Yang; Timothy C. Hall

    2003-01-01

    Miniature inverted repeat transposable elements (MITEs) are ubiquitous and numerous in higher eukaryotic genomes. Analysis of MITE families is laborious and time consuming, especially when multiple MITE families are involved in the study. Based on the structural characteristics of MITEs and genetic principles for transposable elements (TEs), we have developed a computational tool kit named MITE analysis kit (MAK) to

  18. Biodiversity of date palm

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The date palm (Phoenix dactylifera) is the dominant component upon which the sustainable biophysical and socio-economic structures of the oasis ecosystem are based; a fruit tree with unique nutritional, biochemical and biophysical characteristics, a rich source of aesthetic and cultural values, and ...

  19. Palm Savannah in Pantanal

    USGS Multimedia Gallery

    Seasonally flooded palm savannah and cleared landing strip near the Rio Negro river. Located near RAMSAR site and Rio Negro National Park in the Pantanal ecoregion, near the border between Paraguay and Bolivia. This region, situated in the extreme northeastern corner of western Paraguay and extendin...

  20. A new mite-plant association: mites living amidst the adhesive traps of a carnivorous plant

    Microsoft Academic Search

    Ramón J. Antor; María B. García

    1995-01-01

    Non-antagonistic interactions between arthropods and leaves of insectivorous plants with adhesive traps so far have never been reported. The mites are common prey of such plants, but we have found a new subspecies of the mite Oribatula tibialis living on the leaves of Pinguicula longifolia. Because of its small size and the low glandular density of the host, the mite

  1. Evaluation of large-scale releases of western predatory mite for spider mite control in cotton

    E-print Network

    Rosenheim, Jay A.

    and Nikol- ski, and T. urticae Koch, are important pests of cotton in the San Joaquin Valley of CaliforniaEvaluation of large-scale releases of western predatory mite for spider mite control in cotton, for spider mite control in organically and conventionally managed commercial cotton fields. An important

  2. Coconut, date and oil palm genomics

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A review of genomics research is presented for the three most economically important palm crops, coconut (Cocos nucifera), date palm (Phoenix dactylifera) and oil palm (Elaeis guineensis), encompassing molecular markers studies of genetic diversity, genetic mapping, quantitative trait loci discovery...

  3. Managing Varroa Mites in Honey Bee Colonies

    E-print Network

    Tarpy, David R.

    Managing Varroa Mites in Honey Bee Colonies The varroa mite (Varroa destructor) is the most serious pest of honey bee colonies worldwide. This parasite was first detected in North Carolina in 1990, having been introduced to the U.S. just three years earlier. Virtually all feral (or "wild") honey bee

  4. PALM GAME DESIGN Pieter Spronck

    E-print Network

    Spronck, Pieter

    PALM GAME DESIGN Pieter Spronck Universiteit Maastricht IKAT/Infonomics P.O. Box 616 NL-6200 MD Maastricht, The Netherlands E-mail: p.spronck@cs.unimaas.nl KEYWORDS Gaming, handheld computers, software engineering, design. ABSTRACT Though the Palm is mainly a business tool, many games have been developed

  5. Haematophagus Mites in Poultry Farms of Iran

    PubMed Central

    Rahbari, S; Nabian, S; Ronaghi, H

    2009-01-01

    Background: Blood sucking mites are important avian ectoparasites which being found on bird species worldwide. Their presence are problematic for the producers either through potential direct effects on weight gain, egg production, sperm production in roosters or as nuisance pests on worker handle hens and eggs. The aim of this study was pointing out of the status of haematophagus mites. Methods: Eight caged layer and four breeder flocks were visited, monitoring for the presence of chicken mites performed by removing and examining debris from poultry house, infested nesting material collected into zip lock plastic bags and at least 20 birds were also randomly selected to examine the presence of chicken mites. Mites obtained from each population were mounted in Hoyer’s medium on microscope slides and identified. All eight caged layer and four breeder flocks were inspected, which were infested with chicken blood feeding mites. Results: Massive infestations of Dermanyssus gallinae were common with huge numbers of parasites on birds, cages and the conveyor belts for egg. Only one farm from Mazandaran Province was infested to Ornithonyssus bursa. Conclusion: Dermanyssus gallinae was the most prevalent blood feeder mite in the breeder and caged layer flocks in Iran, while O. bursa was reported as a first record, which found only in a breeder flock in Mazanderan Province. It seems that its presence is limited into the area which affected by both warm and humid environmental conditions. PMID:22808378

  6. Cross-Antigenicity Between the Scabies Mite, Sarcoptes scabiei, and the House Dust Mite, Dermatophagoides pteronyssinus

    Microsoft Academic Search

    Larry G. Arlian; Diann L. Vyszenski-Moher; Salva G. Ahmed; Stephen A. Estes

    1991-01-01

    This study demonstrated that antigens of the parasitic mite Sarcoptes scabiei (SS) cross-react with antigens of the house dust mite Dermatophagoides pteronyssinus(DP). Crossed immunoelectrophoresis (CE) reaction of SS extract with rabbit anti-DP serum resulted in multiple immunoprecipitates. Reciprocal CIE reactions gave similar results. Immunoprecipitates from both reactions bound IgE in the sera of dust-mite – sensitive patients who had no

  7. An opilioacarid mite in Cretaceous Burmese amber

    NASA Astrophysics Data System (ADS)

    Dunlop, Jason A.; de Oliveira Bernardi, Leopoldo Ferreira

    2014-09-01

    A fossil opilioacarid mite (Parasitiformes: Opilioacarida) in Burmese amber is described as ? Opilioacarus groehni sp. nov. This ca. 99 Ma record (Upper Cretaceous: Cenomanian) represents only the third fossil example of this putatively basal mite lineage, the others originating from Eocene Baltic amber (ca. 44-49 Ma). Our new record is not only the oldest record of Opilioacarida, but it is also one of the oldest examples of the entire Parasitiformes clade. The presence of Opilioacarida—potentially Opiloacarus—in the Cretaceous of SE Asia suggests that some modern genus groups were formerly more widely distributed across the northern hemisphere, raising questions about previously suggested Gondwanan origins for these mites.

  8. Mites as selective fungal carriers in stored grain habitats.

    PubMed

    Hubert, Jan; Stejskal, Václav; Kubátová, Alena; Munzbergová, Zuzana; Vánová, Marie; Zd'árková, Eva

    2003-01-01

    Mites are well documented as vectors of micromycetes in stored products. Since their vectoring capacity is low due to their small size, they can be serious vectors only where there is selective transfer of a high load of specific fungal species. Therefore the aim of our work was to find out whether the transfer of fungi is selective. Four kinds of stored seeds (wheat, poppy, lettuce, mustard) infested by storage mites were subjected to mycological analysis. We compared the spectrum of micromycete species isolated from different species of mites (Acarus siro, Lepidoglyphus destructor, Tyrophagus putrescentiae, Caloglyphus rhizoglyphoides and Cheyletus malaccensis) and various kinds of stored seeds. Fungi were separately isolated from (a) the surface of mites, (b) the mites' digestive tract (= faeces), and (c) stored seeds and were then cultivated and determined. The fungal transport via mites is selective. This conclusion is supported by (i) lower numbers of isolated fungal species from mites than from seeds; (ii) lower Shannon-Weaver diversity index in the fungal communities isolated from mites than from seeds; (iii) significant effect of mites/seeds as environmental variables on fungal presence in a redundancy analysis (RDA); (iv) differences in composition of isolated fungi between mite species shown by RDA. The results of our work support the hypothesis that mite-fungal interactions are dependent on mite species. The fungi attractive to mites seem to be dispersed more than others. The selectivity of fungal transport via mites enhances their pest importance. PMID:14580060

  9. Inactivation of dust mites, dust mite allergen, and mold from carpet.

    PubMed

    Ong, Kee-Hean; Lewis, Roger D; Dixit, Anupma; MacDonald, Maureen; Yang, Mingan; Qian, Zhengmin

    2014-01-01

    Carpet is known to be a reservoir for biological contaminants, such as dust mites, dust mite allergen, and mold, if it is not kept clean. The accumulation of these contaminants in carpet might trigger allergies or asthma symptoms in both children and adults. The purpose of this study is to compare methods for removal of dust mites, dust mite allergens, and mold from carpet. Carpets were artificially worn to simulate 1 to 2 years of wear in a four-person household. The worn carpets were inoculated together with a common indoor mold (Cladosporium species) and house dust mites and incubated for 6 weeks to allow time for dust mite growth on the carpet. The carpets were randomly assigned to one of the four treatment groups. Available treatment regimens for controlling carpet contaminants were evaluated through a literature review and experimentation. Four moderately low-hazard, nondestructive methods were selected as treatments: vacuuming, steam-vapor, Neem oil (a natural tree extract), and benzalkonium chloride (a quaternary ammonium compound). Steam vapor treatment demonstrated the greatest dust mite population reduction (p < 0.05) when compared to other methods. The two physical methods, steam vapor and vacuuming, have no statistically significant efficacy in inactivating dust mite allergens (p = 0.084), but have higher efficacy when compared to the chemical method on dust mite allergens (p = 0.002). There is no statistically significant difference in the efficacy for reducing mold in carpet (p > 0.05) for both physical and chemical methods. The steam-vapor treatment effectively killed dust mites and denatured dust mite allergen in the laboratory environment. PMID:24467247

  10. The biology of allergenic domestic mites

    Microsoft Academic Search

    Barbara J. Hart

    1995-01-01

    Conclusion  Since 1990 our knowledge of the biology of domestic mites has increased in a number of areas. Taxonomically, keys that are\\u000a easier to use by nonacarologists have been made available and should help in clinical studies of mite populations in the home\\u000a environment. From house dust surveys our understanding of the geographical distribution ofE. maynei andB. tropicalis has progressed. Detailed

  11. Spectral response of spider mite infested cotton: Mite density and miticide rate study

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Two-spotted spider mites are important pests in many agricultural systems. Spider mites (Acari: Tetranychidae) have been found to cause economic damage in corn, cotton, and sorghum. Adult glass vial bioassays indicate that Temprano™ (abamectin) is the most toxic technical miticide for adult two-spot...

  12. January/February 2001 CheckMite+, 2001 Bears New Mite Book

    E-print Network

    Ferrara, Katherine W.

    completely. Fleeting Monetary Assistance According to a letter that I received from the American Beekeeping), there have been reports of significant losses of colonies in some beekeeping operations. Similar losses last year were attributed to Varroa mites, since many beekeepers did not use coumaphos (CheckMite+® ) strips

  13. Wheat curl mite and dry bulb mite: untangling a taxonomic conundrum through a multidisciplinary approach

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The taxonomy of two economically important eriophyoid species, Aceria tosichella (wheat curl mite, WCM) and A. tulipae (dry bulb mite, DBM), was confounded in the world literature until the late 20th century due to their morphological similarity and ambiguous data from plant-transfer and virus-trans...

  14. Raoiella Indica: Facing it

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Biological invasions are a major threat to natural ecosystems and agricultural crop production. With globalization, the increase in trade and movement of people, the frequency of species invasions has substantially grown in the last three decades. Polyphagous pest species targeting hosts with wide d...

  15. Cat, Dust Mite Allergies Linked to Childhood Asthma

    MedlinePLUS

    ... sharing features on this page, please enable JavaScript. Cat, Dust Mite Allergies Linked to Childhood Asthma Study ... 23, 2015 (HealthDay News) -- Toddlers and preschoolers with cat and dust mite allergies may face an increased ...

  16. Palms on a forest floor in Florida

    NSDL National Science Digital Library

    Katie Hale (California State University, Fullerton; Student, Biological Sciences)

    2007-01-13

    Palms are also monocots and have only one seed leaf (dicots have two seed leaves). The flowers of palms have leaves in multiples of three. Monocots differ from dicots in root and tissue structure also, but all are angiosperms.

  17. Lipase-catalyzed hydrolysis of palm oil

    Microsoft Academic Search

    H. T. Khor; N. H. Tan; C. L. Chua

    1986-01-01

    The hydrolysis of palm oil, palm olein and palm stearin, soybean oil, corn oil and peanut oil by the commercial lipase fromCandida rugosa (formerly known asC. cylindracea) was studied. The optimal conditions for the hydrolysis of palm oil by the lipase were established. The lipase fromC. rugosa exhibits an optimal activity at 37 C and at pH 7.5. The optimal

  18. Induction of atopic dermatitis by inhalation of house dust mite

    Microsoft Academic Search

    Ron A. Tupker; Jan G. R. De Monchy; Pieter J. Coenraads; Aafke Homan; Jan B. van der Meer

    1996-01-01

    BACKGROUND: The pathogenetic role of house dust mite in atopic dermatitis remains controversial. Recent studies have shown that intensive epicutaneous contact of house dust mite allergen with premanipulated skin may induce dermatitis. It is, however, uncertain whether such conditions are met during natural contact with house dust mite. In the past, allergen inhalation has been suggested to induce exacerbation of

  19. Dust mites living in human lungs – the cause of asthma?

    Microsoft Academic Search

    H van Woerden

    2004-01-01

    Asthma does not have a clear cause and may represent a cluster of diseases. We propose that asthma in house dust mite sensitive patients may be caused by recurrent inhalation of live dust mites which are able to live for some time in the bronchioles of the lung. To provide themselves with a food source, the mites may purposefully excrete

  20. Sept/Oct 2004 Mites Influencing Pollination Honey Refractometers

    E-print Network

    Ferrara, Katherine W.

    . Robbing bees brought more mites to the original hives. Dis- oriented drones drifted into neighboring. At this "peak" of mite numbers, commercial beekeep- ers had to treat their colon- ies with acaricides as many, time-release product has not come onto the market for mite control. In many commercial bee- keeping

  1. Does the removal of mite-infested brood facilitate grooming?

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The relationship between the removal of mite-infested brood and mite drop was compared using Russian (RHB, n = 9) and Italian (IHB, n = 9) honey bee colonies. A cloake board was used to isolate test brood frame on the top hive body and the metal sheet served as a varroa trap. Inoculum mites were col...

  2. The stability of house dust mite allergens in glycerinated extracts

    Microsoft Academic Search

    Lyudmila N Soldatova; Elizabeth J Paupore; Suzann H Burk; Richard W Pastor; Jay E Slater

    2000-01-01

    Background: Mite allergen vaccines are important diagnostic and immunotherapeutic reagents. Previous studies on mite allergen stability under different storage conditions have yielded contradictory results. Objective: We sought to compare, over a 12-month period, the stability of mite allergens reconstituted in 50% glycerol and stored at different temperatures and to examine the role of protease inhibitors in enhancing allergen stability. Methods:

  3. Lake Worth Inlet Palm Beach Harbor

    E-print Network

    US Army Corps of Engineers

    #12;1 Lake Worth Inlet Palm Beach Harbor Palm Beach County, Florida Integrated Feasibility Report, was engaged to conduct the IEPR of the Lake Worth Inlet, Palm Beach Harbor Integrated Feasibility Report and recent rates was added to Section 4.2.3. Clarification on the grouping of asphalt, fuel oil

  4. Acaricides and predatory mites against the begonia mite, Polyphagotarsonemus latus (Acari: Tarsonemidae), on Hedera helix.

    PubMed

    Audenaert, Joachim; Vissers, Marc; Haleydt, Bart; Verhoeven, Ruth; Goossens, Frans; Gobin, Bruno

    2009-01-01

    In recent years, the begonia mite (Polyphagotarsonemus lotus) has become an important threat to different ornamental cultures in warm greenhouses. At present there are no professional plant protection products registered in Belgium for the control of mites of the Tarsonemidae family. In a screening trial, we evaluated the efficacy of a range of different acaricides: abamectin, milbemectin, pyridaben, spirodiclofen. Based on the results of the screening trial several products were selected for a full efficacy trial following EPPO guidelines. The best control results were obtained with two products from the avermectine group: abamectin and milbemectin. As growers currently have to rely solely on the use of natural enemies there is a strong need for practical evaluation of efficacies of the various predatory mite species (Amblyseius swirskii, A. cucumeris, A. andersoni) used in biological mite control. In a series of experiments, we screened the use of different species of predatory mites. The first efficacy trials on heavily infested plants at different rates of dosage and under different circumstances (temperature, dose rate, application technique) were started in May 2008. In these experiments Amblyseius swirskii showed good efficacy. But temperature was the limiting factor: the predatory mite needed a minimal temperature of 18 degrees C to obtain good results. Further research is necessary to search for predatory mites that can be used in winter conditions (lower temperatures, less light). PMID:20218530

  5. A new versatile and robust mite trap for detection and monitoring of storage mites in the cereal and allied industries

    Microsoft Academic Search

    B. B. Thind

    2005-01-01

    Storage mites are important primary pests but present methods for trapping them are either rudimentary or have several limitations. These prevent effective early detection or reliable monitoring of mites in the food, animal feed and associated industries. The BT Trap is the first trap designed specifically for the detection and monitoring of mite infestation. This trap is made up of

  6. Survival and behavioural response to acaricides of the coconut mite predator Neoseiulus baraki.

    PubMed

    Lima, Debora B; Melo, José W S; Guedes, Raul N C; Siqueira, Herbert A A; Pallini, Angelo; Gondim, Manoel G C

    2013-07-01

    The coconut mite, Aceria guerreronis Keifer, is a major pest of coconut palm in the world. The control of this pest species is done through acaricide applications at short time intervals. However, the predators of this pest may also be affected by acaricides. Among the predators of A. guerreronis, Neoseiulus baraki (Athias-Henriot) has potential for biological control. The objective of this study was to assess the effect of acaricides on the survival and behavior of N. baraki. The survivorship of N. baraki was recorded in surface-impregnated arenas. Choice and no-choice behavioral bioassays were carried out using a video tracking system to assess the walking behavior of the predator under acaricide exposure. Although all acaricides negatively affected the survival of N. baraki, chlorfenapyr and azadirachtin caused lower effect than the other acaricides. No significant differences in walking behavior were observed under exposure to fenpyroximate, chlorfenapyr and chlorpyrifos on fully-contaminated arenas. Azadirachtin and chlorpyrifos caused repellence. Irritability was observed for all acaricides, except for abamectin. Chlorfenapyr was the most suitable product for managing the coconut mite because of its low effect on survival and behavior of N. baraki. PMID:23224672

  7. Processing of fresh palm fruits using microwaves.

    PubMed

    Chow, Mee Chin; Ma, Ah Ngan

    2007-01-01

    Microwave heating was determined in this study to be suitable for the detachment and drying of palm fruits from whole bunches, cut bunches and spikelets. Microwave treatment of the palm fruits was able to attain the objectives of conventional fresh palm fruits sterilization processeses such as fruit softening, nut conditioning and halting of enzymatic lipolysis. Palm oil and kernel oil solvent extracted respectively from the microwave treated whole fruits and kernel were found to have a good quality of low free fatty acid content. This technology, together with the solvent extraction of the dehydrated fruits, may have the potential to be a continuous, dry and clean technology for palm oil milling. PMID:17645207

  8. The occurrence of mite-containing wheat flour.

    PubMed

    Matsumoto, Tomoaki; Satoh, Ayumi

    2004-10-01

    Anaphylaxis after eating mite-infested wheat flour has been recently reported. This paper is to describe two cases and examine the occurrence of mite contamination in wheat flour in Japan. Packages of wheat flour from retail outlets and homes were examined microscopically for the presence of mites. Three of 176 packages from retail outlets and seven of 127 from homes were infested with mites, and it seems likely that the mite contamination takes place in most cases at homes after the packages have been opened. No mites were found in packages stored in a refrigerator, therefore, mite-sensitive patients must be advised to store wheat flour products in a refrigerator. PMID:15482524

  9. [House-dust mites as vectors of human diseases].

    PubMed

    Hoffmann, G

    1982-01-01

    The genuine European house-dust mite, Dermatophagoides pteronyssinus, is the producer of the most common and most potent allergen in the house-dust in Central Europe. Such allergens causing asthma, rhinitis, tracheitis, bronchitis and/or conjunctivitis in man may also be produced by the other species of house-dust mites such as D. farinae and Euroglyphus maynei. House mites and mites of stored products rarely account for such diseases but more frequently for acarodermatitis--especially on farms. Allergies due to house-dust mites mainly occur in midsummer and in early autumn. Particularly children under 10 years of age are effected by these allergies. Textile articles such as mattresses, upholstered furniture and carpets are breeding places of the genuine house-dust mites. Skin scales of humans, mammals and birds affected by mould provide the nutritional substrate of the mites. PMID:7184173

  10. P-MITE: a database for plant miniature inverted-repeat transposable elements

    PubMed Central

    Chen, Jiongjiong; Hu, Qun; Zhang, Yu; Lu, Chen; Kuang, Hanhui

    2014-01-01

    Miniature inverted-repeat transposable elements (MITEs) are prevalent in eukaryotic species including plants. MITE families vary dramatically and usually cannot be identified based on homology. In this study, we de novo identified MITEs from 41 plant species, using computer programs MITE Digger, MITE-Hunter and/or Repetitive Sequence with Precise Boundaries (RSPB). MITEs were found in all, but one (Cyanidioschyzon merolae), species. Combined with the MITEs identified previously from the rice genome, >2.3 million sequences from 3527 MITE families were obtained from 41 plant species. In general, higher plants contain more MITEs than lower plants, with a few exceptions such as papaya, with only 538 elements. The largest number of MITEs is found in apple, with 237 302 MITE sequences. The number of MITE sequences in a genome is significantly correlated with genome size. A series of databases (plant MITE databases, P-MITE), available online at http://pmite.hzau.edu.cn/django/mite/, was constructed to host all MITE sequences from the 41 plant genomes. The databases are available for sequence similarity searches (BLASTN), and MITE sequences can be downloaded by family or by genome. The databases can be used to study the origin and amplification of MITEs, MITE-derived small RNAs and roles of MITEs on gene and genome evolution. PMID:24174541

  11. PRODUCTION AND COLONIZATION OF IMPORTED NATURAL ENEMIES OF AVOCADO MITE PESTS

    Microsoft Academic Search

    C. A. Fleschner; Glenn Scriven

    Members of the genus Stethorus are widely distributed predators of tetranychid mites and are often effective in controlling population outbreaks of these mites. Other predators, such as predaceous mites, thrips, and green lacewings, are instrumental in maintaining mite populations at low densities, but generally they are not effective in controlling high-density populations of mites. Although native species of Stethorus are

  12. LAKE WORTH INLET (PALM BEACH HARBOR) NAVIGATION IMPROVEMENT PROJECT

    E-print Network

    US Army Corps of Engineers

    LAKE WORTH INLET (PALM BEACH HARBOR) NAVIGATION IMPROVEMENT PROJECT PALM BEACH COUNTY, FLORIDA 24 January 2014 ABSTRACT: Lake Worth Inlet connects Palm Beach Harbor to the Atlantic Ocean. The port is located in Riviera Beach, Palm Beach County, Florida. The Port of Palm Beach is the fourth busiest

  13. Separating Tocotrienols from Palm Oil by Molecular Distillation

    Microsoft Academic Search

    Donghong Liu; John Shi; Luidy Rodríguez Posada; Yukio Kakuda; Sophia Jun Xue

    2008-01-01

    Crude palm oil contains approximately 1% minor components, including carotenoids and vitamin E (tocopherols and tocotrienols), which contribute to the stability and nutritional properties of palm oil. Palm oil is considered one of the best sources of vitamin E. The vitamin E content in palm oil is unique because it is composed of tocotrienols rather than tocopherols. Palm fatty acid

  14. Whitish papules on the palm.

    PubMed

    Kocatürk, Emek; Kavala, Mukaddes; Büyükbabani, Nesimi; Türko?lu, Zafer

    2007-07-01

    A 21-year-old woman presented with a 1-month history of whitish bubbling of the palms after brief exposure to water. The symptoms arose within 3-5 min after immersion in water, as a white sponge-like appearance, and resolved after a variable drying period. She was otherwise healthy and did not complain of hyperhidrosis. There was no family history of similar lesions. Physical examination revealed a healthy appearance of the palms; however, 5 min after immersion of the hands in warm water, the central part of the left palm became swollen and tiny white papules with dilated puncta appeared. The right palm also showed similar changes. These asymptomatic papules with a tendency to coalesce became more prominent with prolonged exposure (Figs 1 and 2). The lesions resolved completely approximately 30 min after removal of the hands from water. A biopsy taken from the lesional skin revealed dilatation of intraepidermal eccrine ducts and a spongy appearance in the corneal layer (Fig. 3). A diagnosis of aquagenic syringeal palmar keratoderma was made on the basis of these clinical and histopathologic findings. A short course of treatment with topical aluminum chloride resulted in a remarkable response in 1 week. She had no recurrence after 1 year. PMID:17614805

  15. Steam deacidification of palm oil

    Microsoft Academic Search

    Klicia A. Sampaio; Roberta Ceriani; Simone M. Silva; Thiago Taham; Antonio J. A. Meirelles

    2011-01-01

    This work presents the application of response surface methodology (RSM) to the study of the effects of three factors (temperature, percent stripping steam and the stearin\\/olein ratio) on the losses\\/transfer of fatty compounds during the steam deacidification of blends of palm oil fractions (stearin and olein) as model systems. The responses of interest were the final oil acidity and the

  16. Growth of Hereford-Kedah Kelantan calves fed oil palm fronds and palm kernel cake based diet

    E-print Network

    Paris-Sud XI, Université de

    Growth of Hereford-Kedah Kelantan calves fed oil palm fronds and palm kernel cake based diet I-products that are suitable for livestock feed such as palm kernel cake (PKC) and palm oil mill effluent (POME). In the farm-Kedah Kelantan (HK) cows bred in a semi-intensive system were fed a palm kernel cake based diet supplemented

  17. Mites associated with stored products in Greece.

    PubMed

    Palyvos, Nickolas E; Emmanouel, Nickolas G; Saitanis, Costas J

    2008-03-01

    A faunistic survey of mites was conducted in many product stores during a 6-year study period, 2000-2005, in Greece. A total of 1,073 samples were taken from 34 Greek counties. The survey was carried out on grains (wheat, maize, oat, barley), flour, bran, manufactured agricultural foodstuffs, dried fruits (figs, raisins), residues and dust, stored in varying quantities in five types of storage facilities (stores of agricultural cooperative unions, farm stores, commercial stores, flour mills and silos). Dominance-frequency analysis and redundancy analysis (RDA) were used to reveal the preferences of the collected taxa. Approximately 55% of the samples contained mites and 65 mite taxa were identified, belonging to 15 families in four orders. Six species, namely, Acarus gracilis Hughes, A. immobilis Griffiths, Caloglyphus oudemansi (Zachvatkin), Suidasia medanensis Oudemans, Tyrophagus perniciosus Zachvatkin and Kleemania plumigera (Oudemans), were new to the fauna of Greece. Five species, Tyrophagus similis Volgin, Blattisocius mali (Oudemans), Neoseiulus barkeri (Hughes), Cheyletus cacahuamilpensis Baker and Storchia robustus (Berlese), were recorded for the first time in stored products in Greece. Lepidoglyphus destructor (Schrank), Tyrophagus putrescentiae (Schrank) and Acarus siro L. were dominant or intermediate in all storage facilities examined. Cheyletus malaccensis Oudemans was the most common predatory mite. The highest percentage of infestation (65.3) was recorded in the samples from stores of agricultural cooperative unions. Residue-type materials had the highest degrees and percentages of infestation. PMID:18379887

  18. [Housedust mites in Punta Arenas city, Chile].

    PubMed

    Franjola, R; Rosinelli, D

    1999-01-01

    In medicine, the importance of mites in house dust gains importance from day to day. The close relation between these arthropods and man is the cause of a series of health problems such as allergic asthma, rhinitis and/or dermatitis. House dust samples were collected between January and December 1991 in Punta Arenas, city, Chile. Samples were processed by the Artigas and Casanueva (1983) technique, modified by Muńoz et al. (1983). The isolated specimens were subsequently identified using the Artigas and Casnueva (1983) pictorial key. Of the 134 samples study, 29.1% presented one or more mite species. A total of 13 species were classified. Eight of them were registered for the city of Punta Arenas for the first time. Average weight of the dust analysed was 8.4 g. Mites were found from 0.2 g. onwards. A total of 1768 specimens was collected. The species more representative were: Blomia tjibodas (30.1%), Glycyphagus destructor (22.5%) and Tyrophagus putrescentiae (10.8%). The seasons that presented the higher proportions of mites were autumn (39.4%) and spring (37.1%). PMID:10883495

  19. Feather mites of the greater sandhill crane.

    PubMed

    Atyeo, W T; Windingstad, R M

    1979-08-01

    New taxa are described from Grus canadensis tabida: Brephosceles petersoni sp. n. (Alloptidae); Pseudogabucinia reticulata sp. n. (Kramerellidae); Geranolichus canadensis sp. n., and Gruolichus wodashae, gen. et sp. n. (Pterolichidae). Observations on resource partitioning by these mites are given. PMID:512759

  20. Standard methods for tracheal mite research

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This chapter, for the COLOSS Beebook from the Bee Research Center in Switzerland, summarizes all the current information about the tracheal mite (Acarapis woodi) infesting honey bees (Apis mellifera). The chapter covers the effects on bees, its life history, and its range, as well as the identifica...

  1. INSECT AND MITES NEW TO FLORIDA SUGARCANE

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The number of insect and mite species attacking sugarcane in Florida has increased over time. Five new pest species were discovered during the 31-year period 1964 to 1995, one species indigenous to Florida with no previous association with sugarcane and four invasive species entirely new to the Ever...

  2. Research advancements in palm oil nutrition*

    PubMed Central

    May, Choo Yuen; Nesaretnam, Kalanithi

    2014-01-01

    Palm oil is the major oil produced, with annual world production in excess of 50 million tonnes. About 85% of global palm oil produced is used in food applications. Over the past three decades, research on nutritional benefits of palm oil have demonstrated the nutritional adequacy of palm oil and its products, and have resulted in transitions in the understanding these attributes. Numerous studies have demonstrated that palm oil was similar to unsaturated oils with regards to effects on blood lipids. Palm oil provides a healthy alternative to trans-fatty acid containing hydrogenated fats that have been demonstrated to have serious deleterious effects on health. The similar effects of palm oil on blood lipids, comparable to other vegetable oils could very well be due to the structure of the major triglycerides in palm oil, which has an unsaturated fatty acid in the stereospecific numbers (sn)-2 position of the glycerol backbone. In addition, palm oil is well endowed with a bouquet of phytonutrients beneficial to health, such as tocotrienols, carotenoids, and phytosterols. This review will provide an overview of studies that have established palm oil as a balanced and nutritious oil.

  3. Relationship between the ability to penetrate complex webs of Tetranychus spider mites and the ability of thread-cutting behavior in phytoseiid predatory mites

    Microsoft Academic Search

    Takeshi Shimoda; Hidenari Kishimoto; Junji Takabayashi; Hiroshi Amano; Marcel Dicke

    2010-01-01

    Predatory mites, that are important natural enemies of Tetranychus spider mites, are less hindered by complex webs of the spider mites than are other predatory mites that are natural enemies of other pest herbivores. This can be partly explained by their chaetotaxy, a morphological protection against the webs. However, it has up to now been unclear whether the ability to

  4. Syrian Christian HistorySyrian Christian History Inscribed on PalmInscribed on Palm

    E-print Network

    Srinivasan, N.

    Syrian Christian HistorySyrian Christian History Inscribed on PalmInscribed on Palm Centre) The Syrian Christian palm-leaves and inscriptions of Kerala are one among the least exploited primary sources of the Christian Community. Although there are a good number of research studies on the history of the St. Thomas

  5. Diversity of feather mites (Acari: Astigmata) on Darwin's finches.

    PubMed

    Villa, Scott M; Le Bohec, Céline; Koop, Jennifer A H; Proctor, Heather C; Clayton, Dale H

    2013-10-01

    Feather mites are a diverse group of ectosymbionts that occur on most species of birds. Although Darwin's finches are a well-studied group of birds, relatively little is known about their feather mites. Nearly 200 birds across 9 finch species, and from 2 locations on Santa Cruz Island, Galápagos, were dust-ruffled during the 2009 breeding season. We found 8 genera of feather mites; the most prevalent genus was Mesalgoides (53-55%), followed by Trouessartia (40-45%), Amerodectes and Proctophyllodes (26-33%), Xolalgoides (21-27%), Analges and Strelkoviacarus (0-6%), and Dermoglyphus (2-4%). There was no evidence for microclimatic effects (ambient temperature and relative humidity) on mite diversity. Host body mass was significantly correlated with mean feather mite abundance across 7 of 8 well-sampled species of finches. Certhidea olivacea, the smallest species, did not fit this pattern and had a disproportionately high number of mites for its body mass. PMID:23691947

  6. Intestinal proteases of free-living and parasitic astigmatid mites.

    PubMed

    Holt, Deborah C; Burgess, Stewart T G; Reynolds, Simone L; Mahmood, Wajahat; Fischer, Katja

    2013-02-01

    Among arthropod pests, mites are responsible for considerable damage to crops, humans and other animals. However, detailed physiological data on these organisms remain sparse, mainly because of their small size but possibly also because of their extreme diversity. Focusing on intestinal proteases, we draw together information from three distinct mite species that all feed on skin but have separately adapted to a free-living, a strictly ecto-parasitic and a parasitic lifestyle. A wide range of studies involving immunohistology, molecular biology, X-ray crystallography and enzyme biochemistry of mite gut proteases suggests that these creatures have diverged considerably as house dust mites, sheep scab mites and scabies mites. Each species has evolved a particular variation of a presumably ancestral repertoire of digestive enzymes that have become specifically adapted to their individual environmental requirements. PMID:22427061

  7. Remote sensing of spider mite damage in California peach orchards

    NASA Astrophysics Data System (ADS)

    Luedeling, Eike; Hale, Adam; Zhang, Minghua; Bentley, Walter J.; Dharmasri, L. Cecil

    2009-08-01

    Remote sensing techniques can decrease pest monitoring costs in orchards. To evaluate the feasibility of detecting spider mite damage in orchards, we measured visible and near infrared reflectance of 1153 leaves and 392 canopies in 11 peach orchards in California. Pairs of significant wavelengths, identified by Partial Least Squares regression, were combined into normalized difference indices. These and 9 previously published indices were evaluated for correlation with mite damage. Eight spectral regions for leaves and two regions for canopies (at blue and red wavelengths) were significantly correlated with mite damage. These findings were tested by calculating normalized difference indices from the Red and Blue bands of six multispectral aerial images. Index values were linearly correlated with mite damage ( R2 = 0.47), allowing identification of mite hotspots in orchards. However, better standardization of aerial imagery and accounting for perturbing environmental factors will be necessary for making this technique applicable for early mite detection.

  8. Palm oil and the heart: A review

    PubMed Central

    Odia, Osaretin J; Ofori, Sandra; Maduka, Omosivie

    2015-01-01

    Palm oil consumption and its effects on serum lipid levels and cardiovascular disease in humans is still a subject of debate. Advocacy groups with varying agenda fuel the controversy. This update intends to identify evidence-based evaluations of the influence of palm oil on serum lipid profile and cardiovascular disease. Furthermore, it suggests a direction for future research. The sources of information were based on a PubMed, Google Scholar, African Journal online and Medline search using key words including: palm oil, palmitic acid, saturated fatty acids and heart disease. Published animal and human experiments on the association of palm oil and its constituents on the serum lipid profile and cardiovascular disease were also explored for relevant information. These papers are reviewed and the available evidence is discussed. Most of the information in mainstream literature is targeted at consumers and food companies with a view to discourage the consumption of palm oil. The main argument against the use of palm oil as an edible oil is the fact that it contains palmitic acid, which is a saturated fatty acid and by extrapolation should give rise to elevated total cholesterol and low-density lipoprotein cholesterol levels. However, there are many scientific studies, both in animals and humans that clearly show that palm oil consumption does not give rise to elevated serum cholesterol levels and that palm oil is not atherogenic. Apart from palmitic acid, palm oil consists of oleic and linoleic acids which are monounsaturated and polyunsaturated respectively. Palm oil also consists of vitamins A and E, which are powerful antioxidants. Palm oil has been scientifically shown to protect the heart and blood vessels from plaques and ischemic injuries. Palm oil consumed as a dietary fat as a part of a healthy balanced diet does not have incremental risk for cardiovascular disease. Little or no additional benefit will be obtained by replacing it with other oils rich in mono or polyunsaturated fatty acids. PMID:25810814

  9. Palm oil and the heart: A review.

    PubMed

    Odia, Osaretin J; Ofori, Sandra; Maduka, Omosivie

    2015-03-26

    Palm oil consumption and its effects on serum lipid levels and cardiovascular disease in humans is still a subject of debate. Advocacy groups with varying agenda fuel the controversy. This update intends to identify evidence-based evaluations of the influence of palm oil on serum lipid profile and cardiovascular disease. Furthermore, it suggests a direction for future research. The sources of information were based on a PubMed, Google Scholar, African Journal online and Medline search using key words including: palm oil, palmitic acid, saturated fatty acids and heart disease. Published animal and human experiments on the association of palm oil and its constituents on the serum lipid profile and cardiovascular disease were also explored for relevant information. These papers are reviewed and the available evidence is discussed. Most of the information in mainstream literature is targeted at consumers and food companies with a view to discourage the consumption of palm oil. The main argument against the use of palm oil as an edible oil is the fact that it contains palmitic acid, which is a saturated fatty acid and by extrapolation should give rise to elevated total cholesterol and low-density lipoprotein cholesterol levels. However, there are many scientific studies, both in animals and humans that clearly show that palm oil consumption does not give rise to elevated serum cholesterol levels and that palm oil is not atherogenic. Apart from palmitic acid, palm oil consists of oleic and linoleic acids which are monounsaturated and polyunsaturated respectively. Palm oil also consists of vitamins A and E, which are powerful antioxidants. Palm oil has been scientifically shown to protect the heart and blood vessels from plaques and ischemic injuries. Palm oil consumed as a dietary fat as a part of a healthy balanced diet does not have incremental risk for cardiovascular disease. Little or no additional benefit will be obtained by replacing it with other oils rich in mono or polyunsaturated fatty acids. PMID:25810814

  10. Quality of fried foods with palm oil

    Microsoft Academic Search

    Masashi Sakata; Yoshikazu Takahashi; Masanori Sonehara

    1985-01-01

    The amount of imported palm oil in Japan during the past few years has been 140,000–150,000 tons per year, or about 9% of\\u000a the total consumption of vegetable oils in Japan.\\u000a \\u000a In 1975, part of the palm oil was imported as refined type from Malaysia. At the present time, almost all of the palm oil\\u000a from Malaysia is refined. At

  11. Isothermal crystallization kinetics of refined palm oil

    Microsoft Academic Search

    C. W. Chen; O. M. Lai; H. M. Ghazali; C. L. Chong

    2002-01-01

    The induction times for the crystallization, under isothermal conditions, of refined, bleached, and deodorized palm oil from\\u000a the melt were studied by viscometry. At temperatures below 295 K, the crystallization of palm oil was observed to occur in\\u000a a two-stage process. This two-stage process was caused by the fractionation of palm oil, most probably into the stearin and\\u000a olein fractions.

  12. Parthenogenesis in Oribatid Mites (Acari, Oribatida): Evolution Without Sex

    Microsoft Academic Search

    Michael Heethoff; Roy A. Norton; Stefan Scheu; Mark Maraun

    \\u000a Oribatid mites (Acari, Oribatida) are an extraordinarily old and speciose group of chelicerate arthropods that probably originated\\u000a in Silurian times. A high number (?10%) of oribatid mite species reproduces via parthenogenesis, presumably by terminal fusion\\u000a automixis with holokinetic chromosomes and an inverted sequence of meiotic divisions. Several of the old taxa of oribatid\\u000a mites likely have radiated while being parthenogenetic.

  13. Analysis of trichome exudate from mite-resistant geraniums.

    PubMed

    Gerhold, D L; Craig, R; Mumma, R O

    1984-05-01

    Trichome exudate from mite-resistant geraniums (Pelargonium horlorum) was analyzed, principally by mass spectrometry and NMR spectroscopy. The exudate was found to consist of two anacardic acid derivatives,o-pentadecenylsalicylic acid ando-heptadecenylsalicylic acid. Bioassays established a moderate toxicity of these compounds to the two-spotted spider mite,Tetranychus urticae. The production of these compounds in geraniums was correlated with the two complementary dominant genes previously reported for host resistance to spider mites. PMID:24318735

  14. Treatment of sarcoptic mite infestation and mite hypersensitivity in pigs with injectable doramectin.

    PubMed

    Cargill, C; Davies, P; Carmichael, I; Hooke, F; Moore, M

    1996-05-11

    Thirty-two pigs were infested experimentally with Sarcoptes scabiei var suis and allocated randomly to a medicated group (injected intramuscularly with 300 micrograms doramectin/kg) or an unmedicated group (injected intramuscularly with 1 ml saline/33 kg). They were observed daily for 15 minutes for signs of pruritus, and the ear lesions were assessed and skin scrapings examined for mites on days 7, 14, 21 and 28 after treatment. In the 16 pigs treated with doramectin the ear lesions resolved completely within 14 days, no mites were recorded on 15 of them on day 7 or on any of them on days 14, 21 and 28; pruritus was greatly reduced from day 7 onwards (range 0 to 0-62 rubbing episodes per pig per day) and papular skin lesions were absent from 15 of the pigs at slaughter on day 28. In comparison, the ear lesions in the 16 unmedicated pigs failed to resolve in 15 of them. Mites were present on 15 of them at different times during the experiment; the numbers of rubbing episodes ranged from 0.88 to 4.65 per pig per day and all the pigs had papular skin lesions at slaughter. In the unmedicated pigs, both the degree of pruritus and the presence and severity of papular skin lesions at slaughter were greater in those with zero or low mite counts than in those with high mite counts. PMID:8735539

  15. Minor constituents of palm oil

    Microsoft Academic Search

    S. H. Goh; Y. M. Choo; S. H. Ong

    1985-01-01

    Crude palm oil contains about 1% of minor components including carotenoids, tocopherols, sterols, triterpene alcohols, phospholipids,\\u000a glycolipids and terpenic and paraffinic hydrocarbons. The nutritionally important components such as carotenes and tocopherols\\u000a also improve stability of the oil. Although a highly valued product, carotene unfortunately is bleached or destroyed in refining\\u000a because suitable recovery technology is not available. Thermal degradation of

  16. Studies in palm oil crystallization

    Microsoft Academic Search

    B. Jacobsberg; Oh Chuan Ho

    1976-01-01

    The melting and crystallization behaviors of palm oil were examined by nuclear magnetic resonance, differential scanning calorimetry,\\u000a and plasticity measurements and were correlated with composition and chemical characteristics. Fractionation into high melting\\u000a and low melting components is adversely affected by increase in free fatty acids (FFA), diglyceride content, and degree of\\u000a oxidation, and hence, for an oil that is to

  17. Mites associated with stored grain commodities in Benin, West Africa.

    PubMed

    Zannou, Ignace D; Adebo, Habib O; Zannou, Elisabeth; Hell, Kerstin

    2013-12-01

    After insects, mites are the major arthropod pests that inhabit stored agricultural products worldwide. To determine the acarofauna that infests cowpea, maize, paddy rice and sorghum in Benin (West Africa), surveys were conducted in some principal markets (Dantokpa, Glazoue and Parakou) of this country. A total of 555 samples of grains and debris were collected in May and September 2011. More than 56 species belonging to 24 mite families were recorded in the four products. These mite species included predators, parasites, fungivorous, phytophagous and other groups whose feeding habits are not well known. The family Cheyletidae was the most prevalent and the most diverse predatory mite family encountered, in which Cheyletus malaccensis Oudemans was the most abundant species. Several families of mite pests and mites responsible for allergies (Acaridae, Glycyphagidae, Pyroglyphidae, Pyemotidae and Saproglyphidae) were also detected. The three most dominant and frequent species were C. malaccensis, Suidasia nesbitti (Hughes) and Suidasia sp. Statistical analysis showed that densities of these three mite species were higher in Parakou than in Glazoue and Dantokpa, on one hand, and higher in debris than in grains, on the other hand. The densities of S. nesbitti and Suidasia sp. decreased significantly during the dry season, whereas C. malaccensis remained stable throughout the two samplings. Of all grains, sorghum was the least infested with mites. This study shows that in Benin mites are present in stored agricultural products to which they cause serious damage, and may cause various allergies to people. PMID:23793792

  18. Respiratory symptoms in arable farmworkers: role of storage mites.

    PubMed

    Blainey, A D; Topping, M D; Ollier, S; Davies, R J

    1988-09-01

    Storage mites (acarid mites) are related to the house dust mite but are usually found in agricultural environments. They have been shown to cause allergic symptoms in Scottish farmworkers exposed to stored hay, but whether farmworkers who grow and store grain are also at risk is unknown. One hundred and one farmworkers on 22 Essex farms with grain storage facilities (88% of the available workforce) participated in a survey of respiratory symptoms, with skin tests and determination of serum levels of IgE specific for mite species, including storage mites. Of the 101 workers, 21 reported attacks of cough, wheeze, or breathlessness after exposure to stored grain and 15 reported nasal symptoms after grain exposure. Storage mite specific IgE was found in 59% of farmworkers with work related respiratory symptoms, in 60% with work related nasal symptoms, and in only 9% of symptomless farmworkers. Work related respiratory and nasal symptoms were also significantly associated with atopy, and with positive skin test responses and serum IgE specific for Dermatophagoides pteronyssinus. Storage mites were found in grain samples from 16 farms in which grain was sampled, whereas D pteronyssinus was not found in any. The close association between serum storage mite specific IgE and occupational respiratory symptoms suggests that storage mites may be responsible for respiratory symptoms in these Essex farmworkers exposed to grain. PMID:3194876

  19. The role of mites in insect-fungus associations.

    PubMed

    Hofstetter, R W; Moser, J C

    2014-01-01

    The interactions among insects, mites, and fungi are diverse and complex but poorly understood in most cases. Associations among insects, mites, and fungi span an almost incomprehensible array of ecological interactions and evolutionary histories. Insects and mites often share habitats and resources and thus interact within communities. Many mites and insects rely on fungi for nutrients, and fungi benefit from them with regard to spore dispersal, habitat provision, or nutrient resources. Mites have important impacts on community dynamics, ecosystem processes, and biodiversity within many insect-fungus systems. Given that mites are understudied but highly abundant, they likely have bigger, more important, and more widespread impacts on communities than previously recognized. We describe mutualistic and antagonistic effects of mites on insect-fungus associations, explore the processes that underpin ecological and evolutionary patterns of these multipartite communities, review well-researched examples of the effects of mites on insect-fungus associations, and discuss approaches for studying mites within insect-fungus communities. PMID:24188072

  20. Sensitisation to mites in laboratory animal workers with rhinitis

    PubMed Central

    Ruoppi, P; Koistinen, T; Pennanen, S

    2005-01-01

    Aims: To determine the frequency of sensitisation to mites among rhinitic laboratory animal workers and to clarify whether sensitisation could be occupational. Methods: Skin prick tests (SPT) were performed in 40 subjects who were working with laboratory animals in Kuopio University research units and who had been referred to Kuopio University Hospital for work related rhinitis. The SPT panel consisted of three storage mites, two house dust mites, 11 other common environmental airborne allergens, latex, and 2–4 individually relevant laboratory animals. To determine signs of mites in animal facilities, guanine was determined in 22 dust samples taken from feedstuffs or bedding material used for laboratory animals and from rooms where these materials were stored and handled. Results: Positive SPT results were found in 35 out of 40 workers: in 14 for storage mites, four for house dust mites, 25 for other common aeroallergens, as well as positive reactions to laboratory animals in 19 individuals. The guanine test was positive, indicating the presence of mite derived material in 21 out of 22 dust samples. Conclusions: This study suggests that subjects who are occupationally exposed to laboratory animals are also exposed to mite derived allergens. Sensitisation to mites is common and may be work related. PMID:16109817

  1. The Jean Gutierrez spider mite collection

    PubMed Central

    Migeon, Alain

    2015-01-01

    Abstract The family Tetranychidae (spider mites) currently comprises 1,275 species and represents one of the most important agricultural pest families among the Acari with approximately one hundred pest species, ten of which considered major pests. The dataset presented in this document includes all the identified spider mites composing the Jean Gutierrez Collection hosted at the CBGP (Montferrier-sur-Lez, France), gathered from 1963 to 1999 during his career at the Institut de Recherche pour le Développement (IRD). It consists of 5,262 specimens corresponding to 1,564 occurrences (combination species/host plant/date/location) of 175 species. Most specimens were collected in Madagascar and other islands of the Western Indian Ocean, New Caledonia and other islands of the South Pacific and Papuasia. The dataset constitutes today the most important one available on Tetranychidae worldwide.

  2. Temperature preference and respiration of acaridid mites.

    PubMed

    Hubert, J; Pekár, S; Nesvorná, M; Sustr, V

    2010-12-01

    The thermal preferences in a grain mass and respiration at various temperatures in mites (Acari: Acarididae) of medical and economical importance [Acarus siro (L. 1758), Dermatophagoides farinae Hughes 1961, Lepidoglyphus destructor (Schrank 1871), and Tyrophagus putrescentiae (Schrank 1781)] were studied under laboratory conditions. Based on the distribution of mites in wheat, Triticum aestivum L., grain along a thermal gradient from 10 to 40 degrees C, L. destructor, D. farinae, and A. siro were classified as eurythermic and T. putrescentiae as stenothermic. The lowest preferred temperature was found for D. farinae (28 degrees C), followed by A. siro (28.5 degrees C), L. destructor (29.5 degrees C), and T. putrescentiae (31.5 degrees C). The relationship between the respiration rate and the temperature was similar for all four mite species. The highest respiration was found in the range from 31 to 33 degrees C. This is approximately 2 degrees C higher than the preferred temperature of these species. The lower temperature threshold of respiration ranged from 1 to 5 degrees C and the upper threshold ranged from 45 to 48 degrees C. Acclimatization of A. siro to temperature regimes of 5, 15, and 35 degrees C resulted in thermal preferences between 9 and 12 degrees C, 9 and 20 degrees C, and 28 and 35 degrees C, respectively. The respiration rate of acclimatized specimens increased with the temperature, reaching a maximum at 29.0 degrees C for mites acclimatized at 5 and 15 degrees C and a maximum at 33.7 degrees C for those acclimatized at 30 degrees C. PMID:21309251

  3. House Dust Mite and Dust Control

    Microsoft Academic Search

    Susan Pollart; Martin D. Chapman; Thomas A. E. Platts-Mills

    1988-01-01

    Conclusion  The available methods for controling dust mites in houses consist of washing bedding regularly, covering mattresses, and,\\u000a when possible, removing carpets. This leaves the problem of fitted carpets in living rooms, as welt as the problem of sofa\\u000a and chair upholsteries. These can be improved by vacuum cleaning, controling humidity, and perhaps using certain acaricides.\\u000a However, there is no perfect

  4. Common Insect and Mite Pests of Humans

    E-print Network

    Brown, Elizabeth; Troxclair, Noel N.

    2008-09-25

    E-485 9/08 Common Insect and Mite Pests of Humans Wizzie Brown and Noel Troxclair* B *Extension Program Specialist, and Associate Professor and Extension Entomologist, The Texas A&M System Figure 1. Head louse. Photo by Michael Merchant. ites from... baseboards. Although a pest management professional is needed manage bedbugs, some actions can help reduce their populations: ? Thoroughly clean the infested area, paying close attention to cracks and crevices where the bugs may be hiding. ? Vacuum...

  5. Phylogenetic analysis of house dust mites

    Microsoft Academic Search

    Yubao Cui; Cuixiang Gao; Ying Zhou; Peng Zhou; Ming Peng; Yingzi Lin; Jianglong Peng

    2010-01-01

    House dust mites live in house dusts and affect the health of humans. Among the many species, Dermatophagoides farinae, D. pteronyssinus, and Euroglyphus maynei have been found to be commonly associated with Ig-E-mediated allergic diseases. As a result, there is increasing effort to\\u000a develop methods for the diagnosis and treatment of diseases caused by these species. The purpose of the

  6. Guanine and mite allergenicity in house dust.

    PubMed

    Pauli, G; Hoyet, C; Tenabene, A; le Mao, J; Thierry, R; Bessot, J C

    1988-07-01

    Guanine is the major nitrogenous waste product in arachnids. It may serve as an indicator for allergenic mite faecal pellets. The present study assesses the correlation between the mit allergenicity of different house dust (HD) samples and their guanine content. Guanine content in HD samples was evaluated either by the Acarex-Test or determined quantitatively, especially for in-vitro methods. Using intradermal tests in selectively sensitized Dermatophagoides pteronyssinus (Dpt) patients, we evaluated the mite allergenicity of eight extracts obtained from HD samples with varying guanine contents. The weal area appeared to be proportional to the HD samples' guanine content. A three-fold increase in skin reactivity was observed when the guanine content varied from 0.06% to more than 1%. Patients allergic to HD but not to Dpt had no significant reactions with HD extract prepared from a guanine-rich HD sample. For eighteen different HD samples coupled to paper discs, the percentage Dpt RAST binding values obtained with a Dpt-selectively sensitized patient serum pool was correlated with the guanine concentrations of HD samples (P less than 0.01). The potencies of different HD extracts obtained from HD samples that varied in guanine content were also clearly distinguished on histamine-release titration curves. House dust obtained from homes at high altitude or from hospitals was generally guanine free. The HD sample guanine contents in homes where twelve Dpt-sensitized patients experienced symptoms were significantly higher than in homes where these patients were symptom free. The guanine colour test, a quick and easy technique, represents an important new development in indoor environmental investigations. It makes it possible to demonstrate mite faecal exposure and can be used to monitor the effectiveness of mite allergen avoidance measures. PMID:2458199

  7. Immunomodulation of Skin Cytokine Secretion by House Dust Mite Extracts

    PubMed Central

    Arlian, Larry G.; Morgan, Marjorie S.

    2011-01-01

    Background Skin contact with house dust mites may contribute to atopic dermatitis and other skin diseases. We sought to determine if molecules from house dust mites could influence the release of proinflammatory cytokines and chemokines from epidermal keratinocytes and dermal fibroblasts grown in a human skin equivalent (HSE) model. Methods HSEs consisting of an epidermis of keratinocytes with stratum corneum over a dermis of fibroblasts in a collagen matrix were challenged with Dermatophagoides farinae, D. pteronyssinus and Euroglyphus maynei mite extracts. Results HSEs secreted interleukin (IL)-1?, IL-1 receptor antagonist, IL-6, IL-8, cutaneous T cell-attracting chemokine, transforming growth factor-?, granulocyte/macrophage and macrophage colony-stimulating factors and vascular endothelial cell growth factor in response to at least 1 mite extract. Extracts of different mite species stimulated HSEs to release different cytokines. Therefore, extracts of different species contained different molecules or different concentrations of similar molecules. The cytokine release profiles of cells in the HSEs were not the same as for monocultured keratinocytes and fibroblasts. Conclusions Molecules from house dust mites are capable of inducing the release of multiple proinflammatory cytokines and chemokines from epidermal keratinocytes and dermal fibroblasts. Avoiding skin contact with house dust mites would reduce the possibility of mite-induced inflammation in the skin. Therefore, measures to reduce contact with mite molecules such as frequent vacuuming of upholstered furniture and carpets and laundering of clothing and bedding to remove mite molecules and allergens could reduce skin contact with mite molecules and diminish exacerbations of skin inflammation in patients with atopic dermatitis and other skin diseases. PMID:21576987

  8. Acoustic Detection of Insects in Palm Trees

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Commercial-crop and ornamental palm trees serve important functions in tropical and subtropical regions of the world, and considerable precautions are taken each year to identify and control infestations of a variety of different insect pests. Large weevils, including the red palm weevil and the co...

  9. Recovery of carotenoids from palm oil

    Microsoft Academic Search

    C. K. Ooi; Y. M. Choo; S. C. Yap; Y. Basiron; A. S. H. Ong

    1994-01-01

    The carotenoids from palm oil were recovered through a two-stage process involving transesterification of palm oil followed\\u000a by molecular distillation of the ester. The carotenoid fraction contained more than 80,000 ppm carotenoids. ?- and ?-Carotenes\\u000a were the major components. Vitamin E and sterols were also present.

  10. Realising Sustainable Oil Palm Development in Indonesia - Challenges and Opportunities

    Microsoft Academic Search

    Kantor Taman

    Palm oil is used in a vast range of everyday products, including soaps, chocolate bars, ice cream, ready-to- eat meals and margarine. Increasingly, it is being touted as a biofuel. Worldwide demand for palm oil has skyrocketed over the past 25 years, and oil palm plantations now cover an area of 11 million hectares. Global production of palm oil is

  11. Palm Beach County nonprofits get creative, gain By EMILY ROACH

    E-print Network

    Belogay, Eugene A.

    Palm Beach County nonprofits get creative, gain stability By EMILY ROACH Palm Beach Post Staff Writer Updated: 5:47 a.m. Tuesday, Aug. 30, 2011 Posted: 10:26 p.m. Monday, Aug. 29, 2011 Palm Beach. The center had committed six years earlier to moving to West Palm Beach's city hall complex on Clematis

  12. Effect of Palm Oil on Serum Lipid Profile in Rats

    Microsoft Academic Search

    2006-01-01

    Palm oil is considered as plant oil in which two types of cooking oil, palm seed oil and palm oil are derived. Palm oil has almost 50% saturated fatty acid and 50% poly unsaturated fatty acid. It i s considered to be useful due to metabolites products such as prostacycline and antithrombois in cardiovascular disease (C.V.D) and variation in lipoprotein.

  13. Parasitic Mites of Honey Bees: Life History, Implications, and Impact

    Microsoft Academic Search

    Diana Sammataro; Uri Gerson; Glen Needham

    2000-01-01

    The hive of the honey bee is a suitable habitat for diverse mites (Acari), including nonparasitic, omnivorous, and pollen-feeding species, and para- sites. The biology and damage of the three main pest species Acarapis woodi, Varroa jacobsoni, and Tropilaelaps clareae is reviewed, along with detection and control methods. The hypothesis that Acarapis woodiis a recently evolved species is rejected. Mite-associated

  14. An annotated checklist of mites (Arachnida: Acari) of Zambia

    Microsoft Academic Search

    ENALA T. MWASE; ANNE S. BAKER

    Published literature on the mites of Zambia (formerly Northern Rhodesia) is scanty and fragmentary. As a baseline for further work to enhance knowledge of this fauna, an annotated list of the taxa reported to date is presented. Data for 90 species or incompletely identified species (representing four orders, 42 families and 57 genera) are given. The mites originated from vertebrates,

  15. House Dust Mite Hypersensitivity: Morning Dipping and Severity of Wheeze

    Microsoft Academic Search

    C. K. Connolly

    1981-01-01

    Atopic subjects with asthma are frequently hypersensitive to house dust mite (Dermatophagiodes pyteronyssinus). Exaggerated nocturnal or early morning wheezing might occur in these patients, because of exposure to the allergen during the night, particularly in, view of the biphasic response that it produces in airway resistance. This might be of diagnostic value in determining the relevance of house dust mite

  16. Characterization and Immunobiology of House Dust Mite Allergens

    Microsoft Academic Search

    Wayne R. Thomas; Wendy-Anne Smith; Belinda J. Hales; Kristina L. Mills; Richard M. O’Brien

    2002-01-01

    The examination of house dust mite extracts has indicated that over 30 different proteins can induce IgE antibody in patients allergic to the house dust mite. There are however dominant specificities especially the group 1 and 2 allergens which can account for much of the allergenicity of extracts. Of the 19 denominated allergens, the major IgE binding has been reported

  17. Immunomodulation of Skin Cytokine Secretion by House Dust Mite Extracts

    Microsoft Academic Search

    Larry G. Arlian; Marjorie S. Morgan

    2011-01-01

    Background: Skin contact with house dust mites may contribute to atopic dermatitis and other skin diseases. We sought to determine if molecules from house dust mites could influence the release of proinflammatory cytokines and chemokines from epidermal keratinocytes and dermal fibroblasts grown in a human skin equivalent (HSE) model. Methods: HSEs consisting of an epidermis of keratinocytes with stratum corneum

  18. CHOLINESTERASE INHIBITION IN SPIDER MITES SUSCEPTIBLE AND RESISTANT TO ORGANOPHOSPHATE.

    PubMed

    SMISSAERT, H R

    1964-01-10

    Evidence is provided that organophosphate resistance in a strain of spider mites is due to decreased sensitivity of its cholinesterase to organophosphates. The cholinesterase activity of the susceptible strain in vitro was three times that of the resistant strain of mites. PMID:14077543

  19. Oribatid mite biodiversity in agroecosystems: role for bioindication

    Microsoft Academic Search

    Valerie M. Behan-Pelletier

    1999-01-01

    The general ecology, biology, life history, and available sources for identification of oribatid mites (including Astigmata), the most numerically dominant arachnid group in the organic horizons of most soils, is reviewed. I use this information as the basis to evaluate data on their role for bioindication in agroecosystems, with the following conclusions: (a) oribatid mites with their low metabolic rates,

  20. Prenatal Chemosensory Learning by the Predatory Mite Neoseiulus californicus

    PubMed Central

    Peralta Quesada, Paulo C.; Schausberger, Peter

    2012-01-01

    Background Prenatal or embryonic learning, behavioral change following experience made prior to birth, may have significant consequences for postnatal foraging behavior in a wide variety of animals, including mammals, birds, fish, amphibians, and molluscs. However, prenatal learning has not been previously shown in arthropods such as insects, spiders and mites. Methodology/Principal Findings We examined prenatal chemosensory learning in the plant-inhabiting predatory mite Neoseiulus californicus. We exposed these predators in the embryonic stage to two flavors (vanillin or anisaldehyde) or no flavor (neutral) by feeding their mothers on spider mite prey enriched with these flavors or not enriched with any flavor (neutral). After the predators reached the protonymphal stage, we assessed their prey choice through residence and feeding preferences in experiments, in which they were offered spider mites matching the maternal diet (neutral, vanillin or anisaldehyde spider mites) and non-matching spider mites. Predator protonymphs preferentially resided in the vicinity of spider mites matching the maternal diet irrespective of the type of maternal diet and choice situation. Across treatments, the protonymphs preferentially fed on spider mites matching the maternal diet. Prey and predator sizes did not differ among neutral, vanillin and anisaldehyde treatments, excluding the hypothesis that size-assortative predation influenced the outcome of the experiments. Conclusions/Significance Our study reports the first example of prenatal learning in arthropods. PMID:23300897

  1. Review article Model evaluation of methods for Varroa jacobsoni mite

    E-print Network

    Boyer, Edmond

    , because beekeepers want to save the brood. Trapping with drone brood demands fewer brood cells for effective mite control, and destruction of drone brood with trapped mites is common prac- tice. Moreover, preparation of trap-combs with drone brood can be integrated into swarm-prevention techniques and will take

  2. Mite Biodiversity Under the Low Temperature Scanning Electron Microscope

    Technology Transfer Automated Retrieval System (TEKTRAN)

    To date, more than 55,000 mite species have been described and only a few of them have been studied. Some mites are adapted to live deep in soil, others in fresh or sea water, some are on plants, algae, fungi or animals, and others are able to survive in both extreme cold and hot temperatures. The...

  3. New Building, Old Parasite: Mesostigmatid Mites—An Ever-Present Threat to Barrier Rodent Facilities

    Microsoft Academic Search

    Julie Watson

    Mesostigmatid mites are blood-sucking parasitic mites found in wild rodent populations. Periodically they can also become a problem for laboratory rodent colonies, particu- larly when building construction or renovations disturb colonies of commensal (building) rodents that had been act- ing as hosts. Mesostigmatid mites infest both rats and mice and, unlike the more common rodent fur mites (Myobia, Myocoptes, and

  4. Small-cell comb does not control Varroa mites in colonies of honeybees of European origin

    E-print Network

    Small-cell comb does not control Varroa mites in colonies of honeybees of European origin Thomas D size 1. INTRODUCTION The mite Varroa destructor is a new parasite of European honeybees living in North of European honeybees does not receive mite control treatments, the mite popula- tion will grow from just

  5. Components of Honeybee Royal Jelly as Deterrents of the Parasitic Varroa Mite, Varroa destructor

    Microsoft Academic Search

    F. P. Drijfhout; J. Kochansky; S. Lin; N. W. Calderone

    2005-01-01

    The parasitic mite Varroa destructor Anderson & Trueman reproduces on the immature stage of the honeybee, Apis mellifera L. Mites are found more often on drone brood than worker brood and only infrequently on queen brood. We investigated the chemical basis for the low incidence of mites on queen brood. V. destructor mites were deterred by a crude extract of

  6. Exterminator-mites (Acari: Dermanyssidae) on the giant Madagascar hissing-cockroach

    Microsoft Academic Search

    J. A. Yoder

    1997-01-01

    Predation on immature stages of cockroach parasites by adult female hissing-cockroach mites, Gromphadorholaelaps schaeferi (Till), was observed in isolation vials and on actual adult cockroaches, implying that mites benefit the host cockroach by acting as exterminators. Of interest is that effective extermination is linked to this mite's life history pattern and genetic system, and their occurrence as the sole mite

  7. Trichomes and spider-mite webbing protect predatory mite eggs from intraguild predation

    Microsoft Academic Search

    A. Roda; J. Nyrop; M. Dicke; G. English-Loeb

    2000-01-01

    Predaceous arthropods are frequently more abundant on plants with leaves that are pubescent or bear domatia than on plants with glabrous leaves. We explored the hypothesis that for some predatory mites this is because pubescence affords protection from intraguild predation. In laboratory experiments, we tested whether apple leaf pubescence protected Typhlodromus pyri eggs from predation by western flower thrips, Frankliniella

  8. CONTROLLING HOUSE DUST MITES THROUGH VENTILATION: the development of a model of mite response to varying hygrothermal conditions

    Microsoft Academic Search

    D Crowther; T Oreszczyn; S Pretlove; I Ridley; J Horwood; P Cox; B Leung

    There is clear evidence that house dust mite populations in many climatic regions can potentially be controlled by modifying temperature and humidity within dwellings. This paper describes a current multi-disciplinary UK funded research project to develop a predictive model of house dust mite response to varying hygrothermal conditions. The project involves the development of two component models, the first simulating

  9. Biocontrol of persea mite, Oligonychus perseae, with an exotic spider mite predator and an indigenous pollen feeder

    Microsoft Academic Search

    Yonatan Maoz; Shira Gal; Yael Argov; Moshe Coll; Eric Palevsky

    2011-01-01

    To improve the biological control of persea mite (Oligonychus perseae) in Israeli avocado orchards we evaluated two approaches: (1) Augmentative inundative releases in commercial orchards of Neoseiulus californicus, an exotic spider mite predator, and (2) Conservation of Euseius scutalis, the prevalent indigenous phytoseiid predator found in avocado orchards, by pollen provisioning. The latter was done at three spatial scales; leaf

  10. MITE ANTIGEN CONCENTRATIONS IN HOUSE DUST AND THE OCCURRENCE OF WHEEZING IN CHILDREN WITH MITE DUST ALLERGY

    EPA Science Inventory

    We studied the relationship between dust mite antigen concentrations in house dust samples and the occurrence and frequency of wheezing in 58 children with dust mite allergy (wheal > 4 mm. mean diameter in response to a prick test with either D-. farinae or D pteronyssinus antige...

  11. Fuel Conversional Aspects of Palm Oil and Sunflower Oil

    Microsoft Academic Search

    AYHAN DEM?RBA?

    2003-01-01

    There are great differences between palm oil and palm kernel oil in physical and chemical characteristics. Palm oil contains mainly palmitic (16:0) and oleic (18:1) acids, the 2 common fatty acids and about 50% saturated, while palm kernel oil contains mainly lauric acid (12:0) and is more than 89% saturated. Palm is widely grown in Southeast Asia, and 90% of

  12. Induction of Allergic Reactions in Guinea Pigs with Purified House Dust Mite Allergens

    Microsoft Academic Search

    Masaaki Yasue; Toyokazu Yokota; Hirokazu Okudaira; Yasushi Okumura

    1999-01-01

    To establish a guinea pig model for house dust mite allergy with purified mite allergens, we studied the immune response to two major mite allergens, native Der f 1 (nDer f 1) and recombinant Der f 2 (rDer f 2) and crude mite extract in Hartley guinea pigs. Animals were immunized with either mite extract, nDer f 1 or rDer

  13. Possible host-parasite adaptations in honey bees infested by Varroa destructor mites

    Microsoft Academic Search

    Ingemar Fries; Riccardo Bommarco

    2007-01-01

    We investigated Varroa destructor mite population growth in a line of honey bee (Apis mellifera) colonies hat have survived mite infestation for seven years without treatment (Bond colonies), and in a line of colonies\\u000a that had been treated to control the mites (Controls). We investigated if the source of mites affected mite population growth.\\u000a The results showed that the overall

  14. American palm ethnomedicine: A meta-analysis

    PubMed Central

    2009-01-01

    Background Many recent papers have documented the phytochemical and pharmacological bases for the use of palms (Arecaceae) in ethnomedicine. Early publications were based almost entirely on interviews that solicited local knowledge. More recently, ethnobotanically guided searches for new medicinal plants have proven more successful than random sampling for identifying plants that contain biodynamic ingredients. However, limited laboratory time and the high cost of clinical trials make it difficult to test all potential medicinal plants in the search for new drug candidates. The purpose of this study was to summarize and analyze previous studies on the medicinal uses of American palms in order to narrow down the search for new palm-derived medicines. Methods Relevant literature was surveyed and data was extracted and organized into medicinal use categories. We focused on more recent literature than that considered in a review published 25 years ago. We included phytochemical and pharmacological research that explored the importance of American palms in ethnomedicine. Results Of 730 species of American palms, we found evidence that 106 species had known medicinal uses, ranging from treatments for diabetes and leishmaniasis to prostatic hyperplasia. Thus, the number of American palm species with known uses had increased from 48 to 106 over the last quarter of a century. Furthermore, the pharmacological bases for many of the effects are now understood. Conclusions Palms are important in American ethnomedicine. Some, like Serenoa repens and Roystonea regia, are the sources of drugs that have been approved for medicinal uses. In contrast, recent ethnopharmacological studies suggested that many of the reported uses of several other palms do not appear to have a strong physiological basis. This study has provided a useful assessment of the ethnobotanical and pharmacological data available on palms. PMID:20034398

  15. Spatiotemporal distribution of insects and mites in horizontally stored wheat.

    PubMed

    Athanassiou, Christos G; Kavallieratos, Nickolas G; Palyvos, Nickolas E; Sciarretta, Andrea; Trematerra, Pasquale

    2005-06-01

    Samples were taken from a flat storage facility located in central Greece, filled with approximately 45 tons of hard wheat, to assess the spatiotemporal distribution of stored-product insects and mites. The wheat was stored in a 1.5-m-deep bulk from June 2001 until March 2002. The samples were taken with a partitioned grain trier during the entire storage period, at 10-d intervals. The trier samples were examined separately for the upper, medial, and lower 0.5 m of the bulk. The spatial distribution of the insect and mite species found was examined by contour analysis based on the numbers of individuals in the trier samples. Nine insect and 20 mite taxa were found during the sampling period. The most abundant insect species were Tribolium castaneum (Herbst), Cryptolestes ferrugineus (Stephens), and Rhyzopertha dominica (F.); the most abundant mite species were Lepidoglyphus destructor (Schrank), Acarus siro L., and the predator Cheyletus malaccensis Oudemans. The highest population densities for the majority of the insect and mite species were recorded during autumn. The majority of the individuals of the most abundant insect and mite species were found in the upper 0.5 m of the bulk, with the exception of C. malaccensis, which was equally distributed in the upper and medial 0.5 m of the bulk. The spatiotemporal distribution during the entire experimental period was notably varied according to the insect and mite species. PMID:16022339

  16. Phoretic mites identified on Andean hummingbirds (Trochilidae) of Caldas, Colombia.

    PubMed

    López-Orozco, Natalia; Cańón-Franco, William Alberto

    2013-01-01

    Within the bird-plant-mite system, the relationship between hummingbirds, flowers, and mites remains poorly understood. In this study, we evaluated the degree of association between nasal mites and eight species of Andean hummingbirds in Colombia (Amazilia saucerrottei, A. tzacatl, Chalybura buffonii, Chlorostilbon mellisugus, Florisuga mellivora, Glaucis hirsutus, Phaethornis guy and P. striigularis). Over a five-month period (trapping effort 360 hours/month), a total of 178 birds were captured, from which 81 mite specimens were collected and identified as belonging to three genera (Proctolaelaps, Rhinoseius and Tropicoseius) spanning eleven species. This is the first report of its kind from Colombia on the identification of the mite species P. rabulatus, R. luteyni, R. rafinskii, T. berryi, T. colwelli, T. erro and T. uniformis and the first record of P. guy as phoretic host for Proctolaelaps rabulatus. Morphological characteristics (length of the dorsal plate, width of the dorsal plate and setae z5 length) alone failed to distinguish between mite species. The ecologic impact of this relationship on flowers with respect to nectar and pollen availability and the effect of mites on pollination by hummingbirds needs to be determined. PMID:23856724

  17. House dust mite allergy: environment evaluation and disease prevention

    PubMed Central

    Yu, Sheng-Jie; Liao, En-Chih

    2014-01-01

    There are two groups of dust mites, house dust mites (HDMs) and storage mites (SMs), that have been identified in the household environment. Both could induce airway inflammation through activation of innate and adaptive immunity and lead to asthma. In order to monitor environmental dust mite infestation, different methods can be used to detect their presence, such as the use of floating methods, monoclonal antibodies, and nanostructured biosensor. SM could be identified in the storage room, mainly in contaminated food such as mushrooms and corn starch. In HDM-sensitive subjects and mice that were challenged with HDM or SM after sensitization, these mites could up-regulate IgE levels, T helper 2 associated cytokine production and airway hypersensitivity. Different age groups of subjects were sensitized by different species of mites. More subjects above 70 years were sensitized by SM and more subjects below the age of 40 years were sensitized to HDM. Different allergenic components of dust mite extracts, such as Der p 1, Der p 2, could activate innate immunity through activating pattern recognition receptor (PRR) and then lead to allergic inflammation. The best modality to treat HDM allergy is immunomodulation through Treg cells and IgA production. In the recent years, many studies indicated probiotics could increase IgA secretion and the number of Treg cells. However, some studies conducted in adults have contradictory effects in reducing allergic symptoms. Therefore, probiotics confer inconclusive benefits on the allergic symptoms. PMID:25379484

  18. Coincidental intraguild predation by caterpillars on spider mites.

    PubMed

    Shirotsuka, Kanako; Yano, Shuichi

    2012-01-29

    Intraguild predation (IGP) is defined as the killing and eating of prey species by a predator that also can utilize the resources of the prey. It is mainly reported among carnivores that share common herbivorous prey. However, a large chewing herbivore could prey upon sedentary and/or micro herbivores in addition to utilizing a host plant. To investigate such coincidental IGP, we observed the behavioral responses of the polyphagous mite Tetranychus kanzawai Kishida (Acari: Tetranychidae) when its host plant Cayratia japonica (Thunb.) Gagnep. (Vitaceae) was attacked by hornworms, Theretra japonica Boisduval (Sphingidae) and T. oldenlandiae Fabricius (Sphingidae). We also examined an interaction between the oligophagous mite Panonychus citri McGregor (Acari: Tetranychidae) and caterpillars of the swallowtail Papilio xuthus L. (Papilionidae) that share citrus plants as their main food source. Although all T. kanzawai and some active stage P. citri tried to escape from the coincidental IGP, some were consumed together with eggs, quiescent mites, and host plant leaves, suggesting that coincidental IGP occurs on spider mites in the wild. Moreover, neither hornworms nor swallowtail caterpillars distinguished between spider mite-infested and uninfested leaves, suggesting that the mite-infested leaves do not discourage caterpillar feeding. The reasons that the mites have no effective defense against coincidental IGP other than escaping are discussed. PMID:22286142

  19. A rapid survey technique for Tropilaelaps mite (Mesostigmata: Laelapidae) detection.

    PubMed

    Pettis, Jeffery S; Rose, Robyn; Lichtenberg, Elinor M; Chantawannakul, Panuwan; Buawangpong, Ninat; Somana, Weeraya; Sukumalanand, Prachaval; Vanengelsdorp, Dennis

    2013-08-01

    Parasitic Tropilaelaps (Delfinado and Baker) mites are a damaging pest of European honey bees (Apis mellifera L.) in Asia. These mites represent a significant threat if introduced to other regions of the world, warranting implementation of Tropilaelaps mite surveillance in uninfested regions. Current Tropilaelaps mite-detection methods are unsuitable for efficient large scale screening. We developed and tested a new bump technique that consists of firmly rapping a honey bee brood frame over a collecting pan. Our method was easier to implement than current detection tests, reduced time spent in each apiary, and minimized brood destruction. This feasibility increase overcomes the test's decreased rate of detecting infested colonies (sensitivity; 36.3% for the bump test, 54.2% and 56.7% for the two most sensitive methods currently used in Asia). Considering this sensitivity, we suggest that screening programs sample seven colonies per apiary (independent of apiary size) and 312 randomly selected apiaries in a region to be 95% sure of detecting an incipient Tropilaelaps mite invasion. Further analyses counter the currently held view that Tropilaelaps mites prefer drone bee brood cells. Tropilaelaps mite infestation rate was 3.5 +/- 0.9% in drone brood and 5.7 +/- 0.6% in worker brood. We propose the bump test as a standard tool for monitoring of Tropilaelaps mite presence in regions thought to be free from infestation. However, regulators may favor the sensitivity of the Drop test (collecting mites that fall to the bottom of a hive on sticky boards) over the less time-intensive Bump test. PMID:24020263

  20. Angiolymphoid hyperplasia with eosinophilia on the palm.

    PubMed

    Kim, Seong Min; Yoon, Jimi; Yoon, Tae-Jin

    2010-08-01

    Angiolymphoid hyperplasia with eosinophilia (ALHE) is an uncommon dermal angioproliferating tumor, characterized by red to brown papules or nodules on the head and neck, though also occurring in the mouth, trunk, extremities and inguinal area. The palm is a very unusual site for ALHE, and there have been very few cases reported globally thus far. ALHE can be pruritic and painful and histopathologic findings show vascular proliferation with infiltration of eosinophils and lymphocytes in the dermis. Plump endothelial cells protrude into the lumen. We report a case of ALHE occurring at an unusual site, the right palm, in a 62-year-old man, who had suffered from a solitary pinkish-colored, central depressed round hyperkeratotic plaque on his palm for 4 years. On the basis of clinical and histopathologic data, a diagnosis of ALHE was made. To our knowledge, this is the first report of ALHE on the palm in Korean dermatologic literature. PMID:20711280

  1. Angiolymphoid Hyperplasia with Eosinophilia on the Palm

    PubMed Central

    Kim, Seong Min; Yoon, Jimi

    2010-01-01

    Angiolymphoid hyperplasia with eosinophilia (ALHE) is an uncommon dermal angioproliferating tumor, characterized by red to brown papules or nodules on the head and neck, though also occurring in the mouth, trunk, extremities and inguinal area. The palm is a very unusual site for ALHE, and there have been very few cases reported globally thus far. ALHE can be pruritic and painful and histopathologic findings show vascular proliferation with infiltration of eosinophils and lymphocytes in the dermis. Plump endothelial cells protrude into the lumen. We report a case of ALHE occurring at an unusual site, the right palm, in a 62-year-old man, who had suffered from a solitary pinkish-colored, central depressed round hyperkeratotic plaque on his palm for 4 years. On the basis of clinical and histopathologic data, a diagnosis of ALHE was made. To our knowledge, this is the first report of ALHE on the palm in Korean dermatologic literature. PMID:20711280

  2. An ant-associated mesostigmatid mite in Baltic amber.

    PubMed

    Dunlop, Jason A; Kontschán, Jen?; Walter, David E; Perrichot, Vincent

    2014-09-01

    Fossil mesostigmatid mites (Acari: Parasitiformes: Mesostigmata) are extremely rare, and specimens from only nine families, including four named species, have been described so far. A new record of Myrmozercon sp. described here from Eocene (ca 44-49 Myr) Baltic amber represents the first-and so far only-fossil example of the derived, extant family Laelapidae. Significantly, modern species of this genus are habitually myrmecophilous and the fossil mite described here is preserved attached to the head of the dolichoderine ant Ctenobethylus goepperti (Mayr, 1868). It thus offers the oldest unequivocal evidence for an ecological association between mesostigmatid mites and social insects in the order Hymenoptera. PMID:25209198

  3. Gas, dust, and fumes exposure is associated with mite sensitization and with asthma in mite-sensitized adults.

    PubMed

    Bjerg, A; Rönmark, E P; Hagstad, S; Eriksson, J; Andersson, M; Wennergren, G; Torén, K; Ekerljung, L

    2015-05-01

    Occupational exposure to gas, dust, and fumes (GDF) increases the risk of asthma and eczema. We investigated the role of sensitization in the association between GDF and allergic conditions. A population-based sample of 788 adults from the West Sweden Asthma Study completed questionnaires and skin prick tests. After adjustment for confounders, GDF exposure was associated with a doubled risk of sensitization to mites, but not with other allergens. Mite sensitization also modified the effect of GDF on asthma. In mite-sensitized subjects, GDF was associated with physician-diagnosed asthma, adjusted OR 2.9 (1.2-7.2), and with wheeze, OR 2.4 (1.1-5.3). In non-mite-sensitized subjects, the corresponding ORs were 1.1 (0.5-2.6) and 0.6 (0.3-1.3). GDF was independently associated with eczema regardless of mite sensitization, but not with rhinitis. These novel findings suggest that components of GDF may act as adjuvants that facilitate sensitization to mites and that mite-sensitized individuals may be especially susceptible to inhalant occupational exposures. PMID:25640536

  4. In Vitro Conservation of Date Palm Germplasm

    Microsoft Academic Search

    S. A. Bekheet

    \\u000a Date palm (Phoenix dactylifera L.) germplasm is difficult to conserve and store in the form of offshoots or in field collections. Tissue culture technologies\\u000a have had a major impact on the ex situ conservation of plant genetic resources. In vitro culture techniques supplement date palm conservation efforts and have been applied to germplasm collection, preservation\\u000a and rapid clonal multiplication. In

  5. Date Palm Cell and Protoplast Culture

    Microsoft Academic Search

    A. Assani; D. Chabane; H. Shittu; N. Bouguedoura

    \\u000a This chapter describes the current status of cell and protoplast cultures in date palm (Phoenix dactylifera L.). Critically important steps toward plant regeneration from recalcitrant date palm protoplasts have been achieved in the\\u000a recent past. Callus regeneration was achieved in commercial cvs. Deglet Noor, Takerboucht, Barhee and Zaghloul. The use of\\u000a feeder layer was the main factor for inducing cell

  6. Effect of antioxidants on refined palm oil

    Microsoft Academic Search

    C. W. Fritsch; V. E. Weiss; R. H. Anderson

    1975-01-01

    Alkali refined palm oil and hydrogenated cotton-seed oil were stabilized with butylated hydroxytoluene, butylated hydroxyanisole,\\u000a and tertiary butylhydroquinone. Under bulk storage temperatures significant reductions in the peroxide formation of palm oil\\u000a were obtained only with tertiary butyl-hydroquinone. The reduction in peroxide formation with tertiary butylhydroquinone was\\u000a much greater than anticipated from the active oxygen method results. The stability improvement of

  7. Palm oil in margarines and shortenings

    Microsoft Academic Search

    Malcolm L. Duns

    1985-01-01

    Palm oil has become used increasingly as a raw material in soaps, edible fat-based products and confectionary. This paper\\u000a deals specifically with applications in margarines and shortenings. Properties of palm oil are described, indicating both\\u000a the special characteristics that make it suitable for such applications and its limitations. Modification techniques which\\u000a can minimize or eliminate the disadvantages and hence broaden

  8. Biological control of spider mites on grape by phytoseiid mites (Acari: Tetranychidae, Phytoseiidae): emphasis on regional aspects.

    PubMed

    Prischmann, D A; Croft, B A; Luh, H K

    2002-04-01

    Leaf samples were taken from 34 (1998) and 10 (1999) vineyards in five valleys in western Oregon to assess spider mite pests and biological control by predaceous phytoseiid mites. A leaf at a coordinate of every 10 m of border, 5 m into a vineyard, was taken to minimize edge effects; 20 leaves were taken at regular intervals from vineyard centers. Variables recorded at each site included grape variety and plant age, chemicals used, and vegetation next to vineyards. Sites were rated as occurring in agricultural versus riparian settings based on surrounding vegetation types. Multiple linear regressions and a computer genetic algorithm with an information content criterion were used to assess variables that may explain mite abundances. Typhlodromus pyri Scheuten was the dominant phytoseiid mite species and Tetranychus urticae Koch the dominant tetranychid mite species. High levels of T. urticae occurred when phytoseiid levels were low, and low levels of T. urticae were present when phytoseiid levels were high to moderate. T. urticae densities were higher in vineyards surrounded by agriculture, but phytoseiid levels did not differ between agricultural and riparian sites. Phytoseiids had higher densities on vineyard edges; T. urticae densities were higher in centers. Biological control success of pest mites was rated excellent in 11 of 44 vineyards, good in 27, and poor in only six sites. Predaceous mites appeared to be the principal agents regulating spider mites at low levels in sites where pesticides nontoxic to predators were used. Effects of surrounding vegetation, grape variety, growing region, and other factors on mites are discussed. PMID:12020011

  9. Water recycling from palm oil mill effluent (POME) using membrane technology

    Microsoft Academic Search

    Abdul Latif Ahmad; Suzylawati Ismail; Subhash Bhatia

    2003-01-01

    Malaysia is the largest producer and exporter of palm oil. Palm oil processing is carried out in palm oil mills where oil is extracted from a palm oil fruit bunch. Large quantities of water are used during the extraction of crude palm oil from the fresh fruit bunch, and about 50% of the water results in palm oil mill effluent

  10. Nutritional characteristics of sago palm and oil palm in tropical peat soil

    Microsoft Academic Search

    Mina Matsumoto; Mitsuru Osaki; Tanit Nuyim; Apichart Jongskul; Yoshiaki Kitaya; Masaru Urayama; Toshihiro Watanabe; Takeshi Kawamukai; Takuji Nakamura; Chairatna Nilnond; Takuro Shinano; Toshiaki Tadano

    1998-01-01

    To make clear the nutritional characteristics of sago palm (Metroxylon sagu Rottb.) and oil palm (Elaeis guineensin Jacq.) grown in tropical peat soil, minerals concentration, organic compounds concentration, and photo?synthetic rate were estimated, and the obtained results were as follows. Since, the nitrogen (N), phosphorus (P), calcium (Ca), magnesium (Mg), and sodium (Na) concentration in mature leaves and trunk were

  11. Managing Insects and Mite Pests of Texas Sorghum

    E-print Network

    Cronholm, Gregory B.; Knutson, Allen E.; Parker, Roy D.; Pendleton, Bonnie

    2007-06-20

    This is the complete guide for Texas sorghum growers. It covers an integrated approach to managing insect and mite pests to help growers prevent, diagnose and control damaging infestations. This publication offers suggestions for managing 26 insect...

  12. Lantana and Verbena: How to Combat Insect and Mite Pests

    E-print Network

    Mott, Dale; Merchant, Michael E.

    2005-02-21

    Several insect and mite pests attack lantana and verbena, which are perennial ornamental plants found in many Texas landscapes. This publication describes the most common pests and explains how to manage them....

  13. Feather mites of the greater sandhill crane (Grus canadensis tabida)

    USGS Publications Warehouse

    Atyeo, W.T.; Windingstad, Ronald M.

    1979-01-01

    New taxa are described from Grus canadensis tabida: Brephosceles petersoni sp. n. (Alloptidae); Pseudogabucinia reticulata sp. n. (Kramerellidae); Geranolichus canadensis sp. n., and Gruolichus wodashae, gen. et sp. n. (Pterolichidae). Observations on resource partitioning by these mites are given.

  14. Microbiota of Demodex mites from rosacea patients and controls.

    PubMed

    Murillo, Nathalia; Aubert, Jérome; Raoult, Didier

    2014-01-01

    Proliferation of Demodex mites is associated with rosacea. Furthermore, Demodex-associated bacteria were suggested to play a role in the pathogenesis of rosacea. We decided to analyze Demodex microbiota. Mites were collected by standardized skin surface biopsies from patients with erythematotelangiectatic, papulopustular rosacea or from control subjects. The microbiota from each mite was characterized by 16S rRNA clone library approach. The 16S rRNA clone library consisted of 367 clones obtained from 73 extracts originating from 5 samples per study group (ETR, PPR or healthy subjects). A total of 86 species were identified with 36 as Demodex-specific microbiota. In the papulopustular group, proportions of Proteobacteria and Firmicutes increased whereas proportion of Actinobacteria decreased. Here, we report preliminary results on the microbiota of Demodex mites based on a molecular approach showing an unexpected diversity. Differences according to the host status need to be confirmed but open new perspectives for diagnostic of rosacea. PMID:24768927

  15. Modification of House Dust Mite Allergens by Monomethoxypolyethylene Glycol

    Microsoft Academic Search

    H. Mosbech; S. Dreborg; I. Pĺhlman; P. Stahl Skov; I. Steringer; B. Weeke

    1988-01-01

    In animal models, allergen modification by coupling to monomethoxypolyethylene glycol (mPEG) molecules can reduce allergenicity of the extract and makes the allergen capable of suppressing boosted IgE response. To investigate in a human system the degree of attenuation implied by a mPEG modification of a house dust mite (Dermatophagoides pteronyssinus) extract, 55 adults with asthma caused by house dust mites

  16. Sarcoptes scabiei Mites Modulate Gene Expression in Human Skin Equivalents

    PubMed Central

    Morgan, Marjorie S.; Arlian, Larry G.; Markey, Michael P.

    2013-01-01

    The ectoparasitic mite, Sarcoptes scabiei that burrows in the epidermis of mammalian skin has a long co-evolution with its hosts. Phenotypic studies show that the mites have the ability to modulate cytokine secretion and expression of cell adhesion molecules in cells of the skin and other cells of the innate and adaptive immune systems that may assist the mites to survive in the skin. The purpose of this study was to identify genes in keratinocytes and fibroblasts in human skin equivalents (HSEs) that changed expression in response to the burrowing of live scabies mites. Overall, of the more than 25,800 genes measured, 189 genes were up-regulated >2-fold in response to scabies mite burrowing while 152 genes were down-regulated to the same degree. HSEs differentially expressed large numbers of genes that were related to host protective responses including those involved in immune response, defense response, cytokine activity, taxis, response to other organisms, and cell adhesion. Genes for the expression of interleukin-1? (IL-1?) precursor, IL-1?, granulocyte/macrophage-colony stimulating factor (GM-CSF) precursor, and G-CSF precursor were up-regulated 2.8- to 7.4-fold, paralleling cytokine secretion profiles. A large number of genes involved in epithelium development and keratinization were also differentially expressed in response to live scabies mites. Thus, these skin cells are directly responding as expected in an inflammatory response to products of the mites and the disruption of the skin’s protective barrier caused by burrowing. This suggests that in vivo the interplay among these skin cells and other cell types, including Langerhans cells, dendritic cells, lymphocytes and endothelial cells, is responsible for depressing the host’s protective response allowing these mites to survive in the skin. PMID:23940705

  17. Dust mite allergens and asthma: a worldwide problem*

    PubMed Central

    1988-01-01

    After the discovery of house dust mites in 1964 their association with asthma has been reported from many different parts of the world including the developing countries. Two sets of major allergens from mites of the genus Dermatophagoides are now well recognized. The Group I allergens are glycoproteins of relative molecular mass (Mr) 25 000, which show both structural homology and cross-reactivity. The allergen Der p I has been cloned and sequenced confirming the Mr and establishing its nature as a protease. The Group II allergens (Mr 15 000) show even closer homology and cross-reactivity. Specific immunoassays for Group I and Group II allergens, using monospecific antisera and monoclonal antibodies, have been standardized and are suitable for measuring allergen levels in different parts of the world. Measures for reducing the levels of mite allergens in houses include the covering of mattresses, hot washing of bedding, and removal of carpets from bedrooms as well as humidity control, vacuum cleaning, and the use of acaricides in the rest of the house. There is already evidence that these procedures can cause a major improvement in the symptoms of asthma. While provisional standards for both sensitization to mites and also mite allergen exposure can now be recommended, there is an urgent need for controlled studies using protocols demonstrated to reduce mite allergen levels by at least tenfold and for further international collaboration. PMID:3069235

  18. New Wolbachia supergroups detected in quill mites (Acari: Syringophilidae).

    PubMed

    Glowska, Eliza; Dragun-Damian, Anna; Dabert, Miroslawa; Gerth, Michael

    2015-03-01

    Wolbachia is the most abundant intracellular bacterial genus infecting a wide range of arthropods and filarial nematodes. Wolbachia have evolved parasitic, mutualistic and commensal relationships with their hosts but in arthropods generally act as reproductive parasites, inducing a wide range of phenotypic effects such as cytoplasmic incompatibility, parthenogenesis, feminization and male-killing. Up to now, the genus has been divided into 14 supergroups successively named A-O. Here, we describe two new Wolbachia supergroups from syringophilid mites (Acari: Cheyletoidea). These obligatory ectoparasites of birds inhabit the quills of feathers in many avian groups. The species of this family reproduce in a haplodiploid mode sensu arrhenotoky and are usually strongly female-biased. Based on the sequences of four protein-coding genes (ftsZ, gltA and groEL and coxA) and the 16S rRNA we identified strains of three Wolbachia supergroups (F and two distinct, yet undescribed ones) in five quill mite species. Our results suggest that in some cases the distribution of the bacteria can be better correlated with the mite's bird host rather than with mite taxonomy as such. The discovery of two new Wolbachia supergroups not only broadens the knowledge of the diversity of this bacterium but also raises questions about potential effects induced in quill mites and transmission mechanisms of the endosymbionts in this peculiar bacteria-quill mite-bird system. PMID:25541519

  19. Mite elimination--clinical effect on eczema.

    PubMed

    Friedmann, P S; Tan, B B

    1998-01-01

    Allergic reactivity to house-dust mites (HDM) can be detected in patients with atopic eczema by prick and patch test challenge. To determine the clinical relevance of this reactivity, we performed a placebo-controlled, double-blind trial of anti-HDM measures. Active treatment comprised Gortex bags for all the bedding elements, a high-powered vacuum cleaner, and a spray containing benzyl alcohol and tannic acid to kill mites and denature allergens. Placebo treatment was light cotton bags, a cheap vacuum cleaner, and water spray. Forty-eight patients (28 active group) completed the trial, which lasted 6 months. Dust was sampled from the mattress surface and bedroom and living-room carpets before and at monthly intervals after institution of the measures. Dust was weighed and Der p 1 determined by ELISA (ALK). Patients were assessed for area and severity of eczema by a blinded observer. There was a highly significant reduction in bed surface dust - most beds yielded insufficient dust to extract and assay. Carpet Der p 1 levels were reduced to similar minimal levels by both active and placebo treatments (about 250 ng/m2). There were highly significant benefits on the eczema scores, the active treatment being greatly superior to placebo (P< or =0.0006; analysis of covariance). In conclusion, Gortex bed bags were highly effective at containing dust within the bed. This was associated with clinical improvement in most patients with atopic eczema - the biggest improvements were seen in the most severely affected subjects. PMID:10096818

  20. Prey Preference of the Predatory Mite, Amblyseius swirskii between First Instar Western Flower Thrips Frankliniella occidentalis and Nymphs of the Twospotted Spider Mite Tetranychus urticae

    PubMed Central

    Xu, Xuenong; Enkegaard, Annie

    2010-01-01

    The prey preference of polyphagous predators plays an important role in suppressing different species of pest insects. In this study the prey preference of the predatory mite, Amblyseius swirskii (Athias-Henriot) (Acari: Phytoseiidae) was examined between nymphs of the twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) and first instar larvae of the western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), as well as between active and chrysalis spider mite protonymphs and active and chrysalis spider mite deutonymphs. The study was done in the laboratory on bean leaf discs at 25 ± 1° C and 70 ± 5% RH. Amblyseius swirskii had a clear preference for thrips compared to both spider mite protonymphs and deutonymphs. About twice as many thrips as spider mites were consumed. Amblyseius swirskii did not show a preference between active and chrysalis stages of spider mites. PMID:21070175

  1. IPM of the Red Palm Weevil, Rhynchophorus Ferrugineus

    Microsoft Academic Search

    Mohamed Samir Tawfik Abbas; TAWFIK ABBAS

    \\u000a The Red Palm Weevil (RPW) Rhynchophorus ferrugineus is the major destructive insect pest of a broad range of palm trees. Infestation by RPW varies in relation to the height\\u000a and age of palm trees and most likely is restricted to 0–1 m height above soil surface and to palms up to 10 years old. The\\u000a life cycle of the insect

  2. Palm Cove, Australia, 5-10 Aug, 2007 Outrigger in

    E-print Network

    Palm Cove, Australia, 5-10 Aug, 2007 Physics in Space Programme LOFAR Outrigger in Scandinavia EM, Uppsala and LOIS Space Centre, Växjö #12;Bo Thidé IPELS2007., Palm Cove, Australia, 5--10 August, 20072, space physics and lab plasma physics #12;Bo Thidé IPELS2007., Palm Cove, Australia, 5--10 August, 20073

  3. Gingrich Palm Beach County supporters 'disappointed but not discouraged'

    E-print Network

    Belogay, Eugene A.

    Gingrich Palm Beach County supporters 'disappointed but not discouraged' 2012-02-01 17:16:03 PALM BEACH COUNTY, Fla. -- As expected Newt Gingrich lost in Florida by a landslide. The polls predicted of three created a "Palm Beach County for Newt Gingrich 2012" Facebook page in November. Shortly afterwards

  4. Date Palms of Arabia: A Multifunctional Genetic Resource

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Arabia Deserta is a part of the center of origin and constitutes a sizable part of the center of diversity of the date palm (Phoenix dactylifera). Cultivated date palm is closely related to a variable aggregate of wild and feral palms distributed over the southern, warm and dry Middle East as well a...

  5. DATE PALMS OF ARABIA: A MULTIFUNCTIONAL GENETIC RESOURCE [ABSTRACT

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Arabia Deserta is a part of the center of origin and constitutes a sizable part of the center of diversity of the date palm (Phoenix dactylifera). Cultivated date palm is closely related to a variable aggregate of wild and feral palms distributed over the southern, warm and dry Middle East as well a...

  6. Is oil palm the next emerging threat to the Amazon?

    Microsoft Academic Search

    Rhett A. Butler; William F. Laurance

    2009-01-01

    The Amazon Basin appears poised to experience rapid expansion of oil palm agriculture. Nearly half of Amazonia is suitable for oil palm cultivation, and Malaysian corporations are now moving into the region to establish new plantations while the Brazilian government is considering a law that would count oil palm as \\

  7. Performance of a diesel generator fuelled with palm oil

    Microsoft Academic Search

    Silvio C. A. de Almeida; Carlos Rodrigues Belchior; Marcos V. G. Nascimento; Leonardo dos S. R. Vieira; Guilherme Fleury

    2002-01-01

    Pure palm oil may be employed in diesel engines as an alternative fuel. Engine performance and emissions were influenced by basic differences between diesel fuel and palm oils such as mass based heating values, viscosity, density and molecular oxygen content. The high viscosity of palm oil resulted in poor atomisation, carbon deposits, clogging of fuel lines and starting difficulties in

  8. Chemical and physical characteristics of soap made from distilled fatty acids of palm oil and palm kernel oil

    Microsoft Academic Search

    Ainie Kuntom; Hamirin Kifli; Peang-Kean Lim

    1996-01-01

    Manufacture of soaps from distilled fatty acids of palm oil (PO) and palm kernel oil (PK) is a well-established technology\\u000a in Malaysia. Data on quality and characteristics of various blends of PO\\/PK fatty acid-based (palm-based) soaps made in Malaysia\\u000a are not available, however. In view of this, the study described in this paper was undertaken. Eleven blends of palm-based\\u000a bar

  9. ENVIRONMENTAL, ECONOMIC AND ENERGY IMPACTS OF MATERIAL RECOVERY FACILITIES - A MITE PROGRAM EVALUATION

    EPA Science Inventory

    This report documents an evaluation of the environmental, economic, and energy impacts of material recovery facilities (MRFS) conducted under the Municipal Solid Waste Innovative Technology Evaluation (MITE) Program. he MITE Program is sponsored by the U.S. Environmental Protecti...

  10. ENVIRONMENTAL, ECONOMIC, AND ENERGY IMPACTS OF MATERIAL RECOVERY FACILITIES - A MITE PROGRAM EVALUATION

    EPA Science Inventory

    This report documents an evaluation of the environmental, economic, and energy impacts of material recovery facilities (MRFS) conducted under the Municipal Solid Waste Innovative Technology Evaluation (MITE) Program. he MITE Program is sponsored by the U.S. Environmental Protecti...

  11. Watermite Parasitism of Corixidae: Infection Parameters, Larval Mite Growth, Competitive Interaction and Host Response

    E-print Network

    McCarthy, T.K.

    from the largest hosts and from single infections. Intraspecific and interspecific competitionWatermite Parasitism of Corixidae: Infection Parameters, Larval Mite Growth, Competitive parasitism of Corixidae:infection parameters, larval mite growth, competitive interaction and host response P

  12. CONTROL OF RED PALM WEEVIL, RHYNCHOPHORUS FERRUGINEUS OLIVER USING PROPHYLACTIC SPRAYING OF DATE PALMS AND TRUNK INJECTION

    Microsoft Academic Search

    K. M. Azam; S. A. Razvi

    Efficacy of five insecticides, viz., Trichlorphon 80 SP, Aflix (endosulfan + dimethoate) 38.5 EC, dimethoate 40 EC, Marshal (Carbosulfan) 25 EC and Nogos (dichlorvos) 50 EC and was evaluated by spraying the date palms at 0.1% concentration as prophylactic sprays for the control of red palm weevil. All the palms sprayed with dimethoate and Nogos were free of infestation for

  13. A HYDROTHERMAL MODEL FOR PREDICTING HOUSE-DUST MITE RESPONSE TO ENVIRONMENTAL CONDITIONS IN DWELLINGS

    Microsoft Academic Search

    N Bakerl

    House-dust mite antigens are a major contributor to allergic sensitisation. Since temperature and humidity are crucial to house-dust mite physiology, there is considerable interest in reducing mite populations by controlling the indoor environment. A multidisciplinary team of building scientists and entomologists has been formed to develop a prototype hydrothermal model that simulates the dynamic interaction between the mite's micro-environment within

  14. Induced resistance in Solanum dulcamara triggered by the gall mite Aceria cladophthirus (Acari: Eriophyoidea)

    Microsoft Academic Search

    E. Westphal; F. Dreger; R. Bronner

    1991-01-01

    After infestation ofSolanum dulcamara leaves by the eriophyoid gall miteAceria cladophthirus (Nalepa), induced resistance became operative against subsequent eriophyoid attacks. The protective effect, manifested by reduction in plant damage and\\/or mite proliferation, lasted up to 40 days. When the challenger wasA. cladophthirus, the number and size of lesions decreased significantly but mite mortality was not enhanced. When the rust miteThamnacus

  15. Modelling Fungal (Neozygites cf. Floridana) Epizootics in Local Populations of Cassava Green Mites (Mononychellus Tanajoa)

    Microsoft Academic Search

    G. I. Oduor; M. W. Sabelis; R. Lingeman; G. J. De Moraes; J. S. Yaninek

    1997-01-01

    The fungus, Neozygitis cf. floridana is parasitic on the cassava green mite, Mononychellus tanajoa (Bondar) (Acari: Tetranychidae)\\u000a in South America and may be considered for classical biological control of cassava green mites in Africa, where cassava is\\u000a an important subsistence crop, cassava green mites are an imported pest and specific natural enemies are lacking. Spider mites\\u000a generally have a viscous

  16. Transformation of oil palm using Agrobacterium tumefaciens.

    PubMed

    Izawati, Abang Masli Dayang; Parveez, Ghulam Kadir Ahmad; Masani, Mat Yunus Abdul

    2012-01-01

    Transgenic oil palm (Elaeis guineensis Jacq.) plantlets are regenerated after Agrobacterium tumefaciens-mediated transformation of embryogenic calli derived from young leaves of oil palm. The calli are transformed with an Agrobacterium strain, LBA4404, harboring the plasmid pUBA, which carries a selectable marker gene (bar) for resistance to the herbicide Basta and is driven by a maize ubiquitin promoter. Modifications of the transformation method, treatment of the target tissues using acetosyringone, exposure to a plasmolysis medium, and physical injury via biolistics are applied. The main reasons for such modifications are to activate the bacterial virulence system and, subsequently, to increase the transformation efficiency. Transgenic oil palm cells are selected and regenerated on a medium containing herbicide Basta. Molecular analyses revealed the presence and integration of the introduced bar gene into the genome of the transformants. PMID:22351008

  17. Avian Mite Bites Acquired From a New Source--Pet Gerbils

    E-print Network

    Lucky, Andrea

    Avian Mite Bites Acquired From a New Source--Pet Gerbils Report of 2 Cases and Review infested pet gerbils and reviews the der- matologic literature about avian mites. Observations: An 11-year their pet gerbils were found to be infested with Ornithonyssus sylviarum (the northern fowl mite

  18. Nest mites (Pellonyssus reedi) and the reproductive biology of the house finch

    E-print Network

    McGraw, Kevin J.

    Nest mites (Pellonyssus reedi) and the reproductive biology of the house finch (Carpodacus biology of the house finch (Carpodacus mexicanus) in east-central Alabama, U.S.A. Mites were absent from colour of breeding adult male house finches was not correlated with nest-mite levels, nor did it appear

  19. Reducing relative humidity to control the house dust mite Dermatophagoides farinae

    Microsoft Academic Search

    Larry G. Arlian; Jacqueline S. Neal; DiAnn L. Vyszenski-Moher

    1999-01-01

    Background: Indoor relative humidity (RH) is the key factor that determines the survival and population development of the house dust mite Dermatophagoides farinae . Maintaining RH below 50% is one recommendation in a comprehensive plan to reduce house dust mites and mite allergen levels in homes. Even when mean daily RH is reduced below 50%, RH may rise above 50%

  20. THE ROLE OF MITES AND NEMATODES IN EARLY STAGES OF BURIED LITTER DECOMPOSITION IN A DESERT

    Microsoft Academic Search

    PERSEU F. SANTOS; JANICE PHILLIPS; WALTER G. WHITFORD

    1981-01-01

    We studied changes in populations of mites, nematodes, bacteria, and fungi in buried creosote bush litter treated with selected inhibitors. Elimination of microarthropods (primarily tydeid mites) resulted in increased numbers of bacteriophagic nematodes and reduction in numbers of bac- teria; elimination of both nematodes and microarthropods resulted in increased numbers of bacteria compared to untreated controls. Fungal grazing mites, Pyemotidae,

  1. Effect of house dust mite avoidance measures on adult atopic asthma

    Microsoft Academic Search

    A J Dorward; M J Colloff; N S MacKay; C McSharry; N C Thomson

    1988-01-01

    Twenty one adult patients with asthma, with positive skin test responses to the European house dust mite, Dermatophagoides pteronyssinus, were randomly allocated to a control group or to a group applying house dust mite avoidance measures. These included an initial application of liquid nitrogen to mattresses and bedroom carpets to kill the live house dust mite population. Histamine airway responsiveness,

  2. Immune response to flour and dust mites in a United Kingdom bakery

    Microsoft Academic Search

    R D Tee; D J Gordon; S Gordon; B Crook; A J Nunn; A W Musk; K M Venables; A J Taylor

    1992-01-01

    In a study of 279 United Kingdom bakery workers a high prevalence of immunological response to storage mites was found. To determine whether this was the consequence of exposure to storage mites in bakery work, a population of salt packing workers was examined as a comparison group not at occupational risk of exposure to storage mites. Forty two per cent

  3. Influence of spatio-temporal resource availability on mushroom mite diversity.

    PubMed

    Okabe, Kimiko

    2013-11-01

    Although biodiversity in nature is of fundamental importance because it improves the sustainability of ecosystems, communities of microscopic organisms are generally excluded from conservation targets for biodiversity. Here, I hypothesize that mushroom mite species richness is correlated with both spatial (i.e., mushroom size) and temporal (i.e., longevity of fruiting bodies) resource availability. I collected fruiting bodies in an old-growth forest over 4 years to collect mites and insects inhabiting the mushrooms. Mites were collected from 47 % of the fruiting bodies and approximately 60 % of the mite species were collected only once. Mite species richness was significantly correlated with the availability of long-lasting fruiting bodies. For example, bracket fungi contained more mite species than ephemeral fruiting bodies. Insect presence was also correlated with mushroom mite richness, probably as phoretic hosts and food resources for predacious mites. On the other hand, mushroom size seemed to be less important; small fruiting bodies sometimes harbored several mite species. Although mite species richness was correlated with mushroom species richness, mushroom specificity by mites was not clear except for a preference for long-lasting fruiting bodies. Therefore, I suggest that a constant supply of coarse woody debris is crucial for maintaining preferred resources for mushroom mites (e.g., bracket fungi) and their associated insects (mycophilous and possibly saproxylic insects). PMID:23613030

  4. Ultrastructure and bacterial infection of wounds in honey bee ( Apis mellifera ) pupae punctured by Varroa mites

    Microsoft Academic Search

    G. Kanbar; W. Engels

    2003-01-01

    The damage to western honey bee, Apis mellifera, colonies caused by the originally Asian ectoparasitic mite Varroa destructor is mainly a consequence of the infestation of host bee pupae. In the capped brood cell, female mites puncture the host's integument at preferred sites in order to suck haemolymph. Due to repeated feeding by the mother mite and her progeny, these

  5. Pollen availability for predaceous mites on apple: spatial and temporal heterogeneity

    Microsoft Academic Search

    J. A. Addison; J. M. Hardman; S. J. Wilde

    2000-01-01

    It has been suggested that an abundance of alternate food early in the spring may be critical to the ability of generalist predaceous mites to suppress spider mite pests. One alternate food that is typically very abundant in spring is wind-dispersed pollen. Here we investigate, at several spatial scales, the heterogeneity in the availability of pollen to predaceous mites on

  6. Leaf pubescence and two-spotted spider mite webbing influence phytoseiid behavior and population density

    Microsoft Academic Search

    A. Roda; J. Nyrop; G. English-Loeb; M. Dicke

    2001-01-01

    Phytoseiid mites, both in agricultural and natural systems, can play an important role in the regulation of herbivorous mites. Host plant traits, such as leaf pubescence, may influence the dynamics between predator and prey. In this study, we examined the influence of leaf surface characteristics (leaf pubescence and two-spotted spider mite webbing) on the behavior of two species of predatory

  7. A PRELIMINARY INVESTIGATION OF CUES USED BY MESOSTIGMATIC MITES TO LOCATE THEIR PASSALID BEETLE HOSTS

    Microsoft Academic Search

    Sarah M. Satterlee; Norman J. Fashing

    Four species of mesostigmatic mites associated with the passalid beetle Odontotaenius disjunctus (Illiger) (Coleoptera : Passalidae) were tested to define the cues used for host location. When placed in a free- choice disk olfactometer, mites were attracted to vials containing passalid beetles with which they had no physical contact. Mites were also attracted to vials from which a passalid beetle

  8. Engorgement success of parasitic mites on adult sexes of the colour polymorphic mountain stone weta

    Microsoft Academic Search

    T. Robb; M. R. Forbes; I. G. Jamieson

    2004-01-01

    In this study, the prevalence and intensity of the ectoparasitic mite Wetapolipus ja?miesoni was examined on two colour morphs of the mountain stone weta Hemideina maori, collected from the Rock and Pillar Range in the province of Otago, New Zealand. We scored success of mites by identifying whether mites were alive or dead on hosts. We determined whether these indices

  9. Are demodex mites principal, conspirator, accomplice, witness or bystander in the cause of rosacea?

    PubMed

    Chen, WenChieh; Plewig, Gerd

    2015-04-01

    As the only permanent human ectoparasite, the role of human Demodex mites in health and diseases remains largely unclarified. In view of the ecological interaction between organisms of two different species, a type of commensalism between Demodex mites and humans (the former benefit, the latter unaffected) is most likely, while parasitism occurs temporarily and spatially in the diseased state (the former benefit, the latter harmed). As part of normal skin microbiota, the causal role of Demodex mites in the initiation of rosacea can neither fulfill the classical Henle-Koch's principal nor the advanced criteria proposed by Fredericks and Relman for molecular detection of non-cultivatable microorganisms. Epidemiological analysis using Hill's criteria fails to support the causative role of Demodex mites in rosacea regarding the strength of association, specificity and temporality of association, biological gradient and plausibility as well as clinical coherence, therapeutic experimentation and medical analogy. In application of Rothman's sufficient cause model to evaluate the contribution of Demodex mites to rosacea on a population basis, Demodex mites can be regarded as a non-necessary, non-sufficient causal factor for certain forms of rosacea. Further strategies to dissect the association between Demodex mites and rosacea may include studying the possible existence of more virulent forms of mites with a higher pathogenicity, the endosymbiotic bacteria in certain life periods of mites, the interactions between mites and human hosts or between mites and environment, and to set up ex vivo culture models for Demodex mites. PMID:25666117

  10. DURATION AND SPREAD OF AN ENTOMOPATHOGENIC FUNGUS USED TO TREAT VARROA MITES IN HONEYBEE HIVES

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A strain of Beauveria bassiana isolated from varroa mites was used to treat bees against varroa mites in southern France. Fungal treatment was associated with a considerable increase in the percentage of infected varroa mites over baseline levels in two field experiments. The percentage of infecte...

  11. Anatomical Injury Induced by the Eriophyid Mite Aceria anthocoptes on the Leaves of Cirsium arvense

    Microsoft Academic Search

    Dragana Rancic; Branka Stevanovic; Radmila Petanovi?; Biljana Magud; Ivo Tosevski; André Gassmann

    2006-01-01

    Anatomical injury of the leaves of the invasive species, Cirsium arvense (L.) Scop., caused by the eriophyid mite Aceria anthocoptes (Nal.), which is the only eriophyid mite that has been recorded on C. arvense worldwide, is described. The injury induced by the mite feeding on the leaves of C. arvense results in visible russeting and bronzing of the leaves. Other

  12. The presence of eriophyid mites on native and weed Cirsium species in North America

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Aceria anthocoptes is an eriophyid mite that is known to feed on Canada thistle (Cirsium arvense). While this mite species has been considered to be host specific, a detailed evaluation of its host range has yet to be determined. To assess the risks associated with using this mite as a biological ...

  13. UrbanSolutionsCenter Insect and Mite Resistance in Zoysiagrass for Urban Landscapes

    E-print Network

    UrbanSolutionsCenter Insect and Mite Resistance in Zoysiagrass for Urban Landscapes Background has relied extensively on pesticides for control of insect and mite pests. This `quick fix' has to the development of resistance to many pesticides as these insects and mites were continually exposed and developed

  14. Selected Factors Influenceing the Abundance of Banks Grass Mite in Sorghum.

    E-print Network

    Kattes, David H.; Teetes, George L.

    1978-01-01

    . The 10 rows were located 33.5 m into the field from the west side. Mite COU@S were obtained from 10 randomly se1ected pb hm W the parathion-treated area and the surroutiding check. Active stages of mites and mite eggs were counted seprrratdy, Couws...

  15. Quality assessment of palm products upon prolonged heat treatment.

    PubMed

    Tarmizi, Azmil Haizam Ahmad; Lin, Siew Wai

    2008-01-01

    Extending the frying-life of oils is of commercial and economic importance. Due to this fact, assessment on the thermal stability of frying oils could provide considerable savings to the food processors. In this study, the physico-chemical properties of five palm products mainly palm oil, single-fractionated palm olein, double-fractionated palm olein, red palm olein and palm-based shortening during 80 hours of heating at 180 degrees C were investigated. Heating properties of these products were then compared with that of high oleic sunflower oil, which was used as reference oil. The indices applied in evaluating the quality changes of oils were free fatty acid, smoke point, p-anisidine value, tocols, polar and polymer compounds. Three palm products i.e. palm oil, single-fractionated palm olein and double-fractionated palm olein were identified to be the most stable in terms of lower formation of free fatty acid, polar and polymer compounds as well as preserving higher smoke point and tocols content compared to the other three oils. The low intensity of hydrolytic and oxidative changes due to prolonged heating, suggests that these palm products are inherently suitable for frying purposes. PMID:19001776

  16. Repeatability of Feather Mite Prevalence and Intensity in Passerine Birds

    PubMed Central

    Diaz-Real, Javier; Serrano, David; Pérez-Tris, Javier; Fernández-González, Sofía; Bermejo, Ana; Calleja, Juan A.; De la Puente, Javier; De Palacio, Diana; Martínez, José L.; Moreno-Opo, Rubén; Ponce, Carlos; Frías, Óscar; Tella, José L.; Mřller, Anders P.; Figuerola, Jordi; Pap, Péter L.; Kovács, István; Vágási, Csongor I.; Meléndez, Leandro; Blanco, Guillermo; Aguilera, Eduardo; Senar, Juan Carlos; Galván, Ismael; Atiénzar, Francisco; Barba, Emilio; Cantó, José L.; Cortés, Verónica; Monrós, Juan S.; Piculo, Rubén; Vögeli, Matthias; Borrŕs, Antoni; Navarro, Carlos; Mestre, Alexandre; Jovani, Roger

    2014-01-01

    Understanding why host species differ so much in symbiont loads and how this depends on ecological host and symbiont traits is a major issue in the ecology of symbiosis. A first step in this inquiry is to know whether observed differences among host species are species-specific traits or more related with host-symbiont environmental conditions. Here we analysed the repeatability (R) of the intensity and the prevalence of feather mites to partition within- and among-host species variance components. We compiled the largest dataset so far available: 119 Paleartic passerine bird species, 75,944 individual birds, ca. 1.8 million mites, seven countries, 23 study years. Several analyses and approaches were made to estimate R and adjusted repeatability (Radj) after controlling for potential confounding factors (breeding period, weather, habitat, spatial autocorrelation and researcher identity). The prevalence of feather mites was moderately repeatable (R?=?0.26–0.53; Radj?=?0.32–0.57); smaller values were found for intensity (R?=?0.19–0.30; Radj?=?0.18–0.30). These moderate repeatabilities show that prevalence and intensity of feather mites differ among species, but also that the high variation within species leads to considerable overlap among bird species. Differences in the prevalence and intensity of feather mites within bird species were small among habitats, suggesting that local factors are playing a secondary role. However, effects of local climatic conditions were partially observed for intensity. PMID:25216248

  17. A rice Stowaway MITE for gene transfer in yeast.

    PubMed

    Fattash, Isam; Bhardwaj, Priyanka; Hui, Caleb; Yang, Guojun

    2013-01-01

    Miniature inverted repeat transposable elements (MITEs) lack protein coding capacity and often share very limited sequence similarity with potential autonomous elements. Their capability of efficient transposition and dramatic amplification led to the proposition that MITEs are an untapped rich source of materials for transposable element (TE) based genetic tools. To test the concept of using MITE sequence in gene transfer, a rice Stowaway MITE previously shown to excise efficiently in yeast was engineered to carry cargo genes (neo and gfp) for delivery into the budding yeast genome. Efficient excision of the cargo gene cassettes was observed even though the excision frequency generally decreases with the increase of the cargo sizes. Excised elements insert into new genomic loci efficiently, with about 65% of the obtained insertion sites located in genes. Elements at the primary insertion sites can be remobilized, frequently resulting in copy number increase of the element. Surprisingly, the orientation of a cargo gene (neo) on a construct bearing dual reporter genes (gfp and neo) was found to have a dramatic effect on transposition frequency. These results demonstrated the concept that MITE sequences can be useful in engineering genetic tools to deliver cargo genes into eukaryotic genomes. PMID:23704977

  18. A Rice Stowaway MITE for Gene Transfer in Yeast

    PubMed Central

    Fattash, Isam; Bhardwaj, Priyanka; Hui, Caleb; Yang, Guojun

    2013-01-01

    Miniature inverted repeat transposable elements (MITEs) lack protein coding capacity and often share very limited sequence similarity with potential autonomous elements. Their capability of efficient transposition and dramatic amplification led to the proposition that MITEs are an untapped rich source of materials for transposable element (TE) based genetic tools. To test the concept of using MITE sequence in gene transfer, a rice Stowaway MITE previously shown to excise efficiently in yeast was engineered to carry cargo genes (neo and gfp) for delivery into the budding yeast genome. Efficient excision of the cargo gene cassettes was observed even though the excision frequency generally decreases with the increase of the cargo sizes. Excised elements insert into new genomic loci efficiently, with about 65% of the obtained insertion sites located in genes. Elements at the primary insertion sites can be remobilized, frequently resulting in copy number increase of the element. Surprisingly, the orientation of a cargo gene (neo) on a construct bearing dual reporter genes (gfp and neo) was found to have a dramatic effect on transposition frequency. These results demonstrated the concept that MITE sequences can be useful in engineering genetic tools to deliver cargo genes into eukaryotic genomes. PMID:23704977

  19. Acaricidal Activity of Eugenol Based Compounds against Scabies Mites

    PubMed Central

    Pasay, Cielo; Mounsey, Kate; Stevenson, Graeme; Davis, Rohan; Arlian, Larry; Morgan, Marjorie; Vyszenski-Moher, DiAnn; Andrews, Kathy; McCarthy, James

    2010-01-01

    Backgound Human scabies is a debilitating skin disease caused by the “itch mite” Sarcoptes scabiei. Ordinary scabies is commonly treated with topical creams such as permethrin, while crusted scabies is treated with topical creams in combination with oral ivermectin. Recent reports of acaricide tolerance in scabies endemic communities in Northern Australia have prompted efforts to better understand resistance mechanisms and to identify potential new acaricides. In this study, we screened three essential oils and four pure compounds based on eugenol for acaricidal properties. Methodology/Principal Findings Contact bioassays were performed using live permethrin-sensitive S. scabiei var suis mites harvested from pigs and permethrin-resistant S. scabiei var canis mites harvested from rabbits. Results of bioassays showed that clove oil was highly toxic against scabies mites. Nutmeg oil had moderate toxicity and ylang ylang oil was the least toxic. Eugenol, a major component of clove oil and its analogues –acetyleugenol and isoeugenol, demonstrated levels of toxicity comparable to benzyl benzoate, the positive control acaricide, killing mites within an hour of contact. Conclusions The acaricidal properties demonstrated by eugenol and its analogues show promise as leads for future development of alternative topical acaricides to treat scabies. PMID:20711455

  20. Sensory conduction from digit to palm and from palm to wrist in the carpal tunnel syndrome

    PubMed Central

    Buchthal, Fritz; Rosenfalck, Annelise

    1971-01-01

    In normal subjects the maximum and minimum conduction velocity along sensory nerve was the same from digit to palm and from palm to wrist. Severe slowing from palm to wrist in patients with the carpal tunnel syndrome was often associated with only slight slowing from digit to palm. The distal slowing is attributed to a reversible constriction of nerve fibres, an assumption supported by the recovery in distal conduction velocity as early as two and a half months after decompression. The sensory velocity from wrist to elbow was normal or supernormal, whereas the motor velocity was often slightly decreased. The exclusion of the normal segment of the median nerve distal to the flexor retinaculum made it possible to demonstrate abnormalities across the flexor retinaculum in patients with clinical signs of carpal tunnel syndrome in whom distal motor latency and sensory conduction from digit to wrist were normal. PMID:5571311

  1. A novel bacterial disease of the predatory mite Phytoseiulus persimilis: disease syndrome, disease transmission and pathogen isolation

    Microsoft Academic Search

    C. Schütte

    2006-01-01

    The predatory mite Phytoseiulus persimilis Athias-Henriot (Acari, Phytoseiidae) is a specialist predator of spider mites. Since more than three decades P. persimilis has been successfully applied worldwide in biological control of the two-spotted spider mite Tetranychus urticae Koch (Acari, Tetranychidae) in several greenhouse and field crops. The importance of P. persimilis and other predatory mites in integrated pest control has

  2. Interactions among phytophagous mites, and introduced and naturally occurring predatory mites, on strawberry in the UK.

    PubMed

    Fitzgerald, Jean; Pepper, Nicola; Easterbrook, Mike; Pope, Tom; Solomon, Mike

    2007-01-01

    In choice test experiments on strawberry leaf disc arenas the phytoseiid mites Neoseiulus californicus and N. cucumeris were more effective than Typhlodromus pyri as predators of the phytophagous mites Tetranychus urticae and Phytonemus pallidus. There were no preferences shown for either prey by any of these predators. In multiple predator leaf disc experiments both Phytoseiulus persimilis and N. cucumeris significantly reduced numbers of T. urticae eggs and active stages; this effect was seen when the two species were present alone or in combination with other predator species. Neoseiulus californicus was less effective at reducing T. urticae numbers, and T. pyri was not effective; no interaction between predator species was detected in these experiments. When T. urticae alone was present as prey on potted plants, P. persimilis and N. californicus were the only phytoseiids to significantly reduce T. urticae numbers. These two predator species provided effective control of T. urticae when P. pallidus was also present; however, none of the predators reduced numbers of P. pallidus. There were no significant negative interactions when different species of predators were present together on these potted plants. In field experiments, releases of both P. persimilis and N. cucumeris significantly reduced T. urticae numbers. However, there was a significant interaction between these predator species, leading to poorer control of T. urticae when both species were released together. These results show the importance of conducting predator/prey feeding tests at different spatial scales. PMID:17713859

  3. The effect of natural and synthetic antioxidants on the oxidative stability of palm diesel

    Microsoft Academic Search

    Yung Chee Liang; Choo Yuen May; Cheng Sit Foon; Ma Ah Ngan; Chuah Cheng Hock; Yusof Basiron

    2006-01-01

    Crude and distilled palm oil methyl esters conveniently known as palm diesel have been successfully evaluated as diesel substitute. Crude palm oil methyl esters are produced from transesterification of crude palm oil with minor components such as carotenes and vitamin E still intact and they are reddish in colour. The distilled palm oil methyl esters are obtained after the recovery

  4. Physico-chemical properties of various palm-based diacylglycerol oils in comparison with their corresponding palm-based oils.

    PubMed

    Saberi, Amir Hossein; Kee, Beh Boon; Oi-Ming, Lai; Miskandar, Mat Sahri

    2011-08-01

    Palm-based diacylglycerol (P-DAG) oils were produced through enzymatic glycerolysis of palm kernel oil (PKO), palm oil (PO), palm olein (POL), palm mid fraction (PMF) and palm stearin (PS). High purity DAG (83-90%, w/w) was obtained and compared to palm-based oils (P-oil) had significantly (P<0.05) different fatty acid composition (FAC), iodine value (IV) and slip melting point (SMP). Solid fat content (SFC) profiles of P-DAG oils as compared to P-oils had less steep curves with lower SFC at low temperature range (5-10°C) and the higher complete melting temperatures. Also, P-DAG oils in contrast with P-oils showed endothermic as well as exothermic peaks with higher transition temperatures and significantly (P<0.05) higher crystallisation onsets, heats of fusion, and heats of crystallisation. Crystal forms for P-DAG oils were mostly in the ? form. PMID:25214093

  5. Erythema Palmare Hereditarium (‘Red Palms’, ‘Lane's Disease’)

    PubMed Central

    Langenauer, Janine

    2014-01-01

    Erythema palmare hereditarium is a very rare, benign alteration of the skin which can be found mostly on the palms and soles. The anomaly is characterized by a distinctive, extensive, sharply demarcated redness. This report presents a patient with erythema palmare hereditarium. PMID:25493079

  6. Evaluation of the Sabal Palm Laboratory Center.

    ERIC Educational Resources Information Center

    Martinez, Carlos, Jr.

    The Sabal Palm Elementary School in Miami, Florida, cooperated with Florida International University to develop three innovative language programs: (1) Spanish, employing a modified immersion technique for kindergarten and first and second grades; (2) Latin, emphasizing the Latin origin of English for grades five and six; and (3) Shakespeare's…

  7. Road Through Palm Savannah in Pantanal

    USGS Multimedia Gallery

    Seasonally flooded palm savannah near the Rio Negro river at the end of the wet season. Located near RAMSAR site and Rio Negro National Park in the Pantanal ecoregion, near the border between Paraguay and Bolivia. This region, situated in the extreme northeastern corner of western Paraguay and exten...

  8. Sago (Metroxylon sagu Rottboll), the Forgotten Palm

    Microsoft Academic Search

    Tek-Ann Chew; Mohd. Ghazali bin Mohayidin

    1999-01-01

    Sago (Metroxylon sagu Rottboll) is a remarkably hardy plant that is indigenous to South East Asia. This palm thrives in waterlogged, acidic soils where few other plants survive. Sago is an important source of carbohydrates for the local inhabitants and is the crop par excellence for sustainable agriculture. However, owing to the introduction of more profitable crops like rice and

  9. Mite-specific induction of interleukin-2 receptor on T lymphocytes from children with mite-sensitive asthma: Modified immune response with immunotherapy

    Microsoft Academic Search

    Motoki Bonno; Takao Fujisawa; Kousei Iguchi; Yukinori Uchida; Hitoshi Kamiya; Yoshihiro Komada; Minoru Sakurai

    1996-01-01

    BACKGROUND: The efficacy of immunotherapy is still controversial. To elucidate the mechanisms of immunotherapy, we studied mite-specific induction of IL-2 receptor (IL-2R) expression on T lymphocytes from children with mite-sensitive asthma. METHODS: Peripheral blood mononuclear cells were obtained from 28 children with mite-sensitive asthma: 13 had never received house dust immunotherapy (nonimmunotherapy group), 15 had been receiving house dust immunotherapy

  10. Field study on the efficacy of an extract of neem seed (Mite Stop®) against the red mite Dermanyssus gallinae naturally infecting poultry in Egypt

    Microsoft Academic Search

    Fathy Abdel-Ghaffar; Hassan M. Sobhy; Saleh Al-Quraishy; Margit Semmler

    2008-01-01

    Infestations with the poultry red mite Dermanyssus gallinae represent a major ectoparasite problem in poultry and affects egg and meat production worldwide. The effects of the neem\\u000a seed product Mite-Stop® against the red poultry mite were investigated. Five primitive poultry farms in two small villages\\u000a in the Nile Delta and Giza district were selected for the study. The neem extract

  11. Analyses of Hypomethylated Oil Palm Gene Space

    PubMed Central

    Jayanthi, Nagappan; Mohd-Amin, Ab Halim; Azizi, Norazah; Chan, Kuang-Lim; Maqbool, Nauman J.; Maclean, Paul; Brauning, Rudi; McCulloch, Alan; Moraga, Roger; Ong-Abdullah, Meilina; Singh, Rajinder

    2014-01-01

    Demand for palm oil has been increasing by an average of ?8% the past decade and currently accounts for about 59% of the world's vegetable oil market. This drives the need to increase palm oil production. Nevertheless, due to the increasing need for sustainable production, it is imperative to increase productivity rather than the area cultivated. Studies on the oil palm genome are essential to help identify genes or markers that are associated with important processes or traits, such as flowering, yield and disease resistance. To achieve this, 294,115 and 150,744 sequences from the hypomethylated or gene-rich regions of Elaeis guineensis and E. oleifera genome were sequenced and assembled into contigs. An additional 16,427 shot-gun sequences and 176 bacterial artificial chromosomes (BAC) were also generated to check the quality of libraries constructed. Comparison of these sequences revealed that although the methylation-filtered libraries were sequenced at low coverage, they still tagged at least 66% of the RefSeq supported genes in the BAC and had a filtration power of at least 2.0. A total 33,752 microsatellites and 40,820 high-quality single nucleotide polymorphism (SNP) markers were identified. These represent the most comprehensive collection of microsatellites and SNPs to date and would be an important resource for genetic mapping and association studies. The gene models predicted from the assembled contigs were mined for genes of interest, and 242, 65 and 14 oil palm transcription factors, resistance genes and miRNAs were identified respectively. Examples of the transcriptional factors tagged include those associated with floral development and tissue culture, such as homeodomain proteins, MADS, Squamosa and Apetala2. The E. guineensis and E. oleifera hypomethylated sequences provide an important resource to understand the molecular mechanisms associated with important agronomic traits in oil palm. PMID:24497974

  12. Response of soil mites to organic cultivation in an ultisol in southeast Brazil.

    PubMed

    Badejo, M Adetola; De Aquino, Adriana Maria; De-Polli, Helvecio; Correia, Maria Elizabeth Fernandes

    2004-01-01

    Soil-dwelling mites of four plots under organic management were investigated in April and December 1998 and in December 1999. Their populations were compared with mite populations in a pasture and forest in the vicinity. It was observed that there was always an initial reduction in the populations of soil mites and in the activity of the epigeic forms whenever a plot was opened up and disturbed mechanically in preparation for cultivation, irrespective of previous organic inputs. With time, the densities and activities of mites recovered under organic management. The uropodine and oribatid mites in particular benefited more from organic management than gamasine and actinedid mites. Uropodine mites increased tremendously under banana where there was fresh cow dung manure. Oribatid mite species Nothrus seropedicalensis and Archegozetes magnus were dominant in organic plots where the soil was moist and temperatures were lower than the ambient. Protoribates rioensis was dominant in organic plots where the soil was drier and temperatures were higher than the ambient. Galumna was the most active oribatid taxon on the floor of all plots, with the highest activity recorded under maracuja and in pasture plots. The results suggest that while densities and activities of soil mites increased in the organic plots, the community structure and recruitment period of oribatid mites were altered. Oribatid mite diversity was higher in the organic plots than in the pasture but lower than in the forest, where Belba sp. and many Eremobelboid brachypiline genera were present, but absent in the organic plots and pasture. PMID:15651531

  13. Feather mites (Acari, Astigmata) from Azorean passerines (Aves, Passeriformes): lower species richness compared to European mainland

    PubMed Central

    Rodrigues, Pedro; Mironov, Sergey; Sychra, Oldrich; Resendes, Roberto; Literak, Ivan

    2015-01-01

    Ten passerine species were examined on three islands of the Azores (North Atlantic) during 2013 and 2014 in order to identify their feather mite assemblages. We recorded 19 feather mite species belonging to four families of the superfamily Analgoidea (Analgidae, Proctophyllodidae, Psoroptoididae and Trouessartiidae). A high prevalence of feather mite species was recorded on the majority of the examined host species. Only three passerine species (Sylvia atricapilla, Regulus regulus and Serinus canaria) presented the same full complex of mite species as commonly occurs in the plumage of their closest relatives in continental Europe. Passer domesticus presented the same limited fauna of feather mites living in the plumage as do its co-specifics in continental Europe. Carduelis carduelis bears the same feather mite species as do most of its continental populations in Europe, but it lacks one mite species occurring on this host in Egypt. Turdus merula, Pyrrhula murina and Fringilla coelebs are missing several mite species common to their continental relatives. This diminution could be explained by the founder effect, whereby a limited number of colonizing individuals did not transport the full set of feather mite species, or by the extinction of some mite species after initially having reached the Azores. The only individual of Motacilla cinerea sampled in this study presented a new host record for the mite species Trouessartia jedliczkai. PMID:25665827

  14. Feather mites (Acari, Astigmata) from Azorean passerines (Aves, Passeriformes): lower species richness compared to European mainland.

    PubMed

    Rodrigues, Pedro; Mironov, Sergey; Sychra, Oldrich; Resendes, Roberto; Literak, Ivan

    2015-01-01

    Ten passerine species were examined on three islands of the Azores (North Atlantic) during 2013 and 2014 in order to identify their feather mite assemblages. We recorded 19 feather mite species belonging to four families of the superfamily Analgoidea (Analgidae, Proctophyllodidae, Psoroptoididae and Trouessartiidae). A high prevalence of feather mite species was recorded on the majority of the examined host species. Only three passerine species (Sylvia atricapilla, Regulus regulus and Serinus canaria) presented the same full complex of mite species as commonly occurs in the plumage of their closest relatives in continental Europe. Passer domesticus presented the same limited fauna of feather mites living in the plumage as do its co-specifics in continental Europe. Carduelis carduelis bears the same feather mite species as do most of its continental populations in Europe, but it lacks one mite species occurring on this host in Egypt. Turdus merula, Pyrrhula murina and Fringilla coelebs are missing several mite species common to their continental relatives. This diminution could be explained by the founder effect, whereby a limited number of colonizing individuals did not transport the full set of feather mite species, or by the extinction of some mite species after initially having reached the Azores. The only individual of Motacilla cinerea sampled in this study presented a new host record for the mite species Trouessartia jedliczkai. PMID:25665827

  15. [The tropical rat mite Ornithonyssus bacoti attacks humans in Iceland.

    PubMed

    Skírnisson, Karl

    2001-12-01

    In the summer of 2001 the obligate, intermittent tropical rat mite Ornithonyssus bacoti attacked humans in an Icelandic household where infected Mongolian gerbils (Meriones unguiculatus), bought in a local pet shop, had been kept for few months. After a rapid proliferation the mite started attacking the humans living in the house. A boy sharing room with the pets suffered from extensive dermatitis. Optimal conditions for O. bacoti are at 24-26 degrees C and a relative humidity of 47%. Similar conditions frequently occur indoors in Icelandic premises. Therefore, if O. bacoti has been noticed indoors, necessary measures should be undertaken to immediately eliminate the pest. PMID:17019023

  16. Will oil palm's homecoming spell doom for Africa's great apes?

    PubMed

    Wich, Serge A; Garcia-Ulloa, John; Kühl, Hjalmar S; Humle, Tatanya; Lee, Janice S H; Koh, Lian Pin

    2014-07-21

    Expansion of oil palm plantations has led to extensive wildlife habitat conversion in Southeast Asia [1]. This expansion is driven by a global demand for palm oil for products ranging from foods to detergents [2], and more recently for biofuels [3]. The negative impacts of oil palm development on biodiversity [1, 4, 5], and on orangutans (Pongo spp.) in particular, have been well documented [6, 7] and publicized [8, 9]. Although the oil palm is of African origin, Africa's production historically lags behind that of Southeast Asia. Recently, significant investments have been made that will likely drive the expansion of Africa's oil palm industry [10]. There is concern that this will lead to biodiversity losses similar to those in Southeast Asia. Here, we analyze the potential impact of oil palm development on Africa's great apes. Current great ape distribution in Africa substantially overlaps with current oil palm concessions (by 58.7%) and areas suitable for oil palm production (by 42.3%). More importantly, 39.9% of the distribution of great ape species on unprotected lands overlaps with suitable oil palm areas. There is an urgent need to develop guidelines for the expansion of oil palm in Africa to minimize the negative effects on apes and other wildlife. There is also a need for research to support land use decisions to reconcile economic development, great ape conservation, and avoiding carbon emissions. PMID:25017207

  17. Differential water mite parasitism, phenoloxidase activity, and resistance to mites are unrelated across pairs of related damselfly species.

    PubMed

    Mlynarek, Julia J; Iserbyt, Arne; Nagel, Laura; Forbes, Mark R

    2015-01-01

    Related host species often demonstrate differences in prevalence and/or intensity of infection by particular parasite species, as well as different levels of resistance to those parasites. The mechanisms underlying this interspecific variation in parasitism and resistance expression are not well understood. Surprisingly, few researchers have assessed relations between actual levels of parasitism and resistance to parasites seen in nature across multiple host species. The main goal of this study was to determine whether interspecific variation in resistance against ectoparasitic larval water mites either was predictive of interspecific variation in parasitism for ten closely related species of damselflies (grouped into five "species pairs"), or was predicted by interspecific variation in a commonly used measure of innate immunity (total Phenoloxidase or potential PO activity). Two of five species pairs had interspecific differences in proportions of individuals resisting larval Arrenurus water mites, only one of five species pairs had species differences in prevalence of larval Arrenurus water mites, and another two of five species pairs showed species differences in mean PO activity. Within the two species pairs where species differed in proportion of individuals resisting mites the species with the higher proportion did not have correspondingly higher PO activity levels. Furthermore, the proportion of individuals resisting mites mirrored prevalence of parasitism in only one species pair. There was no interspecific variation in median intensity of mite infestation within any species pair. We conclude that a species' relative ability to resist particular parasites does not explain interspecific variation in parasitism within species pairs and that neither resistance nor parasitism is reflected by interspecific variation in total PO or potential PO activity. PMID:25658982

  18. Differential Water Mite Parasitism, Phenoloxidase Activity, and Resistance to Mites Are Unrelated across Pairs of Related Damselfly Species

    PubMed Central

    Mlynarek, Julia J.; Iserbyt, Arne; Nagel, Laura; Forbes, Mark R.

    2015-01-01

    Related host species often demonstrate differences in prevalence and/or intensity of infection by particular parasite species, as well as different levels of resistance to those parasites. The mechanisms underlying this interspecific variation in parasitism and resistance expression are not well understood. Surprisingly, few researchers have assessed relations between actual levels of parasitism and resistance to parasites seen in nature across multiple host species. The main goal of this study was to determine whether interspecific variation in resistance against ectoparasitic larval water mites either was predictive of interspecific variation in parasitism for ten closely related species of damselflies (grouped into five “species pairs”), or was predicted by interspecific variation in a commonly used measure of innate immunity (total Phenoloxidase or potential PO activity). Two of five species pairs had interspecific differences in proportions of individuals resisting larval Arrenurus water mites, only one of five species pairs had species differences in prevalence of larval Arrenurus water mites, and another two of five species pairs showed species differences in mean PO activity. Within the two species pairs where species differed in proportion of individuals resisting mites the species with the higher proportion did not have correspondingly higher PO activity levels. Furthermore, the proportion of individuals resisting mites mirrored prevalence of parasitism in only one species pair. There was no interspecific variation in median intensity of mite infestation within any species pair. We conclude that a species’ relative ability to resist particular parasites does not explain interspecific variation in parasitism within species pairs and that neither resistance nor parasitism is reflected by interspecific variation in total PO or potential PO activity. PMID:25658982

  19. 77 FR 63722 - Special Local Regulations; Palm Beach World Championship, Atlantic Ocean; Jupiter, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-17

    ...Special Local Regulations; Palm Beach World Championship, Atlantic Ocean; Jupiter...Jupiter, Florida during the Palm Beach World Championship, a high speed power boat race. The Palm Beach World Championship is scheduled to take...

  20. Research Paper Development of a rheological method to characterize palm oil

    E-print Network

    Research Paper Development of a rheological method to characterize palm oil crystallizing under Rheology and Polymer Processing, Catholic University of Leuven, Heverlee, Belgium To follow palm oil microscopy. Keywords: Crystallization / Microstructural development / Palm oil / Rheology / Shear Received

  1. Enzymatic adaptations of herbivorous insects and mites to phytochemicals

    Microsoft Academic Search

    Sami Ahmad

    1986-01-01

    A variety of oxidases, reductases, esterases, epoxide hydrolases, and group transferases in herbivorous insects and mites detoxify and facilitate the excretion of toxic phytochemicals (allelochemicals). Current theory indicates that the cytochrome P-450-dependent mixed-function oxidases (MFOs) are by far the most important enzymes because they have many attributes that are essential for an effective detoxification system. Data presented here on the

  2. Modeling Responses to Respiratory House Dust Mite Exposure

    Microsoft Academic Search

    E. Cates; R. Fattouh; J. Johnson; A. Llop-Guevara; M. Jordana

    2007-01-01

    House dust mite (HDM) is the most pervasive indoor aeroallergen source worldwide. Allergens derived from HDM are associated with sensitization and allergic asthma. Allergic asthma is an immunologically driven disease characterized by a Th2-polarized immune response, eosinophilic inflammation, airway hyperreactivity, and remodeling. Animal models of asthma utilizing ovalbumin (OVA) exposure have afforded us considerable insight with respect to the mediators

  3. Feather mites of Brazil (Acari: Astigmata: Analgoidea and Pterolichoidea)

    Microsoft Academic Search

    Michel P. Valim; Fabio A. Hernandes; Heather C. Proctor

    2011-01-01

    We present a checklist of feather mites known from native birds in Brazil. The list was compiled from a survey of Brazilian records published in indexing databases (e.g. Zoological Records) and from the available literature. To date, 185 nominal species representing 21 families have been recorded from Brazilian birds. Associations with 15 bird orders were found: Anseriformes, Apodiformes, Caprimulgiformes, Ciconiiformes,

  4. PEST&CROP INDEX 2009 INSECTS, MITES & NEMATODES

    E-print Network

    Ginzel, Matthew

    and Red Bugs in Soybean - 12 Corn Flea Beetle Winter Temperatures, Corn Flea Beetle Survival is Predictable For Insect Pests - 3 Japanese Beetle Japanese Beetles Emerging - 12 Japanese Beetle in Corn - 17 Soybean Aphid Migration to Winter Host: Started Strong But Ended Weak - 27 Spider Mites Yellow Beans, Many

  5. PEST&CROP INDEX 2007 INSECTS, MITES & NEMATODES

    E-print Network

    Ginzel, Matthew

    , and Beetles ­ 13 What is That Gigantic Beetle - 16 Mexican Bean Beetle Millipede Expect the Unexpected WhenPEST&CROP INDEX 2007 INSECTS, MITES & NEMATODES Asian Lady Beetle Asiatic Garden Beetle A New Field Crops Pest for Indiana: Asiatic Garden Beetle ­ 11 Asiatic Beetle Grub Update - 12 Alfalfa Weevil

  6. PEST&CROP INDEX 2008 INSECTS, MITES & NEMATODES

    E-print Network

    Ginzel, Matthew

    ­ 10 Armyworm and Slugs, Here and There ­ 11 Whorl Feeding Worms in Late Corn - 14 Bean Leaf Beetle Bean Leaf Beetle Pod Feeding on Late Soybean ­ 23 Black Cutworm Black Cutworm Spring Arrival MetPEST&CROP INDEX 2008 INSECTS, MITES & NEMATODES Asiatic Garden Beetle Asiatic Garden Beetle is Back

  7. Mites as Selective Fungal Carriers in Stored Grain Habitats

    Microsoft Academic Search

    Jan Hubert; Václav Stejskal; Alena Kubátová; Zuzana Munzbergová; Marie Vá?ová; Eva Žd’árková

    2003-01-01

    Mites are well documented as vectors of micromycetes in stored products. Since their vectoring capacity is low due to their small size, they can be serious vectors only where there is selective transfer of a high load of specific fungal species. Therefore the aim of our work was to find out whether the transfer of fungi is selective. Four kinds

  8. SOME ASPECTS OF THE PROCESS OF VARROA JACOBSONI MITE ENTRANCE

    E-print Network

    Paris-Sud XI, Université de

    . The precise time of this functional « Varroa-trap» in worker and drone cells is determined for the first time. The duration of its function amounts to 15 and 45 hours before sealing of the worker and drone cells mg in worker cells and 200 mg in drone cells. Mites are released from the trap within 6 hours after

  9. Ubiquity and diversity of human-associated Demodex mites.

    PubMed

    Thoemmes, Megan S; Fergus, Daniel J; Urban, Julie; Trautwein, Michelle; Dunn, Robert R

    2014-01-01

    Demodex mites are a group of hair follicle and sebaceous gland-dwelling species. The species of these mites found on humans are arguably the animals with which we have the most intimate interactions. Yet, their prevalence and diversity have been poorly explored. Here we use a new molecular method to assess the occurrence of Demodex mites on humans. In addition, we use the 18S rRNA gene (18S rDNA) to assess the genetic diversity and evolutionary history of Demodex lineages. Within our samples, 100% of people over 18 years of age appear to host at least one Demodex species, suggesting that Demodex mites may be universal associates of adult humans. A phylogenetic analysis of 18S rDNA reveals intraspecific structure within one of the two named human-associated Demodex species, D. brevis. The D. brevis clade is geographically structured, suggesting that new lineages are likely to be discovered as humans from additional geographic regions are sampled. PMID:25162399

  10. Negative Evidence of Wolbachia in the Predaceous Mite Phytoseiulus persimilis

    Microsoft Academic Search

    M. Enigl; E. Zchori-Fein; P. Schausberger

    2005-01-01

    The cytoplasmically inherited bacterium Wolbachia is widespread in arthropod species and has been repeatedly detected in the predaceous mite Phytoseiulus persimilis. Our original goal was to assess the prevalence of Wolbachia infection in P. persimilis and the potential fitness consequences for this host. To accomplish that goal, seven P. persimilis strains were obtained from Europe, Africa and the USA and

  11. Control of insects and spider mites by translocated compounds

    E-print Network

    Ivy, Edward Everett

    1951-01-01

    for this proposed new compound? Basically, what is being done to find it? And finally, must we, as was done in Germany, wait for the desperate exigency of another war before we really start looking for it? REVIEW OF LITERATURE The injection of chemicals................................................... 1 REVIEW OP LITERATURE......................................... 6 OCTAMETHIL PIROPHOSPHORAMIDE................................. 19 Tests Against Spider Mites and Aphids ? ? ? ? ? ? ? ? ? ? ? ? 19 Nutrient Solution T e...

  12. Modeling Of Honey Bee And Varroa Mite Population Dynamics

    Microsoft Academic Search

    Roger Hoopingarner

    The life history of the honey bee Apis mellifera and the bee mite Farroa jacobsoni and their interactions were modeled using a commercial software package known as Stella II. Stella II provides a non- mathematically intensive modeling technique that allows the user to generate a series of differential equations that can track a population through time with a minimum set

  13. COCCINELLIDAE AS PREDATORS OF MITES: STETHORINI IN BIOLOGICAL CONTROL

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The Stethorini are unique among the Coccinellidae in specializing on mites (principally Tetranychidae) as prey. Consisting of 90 species in two genera, Stethorus and Parasthethorus, the tribe is practically cosmopolitan, and found in diverse habitats, including many agricultural systems, as well as ...

  14. May/June 1996 AHB Update Tracheal Mites and Amitraz

    E-print Network

    Ferrara, Katherine W.

    May/June 1996 AHB Update Tracheal Mites and Amitraz Loss Reports Tucson Bee Lab Furadan and Cotton-south line right down the irrigated valley - Niland, Calipatria, Brawley, Calexico. Dr. Rob Page's graduate of Coachella Valley. A couple of specimens with subsaharan ancestry (AHBs to us) were found around Blythe

  15. DO TRACHEAL MITES REDUCE THE LONGEVITY OF WORKERS?

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The longevity of individual workers exposed to tracheal mites at different times of the year was evaluated in observation hives and in hoarding cages. Young workers (< 24 h) from colonies known to be highly resistant and highly susceptible to infestation were painted or tagged with plastic-numbered...

  16. Handbook of forage and rangeland insects: Timothy Mites

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Several eriophyid rust mites are important and have been recently recognized as pests on timothy grass. They live and feed in the grooves of the leaves, are cold-adapted, and populations begin to grow gradually in the fall and peak in the spring. Damage can cause up to 50% yield loss and results i...

  17. SOME INSECTS AND MITES NEW TO FLORIDA SUGARCANE

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The number of insect and mite species attacking sugarcane in Florida has increased over time. Five new pest species were discovered during the 31-year period 1964 to 1995, one species indigenous to Florida with no previous association with sugarcane and four invasive species entirely new to the Ever...

  18. Integrated pest management for oil palm in Papua New Guinea

    Microsoft Academic Search

    R. W. CAUDWELL; I. ORRELL

    1997-01-01

    The global production ofpalm oil has increased very rapidly, more than doubling between1970 and 1980. Oil palm is the second most important cash crop inPapua New Guinea (PNG), and in 1995 its export value wasUS$128 million. The principal pests of oil palm in PNG are agroup of tettigonids, collectively known as Sexava, which causedamage by defoliating the oil palm tree.

  19. Carotenoids concentration of palm oil using membrane technology

    Microsoft Academic Search

    Ming Chih Chiu; Cesar de Morais Coutinho; Lireny Aparecida Guaraldo Gonçalves

    2009-01-01

    Typically, crude palm oil contains 500–700 mg\\/kg of carotenoids and 800 mg\\/kg of tocopherols. The major carotenoids of palm oil are ?- and ?-carotenes, which constitute more than 80% of the total carotenoids in palm oil. Membrane technology is being examined as an alternative to conventional oils refining due to low energy consumption, ambient temperature operation, no addition of chemicals,

  20. Continuous supercritical carbon dioxide processing of palm oil

    Microsoft Academic Search

    C. K. Ooi; A. Bhaskar; M. S. Yener; D. Q. Tuan; J. Hsu; S. S. H. Rizvi

    1996-01-01

    Crude palm oil was processed by continuous supercritical carbon dioxide. The process reduces the contents of free fatty acids,\\u000a monoglycerides and diglycerides, certain triglycerides, and some carotenes. The refined palm oil from the process has less\\u000a than 0.1% free fatty acids, higher carotene content, and low diglycerides. Solubility of palm oil in supercritical carbon\\u000a dioxide increased with pressure. A co-solvent

  1. Trade in Palm Products in North-Western South America

    Microsoft Academic Search

    Grischa Brokamp; Natalia Valderrama; Moritz Mittelbach; Anders S. Barfod; Maximilian Weigend

    More than 200 scientific publications and Internet sources dealing with trade in palm products in north-western South America\\u000a are reviewed. We focus on value chains, trade volumes, prices, and recent developments for some of the most important raw\\u000a materials derived from native palms. Trade in palm products takes place at local, regional, national, and international levels.\\u000a For local communities and

  2. Shift of Bacterial Community in Synanthropic Mite Tyrophagus putrescentiae Induced by Fusarium Fungal Diet

    PubMed Central

    Hubert, Jan; Nesvorná, Marta; Ságová-Mare?ková, Markéta; Kopecký, Jan

    2012-01-01

    Background Tyrophagus putrescentiae (Acari: Astigmata) and Fusarium sp. co-occur in poorly managed grain. In a laboratory experiment, mite grazing resulted in significant reduction of fungal mycelium on cultivation plates. The destruction of mycelium appeared to be a result of an interaction between the mites, fungi and associated bacteria. Methodology and Principal Findings A laboratory experiment was performed to simulate a situation of grain multiinfested by mites and Fusarium fungi. Changes of mite-associated bacterial community in T. putrescentiae were described in 3 habitats: (i) T. putrescentiae mites from a rearing diet prior to their transfer to fungal diet; (ii) fungal mycelium before mite introduction; (iii) mites after 7 day diet of each Fusarium avenaceum, F. culmorum, F. poae and F. verticillioides. Bacterial communities were characterized by 16 S rRNA gene sequencing. In total, 157 nearly full-length 16 S rRNA gene sequences from 9 samples representing selected habitats were analyzed. In the mites, the shift from rearing to fungal diet caused changes in mite associated bacterial community. A diverse bacterial community was associated with mites feeding on F. avenaceum, while feeding on the other three Fusarium spp. led to selection of a community dominated by Bacillaceae. Conclusions/Significance The work demonstrated changes of bacterial community associated with T. putrescentiae after shift to fungal diets suggesting selection for Bacillaceae species known as chitinase producers, which might participate in the fungal mycelium hydrolysis. PMID:23119013

  3. The prevalence of house dust mites, Dermatophagoides spp, and associated environmental conditions in homes in Ohio.

    PubMed

    Arlian, L G; Bernstein, I L; Gallagher, J S

    1982-06-01

    Abundance of the house dust mites, Dermatophagoides farinae and D. pteronyssinus, in various sites in the homes of dust-sensitive patients was sequentially monitored at approximately 3 wk intervals for 2 yr, and mite density was correlated with indoor physical and climatic factors. Significantly higher mite levels occurred on the most heavily used fabric-upholstered furniture and carpeted floor areas of the living/family room and bedrooms. Mattresses were not found to be the major foci for mites. No significant positive correlation was noted between mite abundance and frequency or thoroughness of cleaning, amount of dust, and age of furnishings or dwelling. Significantly higher mite levels occurred on carpeted floors than on noncarpeted floors. Successive vacuuming did not significantly reduce mite abundance. Mite density exhibited a seasonal fluctuation, with highest density occurring in the humid summer months and the lowest density during the dryer, late heating season. Live mites were more abundant than dead mites during the period when total abundance was high. In homes inhabited by both species, D. farinae was the dominant species, except in one home that had a significantly higher relative humidity. PMID:7076994

  4. Carbon emissions from forest conversion by Kalimantan oil palm plantations

    NASA Astrophysics Data System (ADS)

    Carlson, Kimberly M.; Curran, Lisa M.; Asner, Gregory P.; Pittman, Alice Mcdonald; Trigg, Simon N.; Marion Adeney, J.

    2013-03-01

    Oil palm supplies >30% of world vegetable oil production. Plantation expansion is occurring throughout the tropics, predominantly in Indonesia, where forests with heterogeneous carbon stocks undergo high conversion rates. Quantifying oil palm's contribution to global carbon budgets therefore requires refined spatio-temporal assessments of land cover converted to plantations. Here, we report oil palm development across Kalimantan (538,346km2) from 1990 to 2010, and project expansion to 2020 within government-allocated leases. Using Landsat satellite analyses to discern multiple land covers, coupled with above- and below-ground carbon accounting, we develop the first high-resolution carbon flux estimates from Kalimantan plantations. From 1990 to 2010, 90% of lands converted to oil palm were forested (47% intact, 22% logged, 21% agroforests). By 2010, 87% of total oil palm area (31,640km2) occurred on mineral soils, and these plantations contributed 61-73% of 1990-2010 net oil palm emissions (0.020-0.024GtCyr-1). Although oil palm expanded 278% from 2000 to 2010, 79% of allocated leases remained undeveloped. By 2020, full lease development would convert 93,844km2 (~ 90% forested lands, including 41% intact forests). Oil palm would then occupy 34% of lowlands outside protected areas. Plantation expansion in Kalimantan alone is projected to contribute 18-22% (0.12-0.15GtCyr-1) of Indonesia's 2020 CO2-equivalent emissions. Allocated oil palm leases represent a critical yet undocumented source of deforestation and carbon emissions.

  5. Time series ARIMA models for daily price of palm oil

    NASA Astrophysics Data System (ADS)

    Ariff, Noratiqah Mohd; Zamhawari, Nor Hashimah; Bakar, Mohd Aftar Abu

    2015-02-01

    Palm oil is deemed as one of the most important commodity that forms the economic backbone of Malaysia. Modeling and forecasting the daily price of palm oil is of great interest for Malaysia's economic growth. In this study, time series ARIMA models are used to fit the daily price of palm oil. The Akaike Infromation Criterion (AIC), Akaike Infromation Criterion with a correction for finite sample sizes (AICc) and Bayesian Information Criterion (BIC) are used to compare between different ARIMA models being considered. It is found that ARIMA(1,2,1) model is suitable for daily price of crude palm oil in Malaysia for the year 2010 to 2012.

  6. Spatial associations of insects and mites in stored wheat.

    PubMed

    Athanassiou, Christos G; Kavallieratos, Nickolas G; Sciarretra, Andrea; Palyvos, Nickolas E; Trematerra, Pasquale

    2011-10-01

    The spatial association pattern of insect and mite populations in a steel bin containing stored wheat, Triticum durum Desf., in central Greece, was studied using the Spatial Analysis by Distance IndicEs (SADIE). The monitoring was carried out for 7 mo by using grain trier samples and probe traps. The most abundant insect species were Cryptolestes ferrugineus (Stephens) (Coleoptera: Laemophloeidae) and Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae). For mites, the most abundant species were the phytophagous Lepidoglyphus destructor (Schrank) (Acari: Glycyphagidae) and the predator Blattisocius tarsalis (Berlese) (Mesostigmata: Ascidae). Both for P. interpunctella and C. ferrugineus, trap catches were associated with numbers of individuals in the trier samples, but the overall association index calculated among trap and sample counts was significant only in the 33% of trap-sample pairs of values. Generally, P. interpunctella had the main patch areas in the central part of the bin, with few exceptions, during the entire monitoring period. Similar trends also were noted in the case of C. ferrugineus, which was clearly aggregated in the center of the grain mass. Spatial association maps indicated a stable positive association in the central part of the bin, but in most of the other sampling zones the association was negative. However, distribution of L. destructor, based on trier samples, indicated increased presence in peripheral zones of the grain sampling area. Moreover, B. tarsalis presented the most dispersed distribution among all four species. For each species, the association between two consecutive samplings was significant in the majority of cases, indicating a stable spatial pattern. Finally, B. tarsalis was spatially associated to a higher degree with the insects found rather than with L. desctructor. Moreover, there was no association of insect and mite presence with grain temperature and moisture content. The results of the current study suggest that the coexistence of insects and mites in bulked grain follows a complex pattern, with significant interactions, especially in the case of mite predators, which are spatially associated with insect species. PMID:22066207

  7. Structural Mechanisms of Inactivation in Scabies Mite Serine Protease Paralogues

    SciTech Connect

    Fischer, Katja; Langendorf, Christopher G.; Irving, James A.; Reynolds, Simone; Willis, Charlene; Beckham, Simone; Law, Ruby H.P.; Yang, Sundy; Bashtannyk-Puhalovich, Tanya A.; McGowan, Sheena; Whisstock, James C.; Pike, Robert N.; Kemp, David J.; Buckle, Ashley M.; (Monash); (Queensland Inst. of Med. Rsrch.)

    2009-08-07

    The scabies mite (Sarcoptes scabiei) is a parasite responsible for major morbidity in disadvantaged communities and immuno-compromised patients worldwide. In addition to the physical discomfort caused by the disease, scabies infestations facilitate infection by Streptococcal species via skin lesions, resulting in a high prevalence of rheumatic fever/heart disease in affected communities. The scabies mite produces 33 proteins that are closely related to those in the dust mite group 3 allergen and belong to the S1-like protease family (chymotrypsin-like). However, all but one of these molecules contain mutations in the conserved active-site catalytic triad that are predicted to render them catalytically inactive. These molecules are thus termed scabies mite inactivated protease paralogues (SMIPPs). The precise function of SMIPPs is unclear; however, it has been suggested that these proteins might function by binding and protecting target substrates from cleavage by host immune proteases, thus preventing the host from mounting an effective immune challenge. In order to begin to understand the structural basis for SMIPP function, we solved the crystal structures of SMIPP-S-I1 and SMIPP-S-D1 at 1.85 {angstrom} and 2.0 {angstrom} resolution, respectively. Both structures adopt the characteristic serine protease fold, albeit with large structural variations over much of the molecule. In both structures, mutations in the catalytic triad together with occlusion of the S1 subsite by a conserved Tyr200 residue is predicted to block substrate ingress. Accordingly, we show that both proteases lack catalytic function. Attempts to restore function (via site-directed mutagenesis of catalytic residues as well as Tyr200) were unsuccessful. Taken together, these data suggest that SMIPPs have lost the ability to bind substrates in a classical 'canonical' fashion, and instead have evolved alternative functions in the lifecycle of the scabies mite.

  8. Structural mechanisms of inactivation in scabies mite serine protease paralogues.

    PubMed

    Fischer, Katja; Langendorf, Christopher G; Irving, James A; Reynolds, Simone; Willis, Charlene; Beckham, Simone; Law, Ruby H P; Yang, Sundy; Bashtannyk-Puhalovich, Tanya A; McGowan, Sheena; Whisstock, James C; Pike, Robert N; Kemp, David J; Buckle, Ashley M

    2009-07-24

    The scabies mite (Sarcoptes scabiei) is a parasite responsible for major morbidity in disadvantaged communities and immuno-compromised patients worldwide. In addition to the physical discomfort caused by the disease, scabies infestations facilitate infection by Streptococcal species via skin lesions, resulting in a high prevalence of rheumatic fever/heart disease in affected communities. The scabies mite produces 33 proteins that are closely related to those in the dust mite group 3 allergen and belong to the S1-like protease family (chymotrypsin-like). However, all but one of these molecules contain mutations in the conserved active-site catalytic triad that are predicted to render them catalytically inactive. These molecules are thus termed scabies mite inactivated protease paralogues (SMIPPs). The precise function of SMIPPs is unclear; however, it has been suggested that these proteins might function by binding and protecting target substrates from cleavage by host immune proteases, thus preventing the host from mounting an effective immune challenge. In order to begin to understand the structural basis for SMIPP function, we solved the crystal structures of SMIPP-S-I1 and SMIPP-S-D1 at 1.85 A and 2.0 A resolution, respectively. Both structures adopt the characteristic serine protease fold, albeit with large structural variations over much of the molecule. In both structures, mutations in the catalytic triad together with occlusion of the S1 subsite by a conserved Tyr200 residue is predicted to block substrate ingress. Accordingly, we show that both proteases lack catalytic function. Attempts to restore function (via site-directed mutagenesis of catalytic residues as well as Tyr200) were unsuccessful. Taken together, these data suggest that SMIPPs have lost the ability to bind substrates in a classical "canonical" fashion, and instead have evolved alternative functions in the lifecycle of the scabies mite. PMID:19427318

  9. PALM-BASED SODIUM DIHYDROXYSTEARATE DEODORANT STICK

    Microsoft Academic Search

    Zahariah Ismail; Salmiah Ahmad; Rosnah Ismail; Rigano Luigi

    Dihydroxystearic acid (DHSA) has been prepared from palm oleic acid via catalytic reaction. In-vivo test confirmed that the use of DHSA at 5% and below is non-irritant. With two vicinal alcohol groups positioning at C9 and C10, DHSA has been found to be applicable in cosmetics as thickener or gelling agents. Stearic acid is known to be used as stick-gel

  10. Frying performance of palm oil liquid fractions

    Microsoft Academic Search

    U. Bracco; A. Dieffenbacher; L. Kolarovic

    1981-01-01

    Palm oil liquid fractions were used as frying media in household and industrial fryers and were compared to standard edible\\u000a oils and fats, such as soybean, groundnut, sunflower, rapeseed and tallow. The analytical evaluation covered free fatty acids,\\u000a viscosity, smoke and flame points, oxidized fatty acids, nonelution material (NEM), UV differential spectra, polymers and\\u000a foam index. These values measure the

  11. New approach for the study of mite reproduction: the first transcriptome analysis of a mite, Phytoseiulus persimilis (Acari: Phytoseiidae)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Many species of mites and ticks are of agricultural and medical importance. Much can be learned from the study of transcriptomes of acarines which can generate DNA-sequence information of potential target genes for the control of acarine pests. High throughput transcriptome sequencing can also yie...

  12. Genetic characterization of North American populations of the wheat curl mite (Aceria tosichella) and dry bulb mite (Aceria tulipae)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The wheat curl mite, Aceria tosichella Keifer, transmits at least three harmful viruses, wheat streak mosaic virus (WSMV), high plains virus (HPV), and Triticum mosaic virus (TriMV) to wheat (Triticum aestivum L.) throughout the Great Plains. This virus complex is considered to be the most serious d...

  13. The Involvement of Volatile Infochemicals from Spider Mites and from Food-Plants in Prey Location of the Generalist Predatory Mite Neoseiulus californicus

    Microsoft Academic Search

    Takeshi Shimoda; Rika Ozawa; Kota Sano; Eizi Yano; Junji Takabayashi

    2005-01-01

    We investigated volatile infochemicals possibly involved in location of the generalist predatory mite Neoseiulus californicus to plants infested with spider mites in a Y-tube olfactometer. The predators significantly preferred volatiles from lima bean leaves infested with Tetranychus urticae to uninfested lima bean leaves. Likewise, they were attracted to volatiles from artificially damaged lima bean leaves and those from T. urticae

  14. Nitric oxide production by alveolar macrophages in response to house dust mite fecal pellets and the mite allergens, Der p 1 and Der p 2

    Microsoft Academic Search

    Helen L. Peake; Andrew J. Currie; Geoffrey A. Stewart; Andrew S. McWilliam

    2003-01-01

    BackgroundAllergens are frequently found within or attached to particulate material. For example, house dust mite fecal pellets (HDMFP) contain the major mite allergens, exposure to which have been implicated in the development of asthma. Although several studies have examined the ability of purified allergens to generate inflammatory responses, few studies have investigated whether HDMFP per se, are biologically active.

  15. MITES OF THE HONEY BEE: WE TAKE A BREIF OVERVIEW OF THE ORIGIN OF PARASITIC HONEY BEE MITES AND HOW THEY FIT INTO THE SCHEME OF THINGS

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Mites exploit any habitat in which animals or plants can live, and they are rival insects in the diversity of living sites and life cycles. Mites are found in soil, in water (fresh and salt), in and on plants, arthropods, vertebrates and invertebrates. They are found in polar extremes and desert ...

  16. Minimizing the biodiversity impact of Neotropical oil palm development.

    PubMed

    Gilroy, James J; Prescott, Graham W; Cardenas, Johann S; Castańeda, Pamela González Del Pliego; Sánchez, Andrés; Rojas-Murcia, Luis E; Medina Uribe, Claudia A; Haugaasen, Torbjřrn; Edwards, David P

    2015-04-01

    Oil palm agriculture is rapidly expanding in the Neotropics, at the expense of a range of natural and seminatural habitats. A key question is how this expansion should be managed to reduce negative impacts on biodiversity. Focusing on the Llanos of Colombia, a mixed grassland-forest system identified as a priority zone for future oil palm development, we survey communities of ants, dung beetles, birds and herpetofauna occurring in oil palm plantations and the other principal form of agriculture in the region - improved cattle pasture - together with those of surrounding natural forests. We show that oil palm plantations have similar or higher species richness across all four taxonomic groups than improved pasture. For dung beetles, species richness in oil palm was equal to that of forest, whereas the other three taxa had highest species richness in forests. Hierarchical modelling of species occupancy probabilities indicated that oil palm plantations supported a higher proportion of species characteristic of forests than did cattle pastures. Across the bird community, occupancy probabilities within oil palm were positively influenced by increasing forest cover in a surrounding 250 m radius, whereas surrounding forest cover did not strongly influence the occurrence of other taxonomic groups in oil palm. Overall, our results suggest that the conversion of existing improved pastures to oil palm has limited negative impacts on biodiversity. As such, existing cattle pastures of the Colombian Llanos could offer a key opportunity to meet governmental targets for oil palm development without incurring significant biodiversity costs. Our results also highlight the value of preserving remnant forests within these agricultural landscapes, protecting high biodiversity and exporting avian 'spill-over' effects into oil palm plantations. PMID:25175402

  17. Oil palm natural diversity and the potential for yield improvement.

    PubMed

    Barcelos, Edson; Rios, Sara de Almeida; Cunha, Raimundo N V; Lopes, Ricardo; Motoike, Sérgio Y; Babiychuk, Elena; Skirycz, Aleksandra; Kushnir, Sergei

    2015-01-01

    African oil palm has the highest productivity amongst cultivated oleaginous crops. Species can constitute a single crop capable to fulfill the growing global demand for vegetable oils, which is estimated to reach 240 million tons by 2050. Two types of vegetable oil are extracted from the palm fruit on commercial scale. The crude palm oil and kernel palm oil have different fatty acid profiles, which increases versatility of the crop in industrial applications. Plantations of the current varieties have economic life-span around 25-30 years and produce fruits around the year. Thus, predictable annual palm oil supply enables marketing plans and adjustments in line with the economic forecasts. Oil palm cultivation is one of the most profitable land uses in the humid tropics. Oil palm fruits are the richest plant source of pro-vitamin A and vitamin E. Hence, crop both alleviates poverty, and could provide a simple practical solution to eliminate global pro-vitamin A deficiency. Oil palm is a perennial, evergreen tree adapted to cultivation in biodiversity rich equatorial land areas. The growing demand for the palm oil threatens the future of the rain forests and has a large negative impact on biodiversity. Plant science faces three major challenges to make oil palm the key element of building the future sustainable world. The global average yield of 3.5 tons of oil per hectare (t) should be raised to the full yield potential estimated at 11-18t. The tree architecture must be changed to lower labor intensity and improve mechanization of the harvest. Oil composition should be tailored to the evolving needs of the food, oleochemical and fuel industries. The release of the oil palm reference genome sequence in 2013 was the key step toward this goal. The molecular bases of agronomically important traits can be and are beginning to be understood at the single base pair resolution, enabling gene-centered breeding and engineering of this remarkable crop. PMID:25870604

  18. Oil palm natural diversity and the potential for yield improvement

    PubMed Central

    Barcelos, Edson; Rios, Sara de Almeida; Cunha, Raimundo N. V.; Lopes, Ricardo; Motoike, Sérgio Y.; Babiychuk, Elena; Skirycz, Aleksandra; Kushnir, Sergei

    2015-01-01

    African oil palm has the highest productivity amongst cultivated oleaginous crops. Species can constitute a single crop capable to fulfill the growing global demand for vegetable oils, which is estimated to reach 240 million tons by 2050. Two types of vegetable oil are extracted from the palm fruit on commercial scale. The crude palm oil and kernel palm oil have different fatty acid profiles, which increases versatility of the crop in industrial applications. Plantations of the current varieties have economic life-span around 25–30 years and produce fruits around the year. Thus, predictable annual palm oil supply enables marketing plans and adjustments in line with the economic forecasts. Oil palm cultivation is one of the most profitable land uses in the humid tropics. Oil palm fruits are the richest plant source of pro-vitamin A and vitamin E. Hence, crop both alleviates poverty, and could provide a simple practical solution to eliminate global pro-vitamin A deficiency. Oil palm is a perennial, evergreen tree adapted to cultivation in biodiversity rich equatorial land areas. The growing demand for the palm oil threatens the future of the rain forests and has a large negative impact on biodiversity. Plant science faces three major challenges to make oil palm the key element of building the future sustainable world. The global average yield of 3.5 tons of oil per hectare (t) should be raised to the full yield potential estimated at 11–18t. The tree architecture must be changed to lower labor intensity and improve mechanization of the harvest. Oil composition should be tailored to the evolving needs of the food, oleochemical and fuel industries. The release of the oil palm reference genome sequence in 2013 was the key step toward this goal. The molecular bases of agronomically important traits can be and are beginning to be understood at the single base pair resolution, enabling gene-centered breeding and engineering of this remarkable crop. PMID:25870604

  19. Pollen consumption by flower mites in three hummingbird-pollinated plant species.

    PubMed

    Velázquez, Tonatiuh; Ornelas, Juan Francisco

    2010-02-01

    Laboratory studies suggest that pollen consumption by flower mites may decrease the male fitness of the plant by reducing the available pollen for dispersal. Here we assessed pollen consumption by flower mites under natural conditions in three plant species with long-lived, protandrous flowers, Moussonia deppeana (Gesneriaceae), Lobelia laxiflora and L. cardinalis (Lobeliaceae). Total pollen mass was measured after 24 and 48 h in flowers exposed to flower mites and excluded from hummingbirds, flowers exposed to mites and hummingbird visitation, and in flowers recently opened with dehisced anthers. Compared with recently opened flowers, pollen availability was reduced about half in the presence of flower mites and the same effect was observed in the three plant species. Our results suggest that flower mites are removing a great deal of pollen and the reduction of pollen implies the possibility of direct impact on pollen transfer. PMID:19763848

  20. Argasid and spinturnicid mite load on swarming bats in the Tatra Mountains, Poland.

    PubMed

    Piksa, Krzysztof; Skwarek, Magdalena; Siuda, Krzysztof

    2011-11-01

    Altogether 445 bats, representing nine species, caught during swarming in the Lodowa Cave in Mount Ciemniak, Western Tatra Mountains, southern Poland, were examined for ectoparasitic mites. In total, 259 spinturnicid (Spinturnix mystacina, S. andegavinus, S. kolenatii, S. plecotinus and S. myoti) and 95 argasid (Carios vespertilionis) mites were collected from seven bat species, Myotis myotis, M. mystacinus, M. brandtii, M. daubentonii, Eptesicus nilssonii, Plecotus auritus, and Vespertilio murinus. There were sex-based differences in the prevalence of mites in some hosts but no differences in their mean intensity and there was no observed relationship between the number of mites and the condition of the bats. The prevalence of mites differed significantly between years in E. nilssonii. The results suggested a very low mite load on swarming bats that had no impact on the body condition of bats. PMID:22263314

  1. Leaf age affects composition of herbivore-induced synomones and attraction of predatory mites

    Microsoft Academic Search

    J. Takabayashi; M. Dicke; S. Takahashi; M. A. Posthumus; T. A. Van Beek

    1994-01-01

    We investigated the olfactory response of the predatory mitePhytoseiulus persimilis to cucumber leaves infested with prey, the herbivorous spider miteTetranychus urticae. The predators responded to volatiles from young rather than old infested cucumber leaves. GC-MS analysis of the head-space of spider mite-infested, artificially damaged and undamaged cucumber plants showed that herbivore-induced plant volatiles were present among the volatiles of both

  2. The toxicity of selected acaricides against five stored product mites under laboratory assay

    Microsoft Academic Search

    Jitka Stará; Marta Nesvorna ´; Jan Hubert

    In laboratory tests, the toxicity of acaricides targeted against house dust mites was tested on five species of stored product\\u000a mites (Acarus siro, Aleuroglyphus ovatus, Carpoglyphus lactis, Lepidoglyphus destructor, and Tyroborus lini). The formulations of benzyl-benzoate, benzyl-benzoate\\/permethrin\\/pyriproxyfen, and neem were diluted in water and applied\\u000a to filter paper in an unventilated chamber. The mortality of mites was observed after 24 h

  3. Immigration of Phytoseiid Mites from Surrounding Uncultivated Areas into a Newly Planted Vineyard

    Microsoft Academic Search

    Marie-Stéphane Tixier; Serge Kreiter; Brigitte Cheval; Sabine Guichou; Philippe Auger; Romain Bonafos

    2006-01-01

    This study reports (1) a faunistic survey of phytoseiid mites observed inside a vine plot and in neighbouring vegetation (other\\u000a vine plots and uncultivated areas) and (2) dispersal of phytoseiid mites into the plot studied. These data aim to raise some\\u000a hypotheses concerning natural colonisation of a vineyard by predatory mites. The study was carried out over 3 years (1999,\\u000a 2000

  4. Differential periods of Varroa mite invasion into worker and drone cells of honey bees

    Microsoft Academic Search

    Willem J. Boot; Johan N. M. Calis; Joop Beetsma

    1992-01-01

    Invasion ofVarroa mites into honeybee brood cells was studied in an observation hive, using combs with cell openings at one side only. The cell bottoms had been replaced by a transparent sheet, through which mites were clearly visible after invasion into a cell. Mites invaded worker cells from 15–20 h preceding cell capping, whereas they invaded drone cells from 40–50

  5. Comparative toxicity of several sulphurs to two species of spider mites attacking cotton

    E-print Network

    Arrese, Luis Humberto

    1957-01-01

    one of the sulphurs was produced in Wyoming from hydrogen sulphide present in sour natural gas. These sulphurs vith certain inforjmLtion as to ash content, carbon and color ratings as supplied by the Texas Gulf Sulphur Company are given in Table l... spider mite, T. desertorum . Studies vith the tumid spider mite, T. tuaidus. Studies vith the desert spider mite, 26 T. desertorum, using the sulphurs and parathion Summary and Conclusions Bibliography . 38 39 Table Page Data on ash, carbon...

  6. Utilization of palm oil in the alkyd resin synthesis

    Microsoft Academic Search

    L. M. Santos; E. Coser; S. Einloft

    2004-01-01

    The high costs, the environmental impact and the decrease of fossil resources are intensifying the research for alternative raw materials in different industrial fields. The palm oil, extracted from palm tree, is a versatile oil compared with others unsaturated vegetable oils. It's utilized by medical, food, oil chemistry and cosmetic industry. Recently, your production has been intensified due to the

  7. Biometric identification through palm and dorsal hand vein patterns

    Microsoft Academic Search

    Sanchit; Mauricio Ramalho; Paulo Lobato Correia; Luis Ducla Soares

    2011-01-01

    Hand vein patterns are among the biometric traits being investigated today for identification purposes, attracting interest from both the research community and industry. This paper presents a multimodal system that combines hand-palm vein and hand-dorsal vein biometrics information at the score level. The palm and dorsal veins are considered as texture samples being automatically extracted from the user's hand image.

  8. Contact sensing palm for the Salisbury robot hand

    SciTech Connect

    Brock, D.L. (Massachusetts Inst. of Tech., Cambridge, MA (USA))

    1990-07-18

    This report summarizes work performed on Tasks 5 and 6 under Sandia Contract Number 75-2608. Task 5 involves the design and development of a palm for the Salisbury robot hand and Task 6 is an investigation and incorporation of contact sensors into the palm design. 19 refs., 8 figs., 1 tab.

  9. PHYSIOLOGICAL ASPECTS OF SEED DEVELOPMENT IN A HAWAIIAN PALM

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The genetic diversity of palms (Arecaceae) is threatened and ex situ conservation efforts are hampered by a poor understanding of their seed biology and storage behavior. Pritchardia remota is fan palm endemic to Hawaii (subtribe Corypheae). Flowering of P. remota occurs mostly during the dry seas...

  10. Symptoms of Calcium and Phosphorus Deficiency in Oil Palm Seedlings

    Microsoft Academic Search

    R. A. Bull

    1958-01-01

    PREVIOUS attempts1,2 to induce symptoms of calcium and phosphorus deficiency in oil palm seedlings grown in water-washed quartz sand have failed. Symptoms have now been induced by growing oil palm seedlings in quartz sand purified by treatment with hot 1 per cent sodium carbonate and hot, constant-boiling hydrochloric acid.

  11. The effect of herbivore faeces on the edaphic mite community: implications for tapeworm transmission.

    PubMed

    Václav, Radovan; Kalúz, Stanislav

    2014-03-01

    Oribatid mites may be of epidemiological and medical importance because several species have been shown to serve as intermediate hosts for anoplocephalid tapeworms of wild and domestic animals. Despite their economic and conservation significance, relatively few studies examined factors influencing the effective number of oribatid mites that can serve as intermediate hosts. We examined variation in the structure of the edaphic arthropod community in functionally different territory parts of the Alpine marmot (Marmota marmota latirostris), a known definitive host of a prevalent anoplocephalid tapeworm, Ctenotaenia marmotae. We used a field experiment to test whether the abundance of oribatid mites in marmot pastures is affected by the presence of fresh herbivore faeces. We found that the abundance of soil and litter dwelling oribatid mites in marmot pastures did not change shortly after faeces addition. In contrast, numbers of other predominant soil-litter and phoretic microarthropods increased after faeces addition. The abundance of the two predominant phoretic mites colonizing the faeces was inversely related to the abundance of oribatid mites. In contrast, the abundance of a ubiquitous soil-litter mesostigmatid mite was a positive function of oribatid numbers. Although absolute numbers of oribatid mites did not change after faeces addition, our study suggests that, depending on soil quality or type, the probability of tapeworm egg ingestion by oribatid mites can be reduced due to increased interspecific prey-predatory and trophic interactions. Latrine site selection in Alpine marmots is consistent with a reduced probability of tapeworm transmission by oribatids. PMID:24114339

  12. Control of the straw itch mite (Acari: Pyemotidae) with sulfur in an insect rearing facility.

    PubMed

    Hanks, L M; McCelfresh, J S; Millar, J G; Paine, T D

    1992-06-01

    The ectoparasitic mite Pyemotes tritici (Lagrčze-Fossat & Montané) (Acari: Pyemotidae) caused paralysis and reduced longevity in eucalyptus longhorned borer, Phoracantha semipunctata F., under laboratory rearing conditions. Application of dusting sulfur to logs that contained pupating borers greatly reduced densities of mites on emerging adult beetles and increased beetle survivorship. Uniform application to all logs in a glasshouse effectively eradicated the mite infestation. A bioassay showed that sulfur may physically impede the dispersal of immature mites by adhering to the cuticle, but sulfur vapor did not act as a toxin. PMID:1619104

  13. FUNCTIONAL ANNOTATION OF OIL PALM GENES USING AN AUTOMATED BIOINFORMATICS APPROACH FUNCTIONAL ANNOTATION OF OIL PALM

    E-print Network

    Sinskey, Anthony J.

    to a COGsensus analysis of the rice genome. COG classification is a homology-based method for distinguishing gene, with typical yields of 3.3 t of oil per hectare per year (Wahid et al., 2005). Palm oil is a rich nutritional., 2002; Jaligot et al., 2004; Billotte et al., 2005; Maizura et al., 2006). Quantitative trait loci (QTLs

  14. Palm Power Free-Piston Stirling Engine Control Electronics

    NASA Astrophysics Data System (ADS)

    Keiter, Douglas E.; Holliday, Ezekiel

    2007-01-01

    A prototype 35We, JP-8 fueled, soldier-wearable power system for the DARPA Palm Power program has been developed and tested by Sunpower. A hermetically-sealed 42We Sunpower Free-Piston Stirling Engine (FPSE) with integral linear alternator is the prime mover for this system. To maximize system efficiency over a broad range of output power, a non-dissipative, highly efficient electronic control system which modulates engine output power by varying piston stroke and converts the AC output voltage of the FPSE into 28Vdc for the Palm Power end user, has been designed and demonstrated as an integral component of the Palm Power system. This paper reviews the current status and progress made in developing the control electronics for the Palm Power system, in addition to describing the operation and demonstrated performance of the engine controller in the context of the current JP-8 fueled Palm Power system.

  15. Evaluation on the suitability of some adhesives for laminated veneer lumber from oil palm trunks

    Microsoft Academic Search

    O. Sulaiman; N. Salim; R. Hashim; L. H. M. Yusof; W. Razak; N. Y. M. Yunus; W. S. Hashim; M. H. Azmy

    2009-01-01

    Laminated veneer lumbers from oil palm trunk were manufactured using urea formaldehyde, phenol formaldehyde, melamine urea formaldehyde, and phenol resorcinol formaldehyde adhesives. The density of the oil palm laminated veneer lumber was slightly higher than the solid oil palm trunk. The thickness swelling and water absorption of laminated veneer lumber of oil palm were higher than those made from rubberwood.

  16. An alternative energy source from palm wastes industry for Malaysia and Indonesia

    Microsoft Academic Search

    T. M. I Mahlia; M. Z Abdulmuin; T. M. I Alamsyah; D Mukhlishien

    2001-01-01

    Malaysia and Indonesia are the largest producers of palm oil product. The palm oil industry has contributed the biggest income to the countries for many years. Moreover, palm oils has emerged as one of the most important oils in the world’s oils and the market of fats. About 90% of palm oil is used as food related products worldwide, and

  17. Effect of Foliar and Substrate Fertilization on Lady Palm Seedling Growth and Development

    Microsoft Academic Search

    Petterson Baptista da Luz; Patrícia Duarte de Oliveira Paiva; Armando Reis Tavares

    2008-01-01

    Lady palm, [Rhapis excelsa (Thunberg) Henry ex. Rehder] is one of the most cultivated ornamental palms in the world, for use as a vase plant or in shaded landscapes. Because limited information exists on lady palm response to fertilizers, the objective of this study was to evaluate the effect of different types of fertilization and substrates on lady palm seedling

  18. Oil palm vegetation liquor: a new source of phenolic bioactives Ravigadevi Sambanthamurthi1

    E-print Network

    Sinskey, Anthony J.

    Oil palm vegetation liquor: a new source of phenolic bioactives Ravigadevi Sambanthamurthi1 *, Yew. Oil palm vegetation liquor thus represents a new source of phenolic bioactives. Key words: Oil palm , Krishnan Subramaniam5 , Soon-Sen Leow1 , Kenneth C. Hayes6 and Mohd Basri Wahid1 1 Malaysian Palm Oil Board

  19. South American Spider Mites: New Hosts and Localities

    PubMed Central

    Mendonça, Renata S; Navia, Denise; Diniz, Ivone R; Flechtmann, Carlos HW

    2011-01-01

    In order to contribute to taxonomic information on Tetranychid mites (Acari: Tetranychidae) in South America, surveys were conducted in Brazil (15 States and the Federal District) and Uruguay (one Department); 550 samples of 120 plant species were collected. Tetranychid mite infestations were confirmed in 204 samples, and 22 species belonging to seven genera of the Bryobiinae and Tetranychinae subfamilies were identified on 58 different host plants. Thirty-six new plant hosts were found in Brazil, South America, and worldwide for the following species: Eutetranychus banksi (McGregor); Mononychellus tanajoa (Bondar); Oligonychus anonae Paschoal; O. mangiferus (Rahman and Sapra); Tetranychus bastosi Tuttle, Baker and Sales; T. desertorum Banks, 1900, T. evansi Baker and Pritchard; T. ludeni Zacher; T. mexicanus (McGregor); T. neocaledonicus André; and T. urticae Koch. Four new localities in Brazil were reported for Eotetranychus tremae De Leon; O. anonae; Panonychus ulmi (Koch); and T. gloveri Baker and Pritchard. PMID:22224405

  20. The oribatid mite genus Benoibates (Acari, Oribatida, Oripodidae)

    PubMed Central

    Ermilov, Sergey G.; Alvarado-Rodríguez, Olman; Kontschán, Jen?; Retana-Salazar, Axel P.

    2014-01-01

    Abstract Two species of oribatid mites of the genus Benoibates (Oribatida, Oripodidae), i.e., Benoibates bolivianus Balogh & Mahunka, 1969(a) and Benoibates minimus Mahunka, 1985, are recorded for the first time in Costa Rica. Both are redescribed in details, using drawings, images and SEM micrographs, on the basis of Costa Rican specimens. An identification key to the known species of Benoibates is given. PMID:25349489

  1. PCR analysis for Wolbachia in human and canine Demodex mites

    Microsoft Academic Search

    Sibylle N. Borgo; Elke C. Sattler; Michael Hogardt; Kristin Adler; Gerd Plewig

    2009-01-01

    In many skin diseases such as Demodex folliculitis, rosacea- or steroid-induced rosacea Demodex mites are present in abundance and are at least partially held responsible for causing these disorders. Although it is known\\u000a that these diseases respond well to tetracyclines, it is unclear if this is due to the antiinflammatory effects of the antibiotics\\u000a or to an antibacterial effect on

  2. Elastosis Perforans Serpiginosa in Association with Scabies Mite

    PubMed Central

    Frederickson, Julie; Griffith, Jack; Shitabata, Paul; Horowitz, David

    2013-01-01

    Elastosis perforans serpiginosa is a form of perforating dermatoses, which has a characteristic clinical presentation of grouped keratotic papules coalescing into serpiginous or annular configurations. The majority of elastosis perforans serpiginosa cases are idiopathic; however, various etiologies have been postulated for the pathogenesis of this syndrome. The authors present a unique case of elastosis perforans serpiginosa that developed focally secondary to a scabies mite. PMID:24155992

  3. Some predaceous mites [ Phytoseiidae ] on citrus in the mediterranean region

    Microsoft Academic Search

    J. A. McMurtry

    1977-01-01

    Seven species of phytoseiid mites were collected from citrus trees in the Mediterranean region during a survey in 1971.Amblyseius stipulatus\\u000a Athias-Henriot was the most abundant and widespread species in all countries surveyed (Turkey, Greece, Italy, Spain).A. californicus (McGregor) was collected only in Spain;A. potentillae (Garman) andPhytoseiulus persimilis. A.-H. only in Italy.Typhlodromus talbii A.-H. was collected in Greece and Spain,T. athiasae

  4. Phylogenetic relationships among arecoid palms (Arecaceae: Arecoideae)

    PubMed Central

    Baker, William J.; Norup, Maria V.; Clarkson, James J.; Couvreur, Thomas L. P.; Dowe, John L.; Lewis, Carl E.; Pintaud, Jean-Christophe; Savolainen, Vincent; Wilmot, Tomas; Chase, Mark W.

    2011-01-01

    Background and Aims The Arecoideae is the largest and most diverse of the five subfamilies of palms (Arecaceae/Palmae), containing >50 % of the species in the family. Despite its importance, phylogenetic relationships among Arecoideae are poorly understood. Here the most densely sampled phylogenetic analysis of Arecoideae available to date is presented. The results are used to test the current classification of the subfamily and to identify priority areas for future research. Methods DNA sequence data for the low-copy nuclear genes PRK and RPB2 were collected from 190 palm species, covering 103 (96 %) genera of Arecoideae. The data were analysed using the parsimony ratchet, maximum likelihood, and both likelihood and parsimony bootstrapping. Key Results and Conclusions Despite the recovery of paralogues and pseudogenes in a small number of taxa, PRK and RPB2 were both highly informative, producing well-resolved phylogenetic trees with many nodes well supported by bootstrap analyses. Simultaneous analyses of the combined data sets provided additional resolution and support. Two areas of incongruence between PRK and RPB2 were strongly supported by the bootstrap relating to the placement of tribes Chamaedoreeae, Iriarteeae and Reinhardtieae; the causes of this incongruence remain uncertain. The current classification within Arecoideae was strongly supported by the present data. Of the 14 tribes and 14 sub-tribes in the classification, only five sub-tribes from tribe Areceae (Basseliniinae, Linospadicinae, Oncospermatinae, Rhopalostylidinae and Verschaffeltiinae) failed to receive support. Three major higher level clades were strongly supported: (1) the RRC clade (Roystoneeae, Reinhardtieae and Cocoseae), (2) the POS clade (Podococceae, Oranieae and Sclerospermeae) and (3) the core arecoid clade (Areceae, Euterpeae, Geonomateae, Leopoldinieae, Manicarieae and Pelagodoxeae). However, new data sources are required to elucidate ambiguities that remain in phylogenetic relationships among and within the major groups of Arecoideae, as well as within the Areceae, the largest tribe in the palm family. PMID:21325340

  5. Tandem Repeat-Containing MITEs in the Clam Donax trunculus

    PubMed Central

    Šatovi?, Eva; Plohl, Miroslav

    2013-01-01

    Two distinct classes of repetitive sequences, interspersed mobile elements and satellite DNAs, shape eukaryotic genomes and drive their evolution. Short arrays of tandem repeats can also be present within nonautonomous miniature inverted repeat transposable elements (MITEs). In the clam Donax trunculus, we characterized a composite, high copy number MITE, named DTC84. It is composed of a central region built of up to five core repeats linked to a microsatellite segment at one array end and flanked by sequences holding short inverted repeats. The modular composition and the conserved putative target site duplication sequence AA at the element termini are equivalent to the composition of several elements found in the cupped oyster Crassostrea virginica and in some insects. A unique feature of D. trunculus element is ordered array of core repeat variants, distinctive by diagnostic changes. Position of variants in the array is fixed, regardless of alterations in the core repeat copy number. Each repeat harbors a palindrome near the junction with the following unit, being a potential hotspot responsible for array length variations. As a consequence, variations in number of tandem repeats and variations in flanking sequences make every sequenced element unique. Core repeats may be thus considered as individual units within the MITE, with flanking sequences representing a “cassette” for internal repeats. Our results demonstrate that onset and spread of tandem repeats can be more intimately linked to processes of transposition than previously thought and suggest that genomes are shaped by interplays within a complex network of repetitive sequences. PMID:24317975

  6. Performance Assessment Links in Math (PALM)

    NSDL National Science Digital Library

    Performance Assessment Links in Math (PALM) is an online, standards-based resource bank of mathematics performance assessment tasks, indexed via the National Council of Teachers of Mathematics (NCTM). The tasks have been collected from numerous sources. The description of each task includes student directions and response forms, administration procedures, scoring rubrics, examples of student work, and technical-quality data, calculated from field testing, when such testing has been conducted. Users may select standards and draw upon the collection of tasks to create assessment charts--matrices of tasks intended to test the standards--or select tasks to create a chart of standards that are addressed by those tasks.

  7. Mite-borne virus isolates from cultivated Allium species, and their classification into two new rymoviruses in the family Potyviridae

    Microsoft Academic Search

    P. van Dijk; M. Verbeek; I. Bos

    1991-01-01

    While testing several samples of onion and of vegetatively propagated garlic, sand leek and shallot from a number of countries,\\u000a virus isolates with unusually flexuous particles were obtained by mite (Aceria tulipae) or sap transmissions. No aphid-borne poty-or carlavirus was transmitted by mites, and mite-borne virus isolates could not\\u000a be transmitted by aphids. The mite-borne isolates did not react with

  8. The Effect of Antibiotics on Associated Bacterial Community of Stored Product Mites

    PubMed Central

    Kopecky, Jan; Nesvorna, Marta; Mareckova-Sagova, Marketa; Hubert, Jan

    2014-01-01

    Background Bacteria are associated with the gut, fat bodies and reproductive organs of stored product mites (Acari: Astigmata). The mites are pests due to the production of allergens. Addition of antibiotics to diets can help to characterize the association between mites and bacteria. Methodology and Principal Findings Ampicillin, neomycin and streptomycin were added to the diets of mites and the effects on mite population growth (Acarus siro, Lepidoglyphus destructor and Tyrophagus putrescentiae) and associated bacterial community structure were assessed. Mites were treated by antibiotic supplementation (1 mgg?1 of diet) for 21 days and numbers of mites and bacterial communities were analyzed and compared to the untreated control. Bacterial quantities, determined by real-time PCR, significantly decreased in antibiotic treated specimens from 5 to 30 times in A. siro and T. putrescentiae, while no decline was observed in L. destructor. Streptomycin treatment eliminated Bartonella-like bacteria in the both A. siro and T. putrescentiae and Cardinium in T. putrescentiae. Solitalea-like bacteria proportion increased in the communities of neomycin and streptomycin treated A. siro specimens. Kocuria proportion increased in the bacterial communities of ampicillin and streptomycin treated A. siro and neomycin and streptomycin treated L. destructor. Conclusions/Significance The work demonstrated the changes of mite associated bacterial community under antibiotic pressure in pests of medical importance. Pre-treatment of mites by 1 mgg?1 antibiotic diets improved mite fitness as indicated accelerated population growth of A. siro pretreated streptomycin and neomycin and L. destructor pretreated by neomycin. All tested antibiotics supplemented to diets caused the decrease of mite growth rate in comparison to the control diet. PMID:25387104

  9. Cheyletus eruditus (taurrus): an effective candidate for the biological control of the snake mite (Ophionyssus natricis).

    PubMed

    Schilliger, Lionel H; Morel, Damien; Bonwitt, Jesse H; Marquis, Olivier

    2013-09-01

    The most commonly encountered ectoparasite in captive snakes is the hematophagous snake mite (Ophionyssus natricis). Infected snakes often exhibit lethargy, dysecdysis, pruritus, crusting dermatitis (sometimes progressing to abscesses), and behavioral changes (increased bathing time, rubbing against objects). Anemia and septicemia are occasional complications. Eliminating snake mites from a collection is frustrating. Insecticidal and acaricidal compounds used in mammals can be used against O. natricis infestation in reptiles, but they all are potentially neurotoxic to reptiles. The use of a biological agent to control the snake mite was first developed by using the predatory mites Hypoaspis miles and Hypoaspis aculeifer. However, no data are available regarding the potential of these mites to control O. natricis. Furthermore, the survival and predatory behavior of H. aculeifer and H. miles decreases above 28 degrees C, which is the lower value of the optimal temperature zone range required for rearing snakes. The aim of this study is to identify the ability of the predatory mite Cheyletus eruditus to control O. natricis. In the first experiment, 125 O. natricis mites where placed in separate plastic tubes together with the same number of C. eruditus mites. After 48 hr, the survival rate of snake mites was 6% compared with 92% in the control group (n = 125, P < 0,001). In the second experiment, 11 infested (average of 13 O. natricis per snake) ball pythons, with an average of 13 O. natricis per individual, were placed in separate cages with 1,000 C. eruditus mites + vermiculite After 15 days, only an average of two mites per snake remained, compared with 48 per snake in the control group (t-test, P < 0,01). PMID:24063093

  10. Weed management practices affect the diversity and relative abundance of physic nut mites.

    PubMed

    de Sousa Saraiva, Althiéris; Sarmento, Renato A; Erasmo, Eduardo A L; Pedro-Neto, Marçal; de Souza, Danival José; Teodoro, Adenir V; Silva, Daniella G

    2015-03-01

    Crop management practices determine weed community, which in turn may influence patterns of diversity and abundance of associated arthropods. This study aimed to evaluate whether local weed management practices influence the diversity and relative abundance of phytophagous and predatory mites, as well as mites with undefined feeding habits-of the families Oribatidae and Acaridae-in a physic nut (Jatropha curcas L.) plantation subjected to (1) within-row herbicide spraying and between-row mowing; (2) within-row herbicide spraying and no between-row mowing; (3) within-row weeding and between-row mowing; (4) within-row weeding and no between-row mowing; and (5) unmanaged (control). The herbicide used was glyphosate. Herbicide treatments resulted in higher diversity and relative abundance of predatory mites and mites with undefined feeding habit on physic nut shrubs. This was probably due to the toxic effects of the herbicide on mites or to removal of weeds. Within-row herbicide spraying combined with between-row mowing was the treatment that most contributed to this effect. Our results show that within-row weeds harbor important species of predatory mites and mites with undefined feeding habit. However, the dynamics of such mites in the system can be changed according to the weed management practice applied. Among the predatory mites of the family Phytoseiidae Amblydromalus sp. was the most abundant, whereas Brevipalpus phoenicis was the most frequent phytophagous mite and an unidentified oribatid species was the most frequent mite with undefined feeding habit. PMID:25528451

  11. Contrasting palm species and use diversity in the Yucatan Peninsula and the Ecuadorian Amazon

    Microsoft Academic Search

    Lucía de la Torre; Luz María Calvo-Irabién; Carmen Salazar; Henrik Balslev; Finn Borchsenius

    2009-01-01

    We analyze the relationship between palm species diversity and diversity of palm use in two areas (Amazonian Ecuador; Yucatan\\u000a Peninsula) of equivalent size but with contrasting characteristics in palm species diversity and morphology, and in the phylogenetic\\u000a composition of palm flora. The areas also differ in their cultural and socioeconomic contexts. Palm use diversity is significantly\\u000a higher in the Ecuadorian

  12. Colorimetric determination of total tocopherols in palm oil, olein and stearin

    Microsoft Academic Search

    M. L. Wong; R. E. Timms; E. M. Goh

    1988-01-01

    By using a preliminary heat-bleach at 250 C the Emmerie-Engel method has been adapted for the determination of total tocopherols\\u000a (including tocotrienols) in crude as well as refined palm oil, olein and stearin. Total tocopherol contents found were: Crude\\u000a palm oil, 794 ppm (n=10); RBD palm oil, 563 ppm (n=13); RBD palm olein, 643 ppm (n=40); RBD palm stearin, 261

  13. Determination of mono- and diglycerides in palm oil, olein and stearin

    Microsoft Academic Search

    E. M. Goh; R. E. Timms

    1985-01-01

    Partial glycerides are important constituents of palm oil and can have significant effects on the physical properties of products\\u000a containing palm oil or on the fractionation of palm oil. A method is described for their routine determination in palm oil.\\u000a By analysis of 28 weekly composite samples of crude palm oil the following results were obtained: free fatty acids, mean=3.76%,

  14. Biomass residues from palm oil mills in Thailand: An overview on quantity and potential usage

    Microsoft Academic Search

    S. Prasertsan; P. Prasertsan

    1996-01-01

    Palm oil production is one of the major industries in the south of Thailand. A study of the quantity and potential usage of palm oil mill wastes was carried out. Sixteen palm oil mills in the region generate 386,930 tons\\/yr 165,830 tons\\/yr and 110,550 tons\\/yr of empty fruit bunches, palm press fiber and palm kernel shell, respectively. In addition, 1,202,260

  15. Polymorphic stability of hydrogenated canola oil as affected by addition of palm oil

    Microsoft Academic Search

    P. H. Yap; J. M. deMan; L. deMan

    1989-01-01

    Palm oil was added to canola oil before and after hydrogenation and the effect of this addition on the polymorphic stability\\u000a of the hydrogenated oils was investigated. Palm oil was added to canola oil at two levels to produce hydrogenated canola and\\u000a palm oil blends containing 5 and 10% palm oil. The levels of palm oil added to hydrogenated canola

  16. Evaluation of possible arrestant-aggregation pheromones in the American house dust mite, Dermatophagoides farinae Hughes (astigmata: Pyroglyphidae)

    Microsoft Academic Search

    Emmett V. Glass; Jay A. Yoder; Glen R. Needham

    2001-01-01

    We wanted to determine if a chemical substance was responsible for cluster formation by adults of the American house dust mite, Dermatophagoides farinae Hughes, which are significant agents of dust allergy in humans. Behavioral responses to an extract of aggregated mites were compared to 30 common mite attractants identified in cuticular lipids, excretory products and mammalian skin in a refined

  17. Abundance of phytoseiid mites on Vitis species: effects of leaf hairs, domatia, prey abundance and plant phylogeny

    Microsoft Academic Search

    Richard Karban; Gregory English-Loeb; M. Andrew Walker; Jennifer Thaler

    1995-01-01

    We observed the number of predatory mites (Phytoseiidae:Typhlodromus caudiglans) on the foliage of 20 North American species of grapes (Vitis spp) plus the domesticated EuropeanVitis vinifera, all grown in a common garden. We found relatively few phytophagous mites. The numbers of phytophagous mites were not correlated with the plant characteristics that we measured. We found approximately five times as many

  18. House dust mite ( Dermatophagoides farinae and Dermatophagoides pteronyssinus) prevalence in the rooms and hallways of a tertiary care hospital

    Microsoft Academic Search

    Kenneth S. Babe; Larry G. Arlian; Patricia D. Confer; Richard Kim

    1995-01-01

    Background: House dust mites, Dermatophagoides farinae and Dermatophagoides pteronyssinus, are important components in the development of asthma. Objective: We measured the prevalence of house dust mites in a tertiary care hospital located in a temperate geographic region where dust mites were prevalent in homes. Methods: The density of Dermatophagoides spp. was measured in hospital hallways, carpeted patients' rooms, and noncarpeted

  19. A Major House Dust Mite Allergen Disrupts the Immunoglobulin E Network by Selectively Cleaving CD23: Innate Protection by Antiproteases

    Microsoft Academic Search

    Colin R. A. Hewitt; Alan R Brown; Barbara J. Hart; David I. Pritchard

    1995-01-01

    SumlTlary Asthma is a chronic life-threatening disease of worldwide importance. Although allergic asthma and related atopic conditions correlate strongly with immune sensitization to house dust mites, it is unclear why antigens from mites provoke such powerful allergic immune responses. We have characterized the protease activity of Der p I, the group I protease allergen of the house dust mite Dermatophagoides

  20. Species and sex biases in ectoparasitism of dragonflies by mites Marc J. Lajeunesse, Mark R. Forbes and Bruce P. Smith

    E-print Network

    Species and sex biases in ectoparasitism of dragonflies by mites Marc J. Lajeunesse, Mark R. Forbes in ectoparasitism of dragonflies by mites. Á/ Oikos 106: 501Á/508. An important problem in understanding on the patterns of host use and successful parasitism of two dragonfly species by the ectoparasitic water mite

  1. A Sequential Sampling Scheme for Detecting Infestation Levels of Tracheal Mites (Heterostigmata: Tarsonemidae) in Honey Bee (Hymenoptera: Apidae) Colonies

    Microsoft Academic Search

    Maryann T. Frazier; Jennifer Finley; William Harkness; Edwin G. Rajotte

    2000-01-01

    The introduction of parasitic honey bee mites, the tracheal mite, Acarapis woodi (Rennie) in 1984 and the Varroa mite, Varroa jacobsoni, in 1987, has dramatically increased the winter mortality of honey bee, Apis mellifera L., colonies in many areas of the United States. Some beekeepers have minimized their losses by routinely treating their colonies with menthol, currently the only Environmental

  2. Molecular defense response of oil palm to Ganoderma infection.

    PubMed

    Ho, C-L; Tan, Y-C

    2014-11-12

    Basal stem rot (BSR) of oil palm roots is due to the invasion of fungal mycelia of Ganoderma species which spreads to the bole of the stem. In addition to root contact, BSR can also spread by airborne basidiospores. These fungi are able to break down cell wall components including lignin. BSR not only decreases oil yield, it also causes the stands to collapse thus causing severe economic loss to the oil palm industry. The transmission and mode of action of Ganoderma, its interactions with oil palm as a hemibiotroph, and the molecular defence responses of oil palm to the infection of Ganodermaboninense in BSR are reviewed, based on the transcript profiles of infected oil palms. The knowledge gaps that need to be filled in oil palm-Ganoderma molecular interactions i.e. the associations of hypersensitive reaction (HR)-induced cell death and reactive oxygen species (ROS) kinetics to the susceptibility of oil palm to Ganoderma spp., the interactions of phytohormones (salicylate, jasmonate and ethylene) at early and late stages of BSR, and cell wall strengthening through increased production of guaiacyl (G)-type lignin, are also discussed. PMID:25457484

  3. THE USAGE OF EMPTY FRUIT BUNCH (EFB) AND PALM PRESSED FIBRE (PPF) AS SUBSTRATES FOR THE CULTIVATION OF PLEUROTUS OSTREATUS

    Microsoft Academic Search

    AMAL NAFISSA MOHD TABI; FATHIE AHMAD ZAKIL; WAN NUR FAUZAN MOHD FAUZAI; NOORHALIEZA ALI; ONN HASSAN

    At present Malaysia is the largest exporter of palm oil in the international market. In the process of extraction of palm oil from oil palm fruit, biomass materials such as palm empty fruit bunch (EFB) and palm pressed fibre (PPF) are generated as waste products. This research was undertaken to evaluate the use of empty fruit bunch (EFB) and shredded

  4. solution is the selective breeding of honey bees to produce bees that suppress mite

    E-print Network

    Boyer, Edmond

    solution is the selective breeding of honey bees to produce bees that suppress mite reproduction [8). This is a heritable 1. INTRODUCTION Long-term solutions to the parasitism of honey bees by the mite, Varroa destructor]. One Original article Changes in reproduction of Varroa destructor after honey bee queens were

  5. Mite-Mediated Hyperphoretic Dispersal of Ophiostoma spp. from the Infructescences of South African Protea spp.

    E-print Network

    BEHAVIOR Mite-Mediated Hyperphoretic Dispersal of Ophiostoma spp. from the Infructescences of South species of Gondwanamyces G. J. Marais and M. J. Wingf., and Ophiostoma Syd. and P. Syd. occur in the ßoral that Ophiostoma found in Protea ßower-heads are vectored by mites (Acarina) including species of: Tarsonemus

  6. Pyemotes herfsi (Acari: Pyemotidae), a mite new to North America as the cause of bite outbreaks.

    PubMed

    Broce, Alberto B; Zurek, Ludek; Kalisch, James A; Brown, Robert; Keith, David L; Gordon, David; Goedeke, Janis; Welbourn, Cal; Moser, John; Ochoa, Ronald; Azziz-Baumgartner, Eduardo; Yip, Fuyuen; Weber, Jacob

    2006-05-01

    High incidences of red, itching, and painful welts on people in the midwestern United States led to the discovery of a European species of mite, Pyemotes herfsi (Oudemans) (Acari: Pyemotidae), preying on gall-making midge larvae on oak leaves. The mites' great reproductive potential, small size, and high capacity for dispersal by wind make them difficult to control or avoid. PMID:16739423

  7. A Scientific note on Varroa mites found in East Africa; Threat or Opportunity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Varroa mites have devastated Apis mellifera L. honeybee populations wherever they co-occur around the world, yet in East Africa these mites may have finally met their match. Varroa destructor Anderson and Truman (Acari:Varroidae) was found in Kenya and Tanzania for the first time in early 2009, but...

  8. Age and reproductive status of adult Varroa mites affect grooming success of honey bees.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This study evaluated for the first time the grooming response of honey bees to different ages and reproductive statuses of varroa mites in the laboratory. Plastic cages containing a section of dark comb and about 200 bees were inoculated with groups of four different classes of mites: gravid, phoret...

  9. AN ASSOCIATION IN HONEY BEES BETWEEN AUTOGROOMING AND THE PRESENCE OF MIGRATING TRACHEAL MITES.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Autogrooming has been suggested as a mechanism used by honey bees to resist infestation by tracheal mites. Bees are thought to groom chiefly by using the mesothoracic legs to remove migrating female mites from the thorax before the parasites enter the prothoracic spiracles. Bees in a highly infest...

  10. Diagnostic genetic test for the honey bee tracheal mite, Acarapis woodi

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The tracheal mite, Acarapis woodi, has become a worldwide pest of honey bees. Identification and description of A. woodi is hampered by the minute size of these mites, their cryptic lifestyle, and a general lack of strong morphological differences with relatives. Here we describe a diagnostic gene...

  11. In vitro T-lymphocyte response and house dust mite–induced bronchoconstriction

    Microsoft Academic Search

    Jung Hyun Chang; Henry Chan; Santiago Quirce; Tiffinie Green; Kukuh Noertjojo; Stephen Lam; Anthony Frew; Paul Keown; Moira Chan-Yeung

    1996-01-01

    Background: There is considerable evidence that T cells may play an important role in asthma. The purpose of this study was to determine whether the responsiveness of T lymphocytes to mite allergen stimulation in vitro is a determinant of bronchial response to house dust mite (HDM) allergen challenge in subjects who are allergic to HDM. Methods: Peripheral blood was taken

  12. Parasitic mites of medical and veterinary importance--is there a common research agenda?

    PubMed

    Fischer, Katja; Walton, Shelley

    2014-10-15

    There are an estimated 0.5-1 million mite species on earth. Among the many mites that are known to affect humans and animals, only a subset are parasitic but these can cause significant disease. We aim here to provide an overview of the most recent work in this field in order to identify common biological features of these parasites and to inform common strategies for future research. There is a critical need for diagnostic tools to allow for better surveillance and for drugs tailored specifically to the respective parasites. Multi-'omics' approaches represent a logical and timely strategy to identify the appropriate mite molecules. Recent advances in sequencing technology enable us to generate de novo genome sequence data, even from limited DNA resources. Consequently, the field of mite genomics has recently emerged and will now rapidly expand, which is a particular advantage for parasitic mites that cannot be cultured in vitro. Investigations of the microbiota associated with mites will elucidate the link between parasites and pathogens, and define the role of the mite in transmission and pathogenesis. The databases generated will provide the crucial knowledge essential to design novel diagnostic tools, control measures, prophylaxes, drugs and immunotherapies against the mites and associated secondary infections. PMID:25218570

  13. Fecundity in Twospotted Spider Mite (Acari: Tetranychidae) is Increased by Direct and Systemic Exposure to Imidacloprid

    Microsoft Academic Search

    David G. James; Tanya S. Price

    2002-01-01

    The effect of imidacloprid on fecundity in twospotted spider mites, Tetranychus urticae Koch, was investigated in laboratory experiments using individual females on bean leaf discs. Mites were directly exposed to spray formulations of imidacloprid or fed on discs cut from a systemically treated bean plant. Imidacloprid-treated T. urticae produced 10 Đ26% more eggs during the Ţrst 12 d of adult

  14. Communication via sex pheromones within and among Arrenurus spp. mites (Acari: Hydrachnida;

    E-print Network

    -1 Communication via sex pheromones within and among Arrenurus spp. mites (Acari: Hydrachnida-607-274-1131) Key words: Arrenuridae, Mating behaviour, Sex pheromone, Water mite Abstract. We present direct experimental evidence of pheromone use in six species of Arrenurus and indirect evidence for four species

  15. Mites (Arachnida: Acari) inhabiting coffee domatia: a short review and recent findings from Costa Rica.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Six previously unreported domatia-inhabiting mites are reported from Coffea arabica accessions planted in Costa Rica. One of these is a new species of Asca found to be carrying fungal spores on its cuticle. A review of the literature on mites in coffee domatia is presented....

  16. USE OF LOW TEMPERATURE SCANNING ELECTRON MICROSCOPY FOR IDENTIFYING INVASIVE MITE SPECIES.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Low temperature scanning electron microscopy (LTSEM) has become a popular technique for studying morphology of mites. This paper addresses the use of LTSEM as a tool to better identify and understand variation in the dorsal morphology of invasive mites caused by different media preparation or mount...

  17. Immunologic Characterization and Allergenicity of Recombinant Tyr p 3 Allergen from the Storage Mite Tyrophagus putrescentiae

    Microsoft Academic Search

    En-Chih Liao; Err-Lieh Hsu; Jaw-Ji Tsai; Chau-Mei Ho

    2009-01-01

    Background: The involvement of the storage mite Tyrophagus putrescentiae in allergies has been increasingly reported in many countries. Molecular analysis has shown that group 3 mite allergens are homologous to trypsin. Similar allergens have not been identified in T. putrescentiae. Our aims were to characterize group 3 allergens in T. putrescentiae and to investigate their significance in allergenicity. Methods: cDNAs

  18. Ophiostoma gemellus and Sporothrix variecibatus from mites infesting Protea infructescences in South Africa

    E-print Network

    ) regions. DNA sequences of S. variecibatus were identical to those of a Sporothrix isolate obtained from recent studies have considered the possible role of insects and mites in the distribution. with affinities to Ophiostoma, both initially isolated from mites associated with Protea spp. They are described

  19. Tracking predation of subterranean pests: digestion of corn rootworm DNA by a generalist mite

    Technology Transfer Automated Retrieval System (TEKTRAN)

    qPCR is a useful tool for understanding predator-prey relationships. We investigated rootworm DNA digestion by male and female predatory mites. Males and females initially consumed comparable amounts of DNA, which was digested at similar rates. Field-collected mites need to be preserved quickly for ...

  20. Influence of leaf trichomes on predatory mite (Typhlodromus pyri) abundance in grape varieties.

    PubMed

    Loughner, R; Goldman, K; Loeb, G; Nyrop, J

    2008-08-01

    Non-glandular leaf trichomes positively influence the abundance of many phytoseiid mites. We characterized the influence of grape leaf trichomes (domatia, hairs, and bristles) on Typhlodromus pyri Scheuten abundance over two years in a common garden planting of many grape varieties and 2 years of sampling in a commercial vineyard. In general, a lack of trichomes was associated with much lower predator numbers and in the case of Dechaunac, a cultivar with almost no trichomes, very few T. pyri were found. Phytoseiid abundance was best predicted by a model where domatia and hair had an additive effect (r (2) = 0.815). Over two years of sampling at a commercial vineyard there were T. pyri present on all of the 5 cultivars except Dechaunac. At the same time, European red mite prey were present on Dechaunac alone. These results suggest that on grape cultivars lacking leaf trichomes, T. pyri likely will not attain sufficient densities to provide biological control of European red mite, despite presence of the mite food source. The relationship between leaf trichomes and phytoseiid abundance that is observed at the scale of single vines in a garden planting appears to also be manifest at the scale of a commercial vineyard. Because persistence of predatory mites in or nearby the habitats of prey mites is important for effective mite biological control, leaf trichomes, through their influence on phytoseiid persistence, may be critical for successful mite biological control in some systems. PMID:18683057

  1. Gene Pyramiding of Peptidase Inhibitors Enhances Plant Resistance to the Spider Mite Tetranychus urticae

    Microsoft Academic Search

    Maria Estrella Santamaria; Inés Cambra; Manuel Martinez; Clara Pozancos; Pablo González-Melendi; Vojislava Grbic; Pedro Castańera; Felix Ortego; Isabel Diaz

    2012-01-01

    The two-spotted spider mite Tetranychus urticae is a damaging pest worldwide with a wide range of host plants and an extreme record of pesticide resistance. Recently, the complete T. urticae genome has been published and showed a proliferation of gene families associated with digestion and detoxification of plant secondary compounds which supports its polyphagous behaviour. To overcome spider mite adaptability

  2. Colonization of Languedoc vineyards by phytoseiid mites (Acari: Phytoseiidae): influence of wind and crop environment

    Microsoft Academic Search

    Marie-Stéphane Tixier; Serge Kreiter; Philippe Auger; Marc Weber

    1998-01-01

    A natural increase of phytoseiid mite populations (Kampimodromus aberrans, Typhlodromus pyri and Phytoseius plumifer) was observed in vineyards in Languedoc, Burgundy and Corsica under integrated pest management strategies. The aim of the present study was to characterize the mechanisms of this colonization in space and time in Languedoc. The abundance of phytoseiid mites in the vegetation close to three grape

  3. Parasitism of Sympetrum dragonflies by Arrenurus planus mites: maintenance of resistance particular to one species

    Microsoft Academic Search

    Mark R. Forbes; Katherine E. Muma; Bruce P. Smith

    1999-01-01

    Using field surveys and histological methods, we show that a dragonfly species (Sympetrum internum) has an effective resistance, not seen previously in other odonates, to a mite parasite (Arrenurus planus). This mite is a generalist parasite known to effectively engorge on several other odonate species. We argue that selection is likely weak, favouring counter adaptations of Arrenurus planus to Sympetrum

  4. Molecular genetic analysis of tracheal mite resistance of colonies and individual honey bees

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Honey bee resistance to the potentially damaging parasitic tracheal mite is known to be mediated by autogrooming. During autogrooming bees use their midlegs to remove migrating foundress mites, thereby reducing infestation rates in their trachea. We investigated the relationship between markers iden...

  5. Exposure to house dust mite allergens and the clinical activity of asthma

    Microsoft Academic Search

    Adnan Custovic; Simon C. O. Taggart; Helen C. Francis; Martin D. Chapman; Ashley Woodcock

    1996-01-01

    Background: House dust mite allergens play an important role in inducing IgE-mediated sensitization and the development of bronchial hyperresponsiveness (BHR) and asthma. This study investigated the relationship between mite allergen exposure and the clinical activity and severity of asthma. Methods: Nonsmoking adult patients with asthma (n = 53) were randomly recruited from the asthma registry of two large family practitioner

  6. The Crystal Structure of a Major Dust Mite Allergen Der p 2, and its Biological Implications

    E-print Network

    The Crystal Structure of a Major Dust Mite Allergen Der p 2, and its Biological Implications U 15213, USA The crystal structure of the common house mite (Dermatophagoides sp.) Der p 2 allergen function of the Der p 2 protein. q 2002 Elsevier Science Ltd. All rights reserved Keywords: allergen

  7. Induced Resistance and Interspecific Competition between Spider Mites and a Vascular Wilt Fungus

    Microsoft Academic Search

    Richard Karban; Rodney Adamchak; William C. Schnathorst

    1987-01-01

    The fungal pathogen Verticillium dahliae was less likely to cause symptoms of verticillium wilt on cotton seedlings that had been previously exposed to spider mites than on unexposed cotton seedlings. Conversely, populations of the spider mite Tetranychus urticae grew less rapidly on seedlings that had been inoculated with V. dahliae than on uninoculated controls. Changes caused by pathogen or herbivore

  8. “Inert” Formulation Ingredients with Activity: Toxicity of Trisiloxane Surfactant Solutions to Twospotted Spider Mites (Acari: Tetranychidae)

    Microsoft Academic Search

    R. S. Cowles; E. A. Cowles; A. M. McDermott; D. Ramoutar

    2000-01-01

    Organosilicone molecules are important surfactant ingredients used in formulating pesticides. These methylated silicones are considered inert ingredients, but their superior surfactant properties allow them to wet, and either suffocate or disrupt important physiological processes in mites and insects. Aqueous solutions of the trisiloxane surfactants Silwet L-77, Silwet 408, and Silwet 806 were bioassayed against adult female twospotted spider mites, Tetranychus

  9. Does benzyl benzoate prevent colonization of new mattresses by mites? A prospective study.

    PubMed

    Rebmann, H; Weber, A K; Focke, I; Rusche, A; Lau, S; Ehnert, B; Wahn, U

    1996-12-01

    In 12 house-dust-mite-infested double beds, one of the mattresses was replaced by a new one, the other being regarded as a mite source. All new mattresses were treated in a double-blind fashion, with either benzyl benzoate or placebo before being placed on the bed as well as 1 year later. They were examined for mites and allergen concentrations over a period of 18 months. This period of time covered two mite seasons. Dust samples were taken bimonthly and analyzed by guanine test strip, microscopic mite counting, and determination of the mite allergens Der p 1 (Dermatophagoides pteronyssinus) and Der f 1 (D. farinae) by ELISA. Although, at the end of the observation period, the new mattresses still had significantly lower mite and allergen levels than the old mattresses, there were no significant differences between the placebo and the benzyl benzoate groups. In our setting, benzyl benzoate plus frequent cleansing was not significantly more effective in controlling mites than frequent cleansing alone. PMID:9020414

  10. Semiochemical parsimony between the Madagascar hissing-cockroach mite and its host

    Microsoft Academic Search

    Jay A. Yoder; Syed S. Mahmood; Peter N. Lalli

    2001-01-01

    The behavior of conspecific mites (Gromphadorholaelaps schaeferi Till) on the giant Madagascar hissing-cockroach was explored by examining responses towards one another and towards their lipid extracts. Because mites did not display significant attraction or repelling behaviors characteristic of assembly, aggregation, alarm, or sex pheromone production, their occurrence is likely attributed to the behavior-modifying attractive properties of the cockroach's unique musty

  11. Evaluation of Beauveria bassiana (Balsamo) Vuillemin (Deuteromycota: Hyphomycetes) strains isolated from varroa mites in southern France

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Entomopathogenic fungi are currently being considered as alternatives to chemical pesticides for controlling varroa mites of honey bees. Varroa mites were collected from 112 beehives in southern France and evaluated for the presence of entomopathogenic fungi. Eight strains of Beauveria bassiana we...

  12. Characterization of a Group of MITEs with Unusual Features from Two Coral Genomes

    PubMed Central

    Wang, Shi; Zhang, Lingling; Meyer, Eli; Matz, Mikhail V.

    2010-01-01

    Background Miniature inverted-repeat transposable elements (MITEs), which are common in eukaryotic genomes, are small non-coding elements that transpose by utilizing transposases encoded by autonomous transposons. Recent genome-wide analyses and cross-mobilization assays have greatly improved our knowledge on MITE proliferation, however, specific mechanisms for the origin and evolution of MITEs are still unclear. Principal Findings A group of coral MITEs called CMITE were identified from two corals, Acropora millepora and Acropora palmata. CMITEs conform to many common characteristics of MITEs, but also present several unusual features. The most unusual feature of CMITEs is conservation of the internal region, which is more conserved between MITE families than the TIRs. The origin of this internal region remains unknown, although we found one CMITE family that seems to be derived from a piggyBac-like transposon in A. millepora. CMITEs can form tandem arrays, suggesting an unconventional way for MITEs to increase copy numbers. We also describe a case in which a novel transposable element was created by a CMITE insertion event. Conclusions To our knowledge, this is the first report of identification of MITEs from coral genomes. Proliferation of CMITEs seems to be related to the transposition machinery of piggyBac-like autonomous transposons. The highly conserved internal region of CMITEs suggests a potential role for this region in their successful transposition. However, the origin of these unusual features in CMITEs remains unclear, and thus represents an intriguing topic for future investigations. PMID:20502527

  13. OUTBREAKS OF ITCHING BITES IN THE MIDWESTERN USA CAUSED BY AN INTRODUCED SPECIES OF ITCH MITE

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Several reports of high incidences of red, itching and painful welts on people in different areas of the midwestern USA led to the discovery of an European species of itch mite, Pyemotes herfsi (Oudemans 1936), preying on gall-making midge larvae on oak leaves. The mite's great reproductive potenti...

  14. The cereal rust mite, Abacarus hystrix, cannot be used for biological control of quackgrass

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Quackgrass, Elymus repens, is a perennial grass spreading by vigorous underground rhizomes. Because of its capacity for rapid spread and persistence it is considered as a common weed in many settings worldwide. The cereal rust mite (CRM) Abacarus hystrix is a polyphagous, phytophagous mite attacking...

  15. Pyroglyphid mites, xerophilic fungi and allergenic activity in dust from hospital mattresses.

    PubMed

    v d Lustgraaf, B; Jorde, W

    1977-12-01

    Dust from mattresses of different composition and age was analysed for mites, xerophilic fungi and allergenic activity. The mites of the genus Demodex were the most abundant (58.2 per cent). Also pyroglyphid mites occurred commonly (36.6 per cent). Pyroglyphid mites were present in small numbers (mean: 1 specimen/0.2 g of dust) in 12 out of the 17 older polyester-foam mattresses. The 11 cotton-horsechair mattresses and the newly used polyester-foam mattresses (three tested) were without them. The dust from the cotton-horsehair mattresses had a significantly higher allergenic activity than from those of polyester-foam. Xerophilic fungi were isolated in three out of 31 mattresses. The species isolated belonged to the genus Aspergillus and Eurotium. E. repens occurred most frequently. Disinfection of mattresses was suggested to have a negative influence on the occurrence of mites and fungi. PMID:579540

  16. Identification of miniature inverted-repeat transposable elements (MITEs) and biogenesis of their siRNAs in the Solanaceae: New functional implications for MITEs

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Small RNAs regulate the genome by guiding transcriptional and post-transcriptional silencing machinery to specific target sequences, including genes and transposable elements (TEs). Although miniature inverted-repeat transposable elements (MITEs) are closely associated with euchromatic genes, the br...

  17. The function of bleaching earths in the processing of palm, palm kernel and coconut oils

    Microsoft Academic Search

    D. A. Morgan; D. B. Shaw; M. J. Sidebottom; T. C. Soon; R. S. Taylor

    1985-01-01

    The results presented in the literature, which attempt to elucidate the mechanisms by which triglyceride oils are bleached\\u000a by earths, are reviewed. The impact of this work and how the mechanistic proposals affect changes in oil properties are considered,\\u000a with particular emphasis on the needs of the palm oil processor. Important properties include color, metals and phosphorus\\u000a content and oxidative

  18. Rapid method for the detection of storage mites in cereals: feasibility of an ELISA based approach.

    PubMed

    Dunn, J A; Thind, B B; Danks, C; Chambers, J

    2008-04-01

    This paper describes the development of rapid immunodiagnostic tests for the detection of storage mite infestations in cereals and cereal products. The study's first phase (proof of concept) involved the production of a species-specific enzyme-linked immunoassay (ELISA) for the flour mite, Acarus siro (L.), a major pest of stored commodities. The specificity of this new assay was assessed against key stored product contaminants (13 species of mites of which three were predatory, five species of insects and five species of fungi) in the presence and absence of grain. The assay was species-specific (no cross-reactivity to other storage contaminants) and was unaffected by the presence of cereal antigens in the extract. In the study's second phase, species- and genera-specific ELISAs were developed for a range of key storage mite pests: the cosmopolitan food mite (Lepidoglyphus destructor), the grocers' itch mite (Glycyphagus domesticus), the grainstack mite (Tyrophagus longior), mites of the Tyrophagus and Glycyphagus generas, and all storage mites. All tests were demonstrably specific to target species or genera, with no cross-reactions observed to other storage pest contaminants or cereals. The final, validation phase, involved a comparative assessment of the species-specific A. siro and the genus-specific Tyrophagus ELISAs with the flotation technique using laboratory and field samples. Both ELISAs were quantitative (0-30 mites per 10 g wheat) and produced good comparative data with the flotation technique (A. siro r(2)=0.91, Tyrophagus spp. r(2)=0.99). PMID:18279566

  19. Distribution patterns and environmental correlates of water mites (Hydrachnidia, Acari) in peatland microhabitats.

    PubMed

    Wi?cek, Mariusz; Martin, Peter; G?bka, Maciej

    2013-10-01

    In Europe peatlands are wetlands of postglacial origin. Because of climatic changes and agricultural activities (i.e. drainage and peat extraction), they are one of the most endangered ecosystems worldwide. Water mites are well known as indicators of changing environments in other ecosystems such as springs and lakes. For our study we selected seven peatlands located in North-Western Poland and focused on water mite distribution and associated habitat and water quality variables. We described water mite fauna in various microhabitats (aquatic and semiaquatic) along the mineral-richness gradient to test whether this gradient is reflected in the composition of water mite assemblages. We selected conductivity, pH and vegetation as variables reflecting the poor-rich gradient. Additionally, we measured water depth, temperature and dissolved oxygen, which are often important parameters for water mites. We also noted presence of prey and host taxa of particular water mite species. Based on physicochemical parameters we identified three types of habitats harbouring three distinctive species groups of water mites. We were able to distinguish species that appear to be typical of spring fens (e.g. Hygrobates norvegicus, Lebertia separata), connected with acidic, nutrient poor pools (e.g. Arrenurus neumani, A. pustulator) and species seemingly typical of temporary habitats dominated by Sphagnum mosses (e.g. Piersigia intermedia, Zschokkea oblonga, A. stecki). The poor-rich gradient is strongly reflected in the composition of water mite assemblages. We also found strong correlations between the water mite fauna and both conductivity and pH gradient. Our results show that water conductivity is the most important of the examined factors, driving mite-species distribution in peatlands. PMID:23564226

  20. Are soil mite assemblages structured by the identity of native and invasive alien grasses?

    PubMed

    St John, Mark G; Wall, Diana H; Hunt, H William

    2006-05-01

    Associations between plants and animals in aboveground communities are often predictable and specific. This has been exploited for the purposes of estimating the diversity of animal species based on the diversity of plant species. The introduction of invasive alien plants into an ecosystem can result in dramatic changes in both the native plant and animal assemblages. Few data exist at the species level to determine whether belowground animal assemblages share the same degree of association to plants. The hypotheses that soil mites (Acari) form assemblages specifically associated with different native grass species in an unmanipulated natural ecosystem and that invasive alien grasses will impact soil mite assemblage composition in this setting were tested. Soil mites sampled beneath five native and two invasive alien species of grasses at the Konza Prairie Biological Station, Kansas, USA, were similarly abundant, species rich, diverse, and taxonomically distinct. No mite species had affinities for a specific grass species. There was no evidence from analysis of similarity, canonical correspondence analysis, or a nonparametric assemblage analysis that the assemblage composition of soil mites was specific to grass species. Results suggest that soil mite assemblages were more related to characteristics of the plant assemblage as a whole or prevailing soil conditions. The most recent invasive alien grass did not support a successionally younger mite fauna, based on the ratio of mesostigmatid to oribatid mites, and neither of the two invasive grasses influenced mite assemblage structure, possibly because they had not yet substantially altered the soil environment. Our results suggest that extrapolations of soil mite diversity based on assumptions of plant specificity would be invalid. PMID:16761609

  1. Mites and fungi in heavily infested stores in the Czech Republic.

    PubMed

    Hubert, J; Stejskal, V; Munzbergová, Z; Kubátová, A; Vánová, M; Zd'árková, E

    2004-12-01

    Toxigenic and allergen-producing fungi represent a serious hazard to human food and animal feed safety. Ninety-four fungal species were isolated from mite-infested samples of seeds taken from Czech seed stores. Fungi were isolated from the surface of four kinds of seeds (wheat, poppy, lettuce, and mustard) and from the gut and external surface of five species of mites (i.e., Acarus siro L., 1758, Caloglyphus rhizoglyphoides (Zachvatkin, 1973), Lepidoglyphus destructor (Schrank, 1781), Tyrophagus putrescentnae (Schrank, 1781) and Cheyletus malaccensis Oudemans 1903) separately. Multivariate analysis of fungi complex composition showed that the frequency of fungal was species significantly influenced by the kind of seed. Fungal frequencies differed between mites gut and exoskeleton surface and between the surfaces of mites and seeds. Three groups of fungal species were recognized: 1) mite surface-associated fungi: Penicillium brevicompactum, Alternaria alternata, and Aspergillus versicolor; 2) mite surface- and seed-associated fungi: Aspergillus niger, Penicillium crustosum, Penicillium aurantiogriseum, Penicillium chrysogenum, and Aspergillus flavus; and 3) seed-associated fungi: Cladosporium herbarum, Mucor dimorphosporus f. dimorphosporus, Botrytis cinerea, Penicillium griseofulvum, and Eurotium repens. Mite-carried species of microfungi are known to produce serious mycotoxins (e.g., aflatoxin B1, cyclopiazonic acid, sterigmatocystin, ochratoxin A, and nephrotoxic glycopeptides) as well as allergen producers (e.g., A. alternata and P. brevicompactum). Storage mites may play an important role in the spread of some medically hazardous micromycetes. In addition, these mite-fungi associations may heighten the risk of occurrence of mycotoxins in food and feed stuffs and cause mixed contamination by fungal and mite allergens. PMID:15666776

  2. effects of neem (Azadirachta indica) seed kernel extracts from different solvents on the predacious mite Phytoseiulus persimilis and the phytophagous mite Tetranychus cinnabarinus

    Microsoft Academic Search

    F. Mansour; K. R. S. Ascher; N. Omari

    1987-01-01

    The effects of neem seed kernel extracts from different solvents on the predacious mitePhytoseiulus persimilis Athias-Henriot and the phytophagous miteTetranychus cinnabarinus (Boisd.) were compared. All extracts were much more toxic to the latter pest than to the former. Using the respective LC50 for the two species, the toxicity index (LC50\\u000a Phytoseiulus\\/LC50\\u000a Tetranychus) was found to be 3 for the methanol,

  3. [Oxidation of luminol with peroxidase from royal palm leaves].

    PubMed

    Alpeeva, I S; Sakharov, I Iu

    2007-01-01

    We optimized the conditions for luminol oxidation by hydrogen peroxide in the presence of peroxidase (EC 1.11.1.7) from royal palm leaves (Roystonea regia). The pH range (8.3-8.6) corresponding to maximum chemiluminescence was similar for palm tree peroxidase and horseradish peroxidase. Variations in the concentration of the Tris buffer were accompanied by changes in chemiluminescence. Note that maximum chemiluminescence was observed in the 30 mM solution. The detection limit of the enzyme assay during luminol oxidation by hydrogen peroxide was 1 pM. The specific feature of palm tree peroxidase was the generation of a long-term chemiluminescent signal. In combination with the data on the high stability of palm tree peroxidase, our results indicate that this enzyme is promising for its use in analytical studies. PMID:17345855

  4. Oil palm phenolics suppresses oxidative stress and inflammation

    E-print Network

    Sundaresan, Abaya Meenakshi

    2013-01-01

    Water-soluble Oil Palm Phenolics (OPP), derived from Elaeis guineensis, contains a unique blend of plant phenolics. Recent cell and animal studies have demonstrated positive health benefits in a number of different organ ...

  5. Elliptic Curve Cryptography on a Palm OS Andre Weimerskirch1

    E-print Network

    for Personal Digital Assistants (PDA) is growing rapidly and PDAs are becoming increasingly interesting Curves, Koblitz Curves, Binary Fields, Palm OS 1 Introduction The market for Personal Digital Assistants

  6. VIEW OF DATE DRIVE, SHOWING ROYAL PALMS ALONG THE STREET. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF DATE DRIVE, SHOWING ROYAL PALMS ALONG THE STREET. VIEW FACING EAST - Camp H.M. Smith and Navy Public Works Center Manana Title VII (Capehart) Housing, Intersection of Acacia Road and Brich Circle, Pearl City, Honolulu County, HI

  7. Isolation and purification of D-mannose from palm kernel.

    PubMed

    Zhang, Tao; Pan, Ziguo; Qian, Chao; Chen, Xinzhi

    2009-09-01

    An economically viable procedure for the isolation and purification of d-mannose from palm kernel was developed in this research. The palm kernel was catalytically hydrolyzed with sulfuric acid at 100 degrees C and then fermented by mannan-degrading enzymes. The solution after fermentation underwent filtration in a silica gel column, desalination by ion-exchange resin, and crystallization in ethanol to produce pure d-mannose in a total yield of 48.4% (based on the weight of the palm kernel). Different enzymes were investigated, and the results indicated that endo-beta-mannanase was the best enzyme to promote the hydrolysis of the oligosaccharides isolated from the palm kernel. The pure d-mannose sample was characterized by FTIR, (1)H NMR, and (13)C NMR spectra. PMID:19631314

  8. Oil palm vegetation liquor: a new source of phenolic bioactives

    E-print Network

    Sambandan, T. G.

    Waste from agricultural products represents a disposal liability, which needs to be addressed. Palm oil is the most widely traded edible oil globally, and its production generates 85 million tons of aqueous by-products ...

  9. Regulation of the external mycoflora of the giant Madagascar hissing-cockroach, gromphadorhina portentosa , by its mite associate, gromphadorholaelaps schaeferi , and its implications on human health

    Microsoft Academic Search

    Jay A. Yoder; Michael J. Chambers; Michael R. Condon; Joshua B. Benoit; Lawrence W. Zettler

    2009-01-01

    The giant Madagascar hissing-cockroach,Gromphadorhina portentosa, and its mite associate,Gromphadorholaelaps schaeferi, constitute an intimate commensalistic symbiosis. While the mite’s very survival is dependent by feeding on cockroach saliva\\u000a and associated organic debris, the degree that the cockroach benefits from this association is unclear. We investigated the\\u000a mite’s potential role at regulating surface fungi on the exoskeletons of this insect. Numbers of

  10. The effect of sub-floor heating on house-dust-mite populations on floors and in furniture.

    PubMed

    de Boer, Rob

    2003-01-01

    It is well known that dehydrating conditions for house dust mites can be created by simply raising the temperature, causing loss of body water and eventually death. Thus, it can be expected that conditions for dust mites are less favourable on floors supplied with sub-floor heating. This was examined in a study of 16 houses with sub-floor heating and 21 without. The pattern of changes in air humidity and temperature on the floors was investigated and compared to known data of the tolerance of dust mites. Also the resident mite populations were compared. Floors with sub-floor heating had, on average, fewer mites, but the difference with unheated floors was small. It was remarkable that mite numbers were also lower in upholstered furniture. Another important observation was that some houses with sub-floor heating had high mite numbers, indicating that this type of heating is compatible with a thriving mite population. Temperature and humidity conditions of heated floors may allow mites not only to survive, but also to remain active in winter. A moderate increase in temperature, a moderate decrease in (absolute) air humidity, or a combination of both, will suffice to keep the humidity all winter below the Critical Equilibrium Humidity, the level of air humidity that is critical for mite growth and reproduction, hence for allergen production. However, it is argued that measures to suppress allergen production by house dust mites are likely to be far more effective if taken in summer rather than in winter. PMID:14635817

  11. Oil palm plantation effects on water quality in Kalimantan, Indonesia

    NASA Astrophysics Data System (ADS)

    Carlson, K. M.; Curran, L. M.

    2011-12-01

    Global demand for palm oil has stimulated a 7-fold increase in oil palm (Elaeis guineensis) plantation area in Indonesia since 1990. Expansion will continue as Indonesia plans to double current production by 2020. Oil palm fertilizers, effluent from oil palm mills, and erosion from land clearing and roads threaten river water quality near plantations. These rivers provide essential ecosystem services including water for drinking, cooking, and washing. Robust empirical measurements of plantation expansion impacts on water resources are necessary to discern the effects of agribusiness on local livelihoods and ecosystems. In Ketapang District, West Kalimantan, Indonesian Borneo, we evaluated the effects of land cover change on water quality by assessing water chemistry in streams draining four end-member watersheds ( ~600-1900 ha watershed-1): Logged forest, mixed agro-forest dominated by rubber and upland rice fallows, young oil palm forest (0-5 years), and old oil palm forest (10-15 years). To assess land cover change, we used CLASLite software to derive fractional cover from a time series (1989-2008) of Landsat data. Nearest neighbor classification and post-classification change detection yielded classes including primary forest, logged forest, secondary forest regrowth, smallholder agriculture, and oil palm. Stream water quality (temperature, dissolved oxygen, turbidity, optical chlorphyll, and pH) and quantity (discharge) were quantified with the YSI 6600-V2 sonde. The sonde was deployed in each stream for month-long intervals 2-3 times from 2009-2010. Such extended deployment captures episodic events such as intense storms and allows examination of interdiel dynamics by sampling continuously and at high frequency, every 10 minutes. We find that across the Ketapang District study region (~12,000 km2), oil palm has cleared mostly forests (49%) and agroforests (39%). What are the impacts of such land cover changes on water quality? Compared to forests and agroforests, streams draining oil palm show greater biological activity, as indicated by elevated pH and reduced dissolved oxygen levels. Moreover, turbidity is elevated in young oil palm plantations watersheds compared to forest, agroforest, and old oil palm land covers. We discuss the implications of these findings for communities and ecosystems.

  12. Jerking in predaceous mites (Acari: Phytoseiidae) with emphasis on larvae.

    PubMed

    Blackwood, J S; Croft, B A; Schausberger, P

    2001-01-01

    Jerking, a behavior involving a pronounced and often repeated lunging of the body, was studied in larvae among seven species of phytoseiid mites, Euseius finlandicus, Galendromus occidentalis, Neoseiulus californicus, Neoseulus fallacis, Phytoseiulus macropilis, Phytoseiulus persimilis and Typhlodromus pyri, and in the nymphal stages of N. fallacis. This behavior was observed in larvae of six of the seven species and in all active immature stages of N. fallacis. Jerking was usually triggered by direct contact with a con- or heterospecific mite, although jerking occurred occasionally without direct contact in N. fallacis larvae. The larval jerking tendency (the mean fraction of contacts resulting in jerking) of a species was significantly correlated with a tendency to congregate with conspecifics. Congregated larvae often probed their immediate area and each other with the front legs, repeatedly jerking in response to contact with neighboring larvae. Species with larvae having higher jerking tendencies also jerked more repeatedly per jerking event. Among species, there was no consistent relationship between jerking tendency and larval age. Larvae of N. fallacis had a higher tendency to jerk than protonymphs and deutonymphs, and they had both the highest jerking and congregating tendencies among larvae of all species studied. An individual was more likely to jerk when approached by another mite than when it initiated contact, and when observed in N. fallacis larvae that initiated contact, jerking was sometimes aggressive. Jerking N. fallacis larvae experienced fewer and shorter periods of probing by the mouthparts and fewer attacks from cannibalistic adult females than anesthetized larvae that were unable to jerk. PMID:11697785

  13. Cold hardiness of the broad mite Polyphagotarsonemus latus (Acari: Tarsonemidae).

    PubMed

    Luypaert, Gil; Witters, Johan; Berkvens, Nick; Van Huylenbroeck, Johan; De Riek, Jan; De Clercq, Patrick

    2015-05-01

    The cold hardiness of the broad mite, Polyphagotarsonemus latus, a key pest in Rhododendron simsii hybrid production in northwestern Europe, was investigated in the laboratory. Survival of eggs, larvae and female adults and reproduction capacity of female P. latus were evaluated following cold exposure at 7 °C. Adult females were also exposed to temperatures of 2 and -3 °C. Further, the supercooling point and lower lethal times of adult females were determined. No eggs survived exposure to 7 °C for 17 or more days. Larval survival upon the cold treatment decreased from 53 to 13 % when exposed to 7 °C for 14 and 49 days, respectively. Two-day-old adult females exposed to 7 °C for up to 42 days did not suffer significant mortality, but when returned to 25 °C their oviposition rates were lower than those of mites maintained at 25 °C. Less than 40 % of females exposed for 13 days to 2 °C survived; only 20 % of these females was able to reproduce upon recovery. Subzero temperatures dramatically decreased survival and reproduction capacity of adult females. The supercooling point of female adults was -16.5 °C. Median lethal times averaged 61.2 h and 9.3 days at -3 and 2 °C, respectively. In conclusion, a long term exposure (up to 6 weeks) of R. simsii plants infested with P. latus to a temperature of 7 °C, which is required for breaking dormancy of the flowers, is not expected to have detrimental effects on the survival and reproductive performance of the female mites. PMID:25758635

  14. Continuous transmethylation of palm oil in an organic solvent

    Microsoft Academic Search

    Kanit Krisnangkura; Ratchadaporn Simamaharnnop

    1992-01-01

    Palm oil was transmethylated continuously at 70C in an organic solvent with sodium methoxide as a catalyst. The optimum ratio\\u000a of toluene to palm oil is 1?1 (v\\/v). When the methanol-to-oil molar ratio was 13?1, transmethylation was 96% complete within\\u000a 60 seconds. At higher molar ratio (17?1), transmethylation was 99% complete in 15 seconds. For lower molar ratios of methanol-to-oil

  15. Steam (physical) refining deodorizer for malaysian palm oil

    Microsoft Academic Search

    Arnold M. Gavin; K. T. Toeh; G. Carlin

    1977-01-01

    The production of Malaysian palm oil is expected to increase 20% per year for the next 5 yr. Already planted are more than\\u000a a million acres which will start to produce in the next few years. Recent plantings of new strains will produce 2400 to 3000\\u000a lb of palm oil per acre. Palmex Industries, Penang, Malaysia started in operation in

  16. Temperature Governs On-Host Distribution of the Northern Fowl Mite, Ornithonyssus sylviarum (Acari: Macronyssidae).

    PubMed

    De La Riva, Deborah G; Soto, Diane; Mullens, Bradley A

    2015-02-01

    The northern fowl mite, Ornithonyssus sylviarum (Canestri & Fanzago), is an ectoparasite of more than 70 species of North American wild birds, but it has a particularly significant impact on chickens, where it is a permanent resident of vent feathers. Improved control practices depend on a better understanding of host-mite relationships. ISA Brown hens were inoculated experimentally with northern fowl mite adults, and northern fowl mite populations developed naturally. Using a fast-response microprobe, temperatures of individual vent feathers (n = 15) were recorded at 5-mm increments along the length of the feather shaft. Immediately after temperatures were recorded, the individual feathers were quickly clipped at the skin surface and then flash-frozen between 2 small blocks of dry ice, freezing all northern fowl mite stages in situ. The feathers then were cut into 5-mm sections for careful mite enumeration by life stage. There were no overall differences among life stages in the distributions on the feather. Mite positions on feathers (distance from skin) varied distinctly with feather zone temperatures, as well as with ambient and average temperatures over the prior 24 hr. Ambient temperature at time of sampling affected the positions of the 2 mobile categories, adults and larvae/nymphs, but showed no statistical relationship with egg distribution. In contrast, ambient 24-hr temperature influenced the positions of all life stages. On-host feather temperatures reflected ambient temperatures. Feathers collected on hot days (ambient temperatures of 23-33 C) provided a narrow and quite warm range of temperature conditions for mites (often >30-36 C). Temperatures on cool days (ambient temperatures of <23 C) provided much wider on-host temperature ranges for mites to occupy (13-35 C). Mites were farther from the skin on warmer days. When mites had a broad range of temperatures, the feather temperature zone occupied by all life stages averaged 28-29 C. Mites move to occupy favorable temperature conditions on-host. When further out on feathers in warm weather, and under thermal stress, northern fowl mites either move off host or are dislodged. They then become a human pest, are noticed by farmers, and are more likely to disperse. PMID:25275303

  17. Electrocoagulation of palm oil mill effluent.

    PubMed

    Agustin, Melissa B; Sengpracha, Waya P; Phutdhawong, Weerachai

    2008-09-01

    Electrocoagulation (EC) is an electrochemical technique which has been employed in the treatment of various kinds of wastewater. In this work the potential use of EC for the treatment of palm oil mill effluent (POME) was investigated. In a laboratory scale, POME from a factory site in Chumporn Province (Thailand) was subjected to EC using aluminum as electrodes and sodium chloride as supporting electrolyte. Results show that EC can reduce the turbidity, acidity, COD, and BOD of the POME as well as some of its heavy metal contents. Phenolic compounds are also removed from the effluent. Recovery techniques were employed in the coagulated fraction and the recovered compounds was analysed for antioxidant activity by DPPH method. The isolate was found to have a moderate antioxidant activity. From this investigation, it can be concluded that EC is an efficient method for the treatment of POME. PMID:19139537

  18. Cryopreservation of peach palm zygotic embryos.

    PubMed

    Steinmacher, Douglas A; Saldanha, Cleber W; Clement, Charles R; Guerra, Miguel P

    2007-01-01

    Cryopreservation is a safe and cost-effective option for long-term germplasm conservation of non-orthodox seed species, such as peach palm (Bactris gasipaes). The objective of the present study was to establish a cryopreservation protocol for peach palm zygotic embryos based on the encapsulation-dehydration technique. After excision, zygotic embryos were encapsulated with 3 percent sodium alginate plus 2 M glycerol and 0.4 M sucrose, and pre-treated or not with 1 M sucrose during 24 h, followed by air-drying. Fresh weight water contents of beads decreased from 83 percent and 87 percent to 18 percent and 20 percent for pre-treated or non-pretreated beads, respectively, after 4 h of dehydration. Sucrose pre-treatment at 1 M caused lower zygotic embryo germination and plantlet height in contrast to non-treated beads. All the variables were statistically influenced by dehydration time. Optimal conditions for recovery of cryopreserved zygotic embryos include encapsulation and dehydration for 4 h in a forced air cabinet to 20 percent water content, followed by rapid freezing in liquid nitrogen (-196 degree C) and rapid thawing at 45 degree C. In these conditions 29 percent of the zygotic embryos germinated in vitro. However, plantlets obtained from dehydrated zygotic embryos had stunted haustoria and lower heights. Histological analysis showed that haustorium cells were large, vacuolated, with few protein bodies. In contrast, small cells with high nucleus:cytoplasm ratio formed the shoot apical meristem of the embryos, which were the cell types with favorable characteristics for survival after exposure to liquid nitrogen. Plantlets were successfully acclimatized and showed 41+/-9 percent and 88+/-4 percent survival levels after 12 weeks of acclimatization from cryopreserved and non-cryopreserved treatments, respectively. PMID:17369958

  19. Conjunctivitis induced by a red bodied mite, Neotrombicula autumnalis.

    PubMed

    Parcell, Benjamin J; Sharpe, Graeme; Jones, Brian; Alexander, Claire L

    2013-01-01

    This is a description of an unusual case of conjunctivitis caused by a trombiculid red mite, Neotrombicula autumnalis. The patient's condition improved only after its removal and with application of carbomer gel eye drops. There have been reports of increasing numbers of severe cases of trombiculosis over the last 15 years particularly in Germany and a number of cases have also been reported in the United Kingdom. Cases where trombiculid larvae feed on any region of the head or face of humans are unknown. In addition it is most likely the patient acquired the infection from her pet cat and this is the first description of acquisition from this animal. PMID:23823162

  20. The palm wine trade: occupational and health hazards.

    PubMed

    Mbuagbaw, L; Noorduyn, S G

    2012-10-01

    The palm wine trade is an important economic activity for many tropical rural areas worldwide. In West Africa, palm wine holds high sociocultural and traditional values. Wine tappers often climb very tall trees with rudimentary equipment to harvest palm sap and risk severe injuries in the event of a fall. Furthermore, the wine quickly ferments beyond the desired taste and alcohol content, reducing the market power of these tappers. Therefore, to maximize benefits or to enhance shelf life, a variety of components are added to the palm tree sap, introducing the possibility of deadly contaminants. This paper highlights the public health implications of uncontrolled palm wine production and the relative neglect of the wine tapper. We draw from the limited published literature and use Cameroon as a case study. The palm wine trade can be more productive and safe if tappers work in cooperatives to improve their market power. Public health authorities need to monitor the quality of this cheap and common source of alcohol and enact regulations to protect wine tappers from the current level of occupational hazards. There are varying levels of progress to control quality and ensure safety in different parts of the world. Legislation and collaboration with traditional structures may offer a framework for change. PMID:23022866

  1. Metabolism of Cytokinins by Tissue Culture Lines of Oil Palm ( Elaeis guineensis Jacq.) Producing Normal and Abnormal Flowering Palms

    Microsoft Academic Search

    L. H. Jones

    1998-01-01

    .   The metabolism of cytokinins in tissue cultures of two oil palm clones previously known to regenerate palms ultimately manifesting\\u000a normal and abnormal flowering was studied using radiolabeled benzyladenine and isopentenyladenosine, with particular regard\\u000a to the kinetics of formation of the cytokinin 9-glucoside. Labeled products were separated by high performance liquid chromatography\\u000a and identified by comparison of retention times with

  2. Catalytic processes towards the production of biofuels in a palm oil and oil palm biomass-based biorefinery.

    PubMed

    Chew, Thiam Leng; Bhatia, Subhash

    2008-11-01

    In Malaysia, there has been interest in the utilization of palm oil and oil palm biomass for the production of environmental friendly biofuels. A biorefinery based on palm oil and oil palm biomass for the production of biofuels has been proposed. The catalytic technology plays major role in the different processing stages in a biorefinery for the production of liquid as well as gaseous biofuels. There are number of challenges to find suitable catalytic technology to be used in a typical biorefinery. These challenges include (1) economic barriers, (2) catalysts that facilitate highly selective conversion of substrate to desired products and (3) the issues related to design, operation and control of catalytic reactor. Therefore, the catalytic technology is one of the critical factors that control the successful operation of biorefinery. There are number of catalytic processes in a biorefinery which convert the renewable feedstocks into the desired biofuels. These include biodiesel production from palm oil, catalytic cracking of palm oil for the production of biofuels, the production of hydrogen as well as syngas from biomass gasification, Fischer-Tropsch synthesis (FTS) for the conversion of syngas into liquid fuels and upgrading of liquid/gas fuels obtained from liquefaction/pyrolysis of biomass. The selection of catalysts for these processes is essential in determining the product distribution (olefins, paraffins and oxygenated products). The integration of catalytic technology with compatible separation processes is a key challenge for biorefinery operation from the economic point of view. This paper focuses on different types of catalysts and their role in the catalytic processes for the production of biofuels in a typical palm oil and oil palm biomass-based biorefinery. PMID:18434141

  3. Whiteflies interfere with indirect plant defense against spider mites in Lima bean.

    PubMed

    Zhang, Peng-Jun; Zheng, Si-Jun; van Loon, Joop J A; Boland, Wilhelm; David, Anja; Mumm, Roland; Dicke, Marcel

    2009-12-15

    Plants under herbivore attack are able to initiate indirect defense by synthesizing and releasing complex blends of volatiles that attract natural enemies of the herbivore. However, little is known about how plants respond to infestation by multiple herbivores, particularly if these belong to different feeding guilds. Here, we report the interference by a phloem-feeding insect, the whitefly Bemisia tabaci, with indirect plant defenses induced by spider mites (Tetranychus urticae) in Lima bean (Phaseolus lunatus) plants. Additional whitefly infestation of spider-mite infested plants resulted in a reduced attraction of predatory mites (Phytoseiulus persimilis) compared to attraction to plants infested by spider mites only. This interference is shown to result from the reduction in (E)-beta-ocimene emission from plants infested by both spider mites and whiteflies. When using exogenous salicylic acid (SA) application to mimic B. tabaci infestation, we observed similar results in behavioral and chemical analyses. Phytohormone and gene-expression analyses revealed that B. tabaci infestation, as well as SA application, inhibited spider mite-induced jasmonic acid (JA) production and reduced the expression of two JA-regulated genes, one of which encodes for the P. lunatus enzyme beta-ocimene synthase that catalyzes the synthesis of (E)-beta-ocimene. Remarkably, B. tabaci infestation concurrently inhibited SA production induced by spider mites. We therefore conclude that in dual-infested Lima bean plants the suppression of the JA signaling pathway by whitefly feeding is not due to enhanced SA levels. PMID:19965373

  4. Odor volatiles associated with mite-infested bin-stored wheat.

    PubMed

    Tuma, D; Sinha, R N; Muir, W E; Abramson, D

    1990-03-01

    Tridecane, not previously reported in infested bin-stored grain, was associated with three mite species,Acarus siro (L.),Aeroglyphus robustus Banks, andLepidoglyphus destructor (Schrank), which were introduced into 15.2% moisture content wheat stored in two unheated experimental bins in Manitoba during 1986-1987. The mites and volatiles were sampled at weekly to bimonthly intervals throughout the year. The mites produced tridecane all year, although they overwintered at low numbers. Ventilation of one bin at an airflow rate of 1 liter/sec/m(3) did not appear to affect mite survival and volatile production. Citral, an alarm pheromone for mites, was detected in mite-infested bin-stored grain. In laboratory studies all three mite species produced tridecane in wheat incubated at 20 °C and 70% relative humidity for two weeks.Acarus siro andAeroglyphus robustus reared at 25 °C and 90% relative humidity for four weeks on wheat and fungus-inoculated wheat also produced tridecane. Production of tridecane byA. robustus andL. destructor is being reported for the first time. PMID:24263587

  5. Emerging risk of infestation and contamination of dried fruits by mites in the Czech Republic.

    PubMed

    Hubert, Jan; Erban, Tomas; Nesvorna, Marta; Stejskal, Vaclav

    2011-09-01

    The introduction of live insects into human food is rare in developed countries. However, we report, for the first time, an emerging risk that exists from dried fruit in Central Europe. Recently, massive and frequent infestation of dried fruit imported from the Mediterranean region by the mite, Carpoglpyhus lactis L. (Acarina: Carpoglyphidae), has been found. In 180 samples taken from supermarkets, 13% were contaminated; the contamination levels ranged from 0 to 660 mites per g of dried fruit. The contamination was found in dried apricots, figs, plums and raisins. To estimate the risks and food preferences of C. lactis, its growth rate was examined under laboratory conditions. Starting with a hypothetical population of 10 mites per g of dried fruit, the risk level of 1000 mites per g of dried fruit is reached at 42 days for dried figs, 49 days for dried pineapple and 63 days for dried apricots, dates and plums at 25 °C and 85% relative humidity. We found that mites are able to enter every dried fruit packing material tested, including polypropylene and aluminum foils. This indicates that mites can move from package to package in supermarkets. Mites are known as allergen producers and vectors of mycotoxin-producing fungi. These findings indicate that an increased risk of C. lactis contamination exists in dried fruit. PMID:21793685

  6. Infestation of research zebra finch colony with 2 novel mite species.

    PubMed

    Siddalls, Monica; Currier, Timothy A; Pang, Jassia; Lertpiriyapong, Kvin; Patterson, Mary M

    2015-01-01

    A zebra finch (Taeniopygia guttata) housed in a neuroscience laboratory was observed to have numerous feather mites. Subsequently, similar mites were found on other birds in the animal facility and research space. The most abundant mite was a novel, undescribed species in the genus Neocheyletiella. Whereas known Neocheyletiella mites have previously been characterized as skin parasites of various birds worldwide, the species on the zebra finches is unique because it lives and builds nests in the feathers. Infrequent specimens of a 'true' feather mite, a new species of Megninialges, were present also. Although multiple treatments using a pyrethrin spray were effective in eradicating the mites, topical ivermectin later was found to be more efficacious, better tolerated by the birds, and less labor intensive. This case highlights the general dearth of information regarding ectoparasites in zebra finches, even though these are the most frequently used songbirds in biomedical research. The mite epizootic also underscores the diverse pathogens possible in zebra finches that arrive from outside sources and why ongoing health monitoring of finch colonies is warranted. PMID:25730757

  7. Mites are the most common vectors of the fungus Gondwanamyces proteae in Protea infructescences.

    PubMed

    Roets, Francois; Wingfield, Michael J; Wingfield, Brenda D; Dreyer, Leanne L

    2011-01-01

    Entomochoric spore dispersal is well-documented for most ophiostomatoid fungal genera, most of which are associated with bark or ambrosia beetles. Gondwanamyces spp. are unusual members of this group that were first discovered in the flower heads of the primitive angiosperm genus Protea, that is mostly restricted to the Cape Floristic region of Africa. In this study, we present the discovery of the vectors of Gondwanamyces proteae in Protea repens infructescences, which were identified using PCR, direct isolation, and light microscopy. Gondwanamyces proteae DNA and ascospores were identified on diverse lineages of arthropods including beetles (Euderes lineicolis and Genuchus hottentottus), bugs (Oxycarenus maculates), a psocopteran species and five mite (Acari) species. Based on isolation frequency, however, a mite species in the genus Trichouropoda appears to be the most common vector of G. proteae. Gondwanamyces spores were frequently observed within pit mycangia at the base of the legs of these mites. Manipulative experiments demonstrated the ability of mites to carry viable G. proteae spores whilst in transit on the beetle G. hottentottus and that these mites are able to transfer G. proteae spores to uncolonised substrates in vitro. Interestingly, this same mite species has also been implicated as vector of Ophiostoma spores on P. repens and belongs to the same genus of mites that vector Ophiostoma spp. associated with pine-infesting bark beetles in the Northern Hemisphere. PMID:21530916

  8. Inter-population variation for Wolbachia induced reproductive incompatibility in the haplodiploid mite Tetranychus urticae.

    PubMed

    Suh, Eunho; Sim, Cheolho; Park, Jung-Joon; Cho, Kijong

    2015-01-01

    Recent studies have revealed diverse patterns of cytoplasmic incompatibility (CI) induced by Wolbachia in the two spotted spider mite (Tetranychus urticae Koch). The mechanism of CI consists of two steps: modification (mod) of sperm of infected males and the rescue (resc) of these chromosomes by Wolbachia in the egg, which results in female embryonic mortality (FM), male development (MD) or no CI. Our study reports that Wolbachia infections were highly prevalent infecting all T. urticae populations from various crops in 14 commercial greenhouses in Korea, with two Wolbachia strains expressing distinctive phenotypic effects on hosts. Analyses for wsp gene sequences obtained from collected mite populations revealed all sequences were categorized into two groups (group W1 and W2) discriminated by three diagnostic nucleotides while all Wolbachia strains belonged to the subgroup Ori in Wolbachia supergroup B. Host plants of each mite population were also generally correlated this grouping. Various mating experiments with two mite populations from each group showed that CI patterns and host plants of the mite populations were completely matched with the grouping; no CI (mod(-)resc(+)) for group W1 and mixed pattern of FM and MD (mod(+)resc(+)) for group W2. No distinct changes in fecundity or sex ratio due to Wolbachia infections were observed in four mite populations regardless of Wolbachia grouping. Our study suggests a potential correlation between phenotypic effect of Wolbachia infection and its genetic diversity associated with host plants in Korean mite populations. PMID:25091123

  9. Spider mites adaptively learn recognizing mycorrhiza-induced changes in host plant volatiles.

    PubMed

    Patińo-Ruiz, J David; Schausberger, Peter

    2014-12-01

    Symbiotic root micro-organisms such as arbuscular mycorrhizal fungi commonly change morphological, physiological and biochemical traits of their host plants and may thus influence the interaction of aboveground plant parts with herbivores and their natural enemies. While quite a few studies tested the effects of mycorrhiza on life history traits, such as growth, development and reproduction, of aboveground herbivores, information on possible effects of mycorrhiza on host plant choice of herbivores via constitutive and/or induced plant volatiles is lacking. Here we assessed whether symbiosis of the mycorrhizal fungus Glomus mosseae with common bean plants Phaseolus vulgaris influences the response of the two-spotted spider mite Tetranychus urticae to volatiles of plants that were clean or infested with spider mites. Mycorrhiza-naďve and -experienced spider mites, reared on mycorrhizal or non-mycorrhizal bean plants for several days before the experiments, were subjected to Y-tube olfactometer choice tests. Experienced but not naďve spider mites distinguished between constitutive volatiles of clean non-mycorrhizal and mycorrhizal plants, preferring the latter. Neither naďve nor experienced spider mites distinguished between spider mite-induced volatiles of mycorrhizal and non-mycorrhizal plants. Learning the odor of clean mycorrhizal plants, resulting in a subsequent preference for these odors, is adaptive because mycorrhizal plants are more favorable host plants for fitness of the spider mites than are non-mycorrhizal plants. PMID:25097072

  10. Ricoseius loxocheles, a phytoseiid mite that feeds on coffee leaf rust.

    PubMed

    Oliveira, Cleber M; Ferreira, Joăo A M; Oliveira, Rafael M; Santos, Francisco O; Pallini, Angelo

    2014-10-01

    One of the most important diseases of coffee plants is the coffee leaf rust fungus Hemileia vastatrix Berkeley and Broome (Uredinales). It can cause 30 % yield loss in some varieties of Coffea arabica (L.). Besides fungus, the coffee plants are attacked by phytophagous mites. The most common species is the coffee red mite, Oligonychus ilicis McGregor (Acari: Tetranychidae). Predatory mites of the Phytoseiidae family are well-known for their potential to control herbivorous mites and insects, but they can also develop and reproduce on various other food sources, such as plant pathogenic fungi. In a field survey, we found Ricoseius loxocheles (De Leon) (Acari: Phytoseiidae) on the necrotic areas caused by the coffee leaf rust fungus during the reproductive phase of the pathogen. We therefore assessed the development, survivorship and reproduction of R. loxocheles feeding on coffee leaf rust fungus and measured predation and oviposition of this phytoseiid having coffee red mite as prey under laboratory conditions. The mite fed, survived, developed and reproduced successfully on this pathogen but it was not able to prey on O. ilicis. Survival and oviposition with only prey were the same as without food. This phytoseiid mite does not really use O. ilicis as food. It is suggested that R. loxocheles is one phytoseiid that uses fungi as a main food source. PMID:24744058

  11. The proteinases of Psoroptes ovis, the sheep scab mite--their diversity and substrate specificity.

    PubMed

    Kenyon, Fiona; Knox, David

    2002-05-10

    The sheep scab mite, Psoroptes ovis, causes severe dermatitis in infected sheep with severe welfare and production implications. The dermatitis has the characteristics of an immediate hypersensitivity type reaction which, by analogy to other mite species, including the house dust mites (Dermatophagoides spp.), is likely to be invoked by a variety of allergens including mite-derived proteinases. Here, the proteinases in P. ovis extracts were characterised using substrate gel analysis, inhibitor sensitivity and their ability to degrade a variety of potential natural protein substrates. These analyses showed that mites contain several proteinases which could be differentiated on the basis of molecular size and inhibitor sensitivity with cysteine, metalloproteinases and aspartyl proteinases predominating. These proteinases degraded collagen and fibronectin, possibly indicative of a role in lesion initiation, they degraded several blood proteins, a property which may aid mite feeding and they degraded immunoglobulin G, possibly aiding immuno-evasion. Because proteinases, particularly the cysteine class, are demonstrably allergenic in other mite infestations, these proteinases clearly merit further immunological and biochemical definition. PMID:11983306

  12. Three Halloween genes from the Varroa mite, Varroa destructor (Anderson & Trueman) and their expression during reproduction.

    PubMed

    Cabrera, A R; Shirk, P D; Evans, J D; Hung, K; Sims, J; Alborn, H; Teal, P E A

    2015-06-01

    The ecdysteroid biosynthetic pathway involves sequential enzymatic hydroxylations by a group of enzymes collectively known as Halloween gene proteins. Complete sequences for three Halloween genes, spook (Vdspo), disembodied (Vddib) and shade (Vdshd), were identified in varroa mites and sequenced. Phylogenetic analyses of predicted amino acid sequences for Halloween orthologues showed that the acarine orthologues were distantly associated with insect and crustacean clades indicating that acarine genes had more ancestral characters. The lack of orthologues or pseudogenes for remaining genes suggests these pathway elements had not evolved in ancestral arthropods. Vdspo transcript levels were highest in gut tissues, while Vddib transcript levels were highest in ovary-lyrate organs. In contrast, Vdshd transcript levels were lower overall but present in both gut and ovary-lyrate organs. All three transcripts were present in eggs removed from gravid female mites. A brood cell invasion assay was developed for acquiring synchronously staged mites. Mites within 4?h of entering a brood cell had transcript levels of all three that were not significantly different from mites on adult bees. These analyses suggest that varroa mites may be capable of modifying 7-dehydro-cholesterol precursor and hydroxylations of other steroid precursors, but whether the mites directly produce ecdysteroid precursors and products remains undetermined. PMID:25488435

  13. Stored product mites (Acari: Astigmata) infesting food in various types of packaging.

    PubMed

    Hubert, Jan; Nesvorna, Marta; Volek, Vlado

    2015-02-01

    From 2008 to 2014, stored product mites have been reported from prepackaged dried food on the market in the Czech Republic. The infestation was by Carpoglyphus lactis (L.) in dried fruits and Tyrophagus putrescentiae (Schrank) in dog feed. The infestation is presumably caused by poor protection of the packages. We compared various packaging methods for their resistance to mites using dried apricots and dog feed in laboratory experiments. The trial packages included nine different plastic films, monofilm, duplex and triplex, and one type of plastic cup (ten replicates per packaging type). All packaging materials are available on the Czech market for dried food products. The samples of dried food were professionally packed in a factory and packaged dried apricots were exposed to C. lactis and dog food to T. putrescentiae. After 3 months of exposure, the infestation and mite density of the prepackaged food was assessed. Mites were found to infest six types of packages. Of the packaging types with mites, 1-5 samples were infested and the maximum abundance was 1,900 mites g(-1) of dried food. Mites entered the prepackaged food by faulty sealing. Inadequate sealing is suggested to be the major cause of the emerged infestation of dried food. PMID:25420687

  14. Eradication of elephant ear mites (Loxoanoetus bassoni) in two African elephants (Loxodonta africana).

    PubMed

    Wyatt, Jeff; DiVincenti, Louis

    2012-03-01

    Elephant ear mites, not previously described in North America, were eradicated in two African elephants (Loxodonta africana) after six otic instillations of ivermectin at 2-wk intervals. The microscopic examination of a clear, mucoid discharge collected from the external ear canals of two wild-born African elephants housed in a New York State zoo for 25 yr revealed live mites (Loxoaneotus bassoni). The cytologic examination demonstrated no evidence of inflammation or infection. Both elephants were asymptomatic with normal hemograms and serum chemistry panels. A diagnosis of otoacariasis was made. Each elephant was treated six times with 5 ml of 1% ivermectin syrup instilled in each ear canal once every 2 wk. Microscopic examinations of clear mucus collected from each elephant's ear canals 9 days after the first instillation of ivermectin were negative for any life stages of ear mites. Microscopic examinations of mucus collected from both elephants' ear canals at 6, 11, and 16 wk, as well as annually post-treatment for 7 yr, confirmed eradication of the ear mites. The L. bassoni ear mite was first identified in the external ear canals of wild, asymptomatic, lesion-free, African elephants culled in Kruger National Park in South Africa. However, a new species in the same genus of mites (Loxoanoetus lenae) was identified at the necropsy of an 86-yr-old Asian elephant (Elephas maximus) living in a circus in Australia. The autopsy revealed a marked, ballooning distension of bone around the left external acoustic meatus, suggestive of mite-induced otitis externa, as seen in cattle infested with ear mites (Raillieta auris). Elephant health care providers should identify the prevalence of, and consider treatment of, elephants in their care infested with ear mites, given the possible risk for adverse health effects. PMID:22448521

  15. New mite invasions in citrus in the early years of the 21st century.

    PubMed

    Ferragut, Francisco; Navia, Denise; Ochoa, Ronald

    2013-02-01

    Several mite species commonly attack cultivated citrus around the world. Up to 104 phytophagous species have been reported causing damage to leaves, buds and fruits, but only a dozen can be considered major pests requiring control measures. In recent years, several species have expanded their geographical range primarily due to the great increase in trade and travel worldwide, representing a threat to agriculture in many countries. Three spider mite species (Acari: Tetranychidae) have recently invaded the citrus-growing areas in the Mediterranean region and Latin America. The Oriental red mite, Eutetranychus orientalis (Klein), presumably from the Near East, was detected in southern Spain in 2001. The Texas citrus mite, Eutetranychus banksi (McGregor), is widely distributed in North, Central and South America. It was first reported in Europe in 1999 on citrus in Portugal; afterwards the mite invaded the citrus orchards in southern Spain. In Latin America, the Hindustan citrus mite, Schizotetranychus hindustanicus (Hirst), previously known only from citrus and other host plants in India, was reported causing significant damage to citrus leaves and fruits in Zulia, northwest Venezuela, in the late 1990s. Later, this mite species spread to the southeast being detected on lemon trees in the state of Roraima in northern Brazil in 2008. Whereas damage levels, population dynamics and control measures are relatively well know in the case of Oriental red mite and Texas citrus mite, our knowledge of S. hindustanicus is noticeably scant. In the present paper, information on pest status, seasonal trends and natural enemies in invaded areas is provided for these species, together with morphological data useful for identification. Because invasive species may evolve during the invasion process, comparison of behavior, damage and management options between native and invaded areas for these species will be useful for understanding the invader's success and their ability to colonize new regions. PMID:23135361

  16. Lipopolysaccharide binding of the mite allergen Der f 2.

    PubMed

    Ichikawa, Saori; Takai, Toshiro; Yashiki, Tomoe; Takahashi, Seizo; Okumura, Ko; Ogawa, Hideoki; Kohda, Daisuke; Hatanaka, Hideki

    2009-09-01

    Lipid-binding properties and/or involvement with host defense are often found in allergen proteins, implying that these intrinsic biological functions likely contribute to the allergenicity of allergens. The group 2 major mite allergens, Der f 2 and Der p 2, show structural homology with MD-2, the lipopolysaccharide (LPS)-binding component of the Toll-like receptor (TLR) 4 signalling complex. Elucidation of the ligand-binding properties of group 2 mite allergens and identification of interaction sites by structural studies are important to explore the relationship between allergenicity and biological function. Here, we report a ligand-fishing approach in which His-tagged Der f 2 was incubated with sonicated stable isotope-labelled Escherichia coli as a potential ligand source, followed by isolation of Der f 2-bound material by a HisTrap column and NMR analysis. We found that Der f 2 binds to LPS with a nanomolar affinity and, using fluorescence and gel filtration assays that LPS binds to Der f 2 in a molar ratio of 1 : 1. We mapped the LPS-binding interface of Der f 2 by NMR perturbation studies, which suggested that LPS binds Der f 2 between the two large beta-sheets, similar to its binding to MD-2, the LPS-binding component of the innate immunity receptor TLR4. PMID:19678854

  17. Incidence of mites associated with stored seeds and food products in upper Egypt.

    PubMed

    Zaher, M A; Mohamed, M I; Abdel-Halim, S M

    1986-04-01

    A survey on mites associated with stored seeds, flour and foodstuffs in Fayoum Governorate, Upper Egypt, proved the occurrence of about 24 species. Of these, 15 species in 8 families belong to Prostigmata, 6 species in 3 families belong to Astigmata and 3 species in 2 families belong to Mesostigmata. Members of the families Cheyletidae and Acaridae were the most common mites, found in many samples. Those of Caligonellidae, Ascidae and Raphignathidae were fairly common, but occurred in fewer types of samples. No mites were found in samples of lupine and camomile. PMID:3451860

  18. Design and Development of the MITEE-B Bi-Modal Nuclear Propulsion Engine

    NASA Astrophysics Data System (ADS)

    Paniagua, John C.; Powell, James R.; Maise, George

    2003-01-01

    Previous studies of compact, ultra-lightweight high performance nuclear thermal propulsion engines have concentrated on systems that only deliver high thrust. However, many potential missions also require substantial amounts of electric power. Studies of a new, very compact and lightweight bi-modal nuclear engine that provides both high propulsive thrust and high electric power for planetary science missions are described. The design is a modification of the MITEE nuclear thermal engine concept that provided only high propulsive thrust. In the new design, MITEE-B, separate closed cooling circuits are incorporated into the reactor, which transfers useful amounts of thermal energy to a small power conversion system that generates continuous electric power over the full life of the mission, even when the engine is not delivering propulsive thrust. Two versions of the MITEE-B design are described and analyzed. Version 1 generates 1 kW(e) of continuous power for control of the spacecraft, sensors, data transmission, etc. This power level eliminates the need for RTG's on missions to the outer planets, and allowing considerably greater operational capability for the spacecraft. This, plus its high thrust and high specific impulse propulsive capabilities, makes MITEE-B very attractive for such missions. In Version 2, of MITEE-B, a total of 20 kW(e) is generated, enabling the use of electric propulsion. The combination of high open cycle propulsion thrust (20,000 Newtons) with a specific impulse of ~1000 seconds for short impulse burns, and long term (months to years), electric propulsion greatly increases MITEE's ?V capability. Version 2 of MITEE-B also enables the production and replenishment of H2 propellant using in-situ resources, such as electrolysis of water from the ice sheet on Europa and other Jovian moons. This capability would greatly increase the ?V available for certain planetary science missions. The modifications to the MITEE multiple pressure tube/fuel element assembly to achieve bi-modal capability are modest. Small diameter coolant tubes are bonded to the surface of the MITEE cold frits that enclose the fuel elements. When the MITEE-B is not operating with H2 propellant to generate high thrust, the reactor continues to operate at low thermal, which is transferred to the closed coolant circuit. Three electric power generations are examined for MITEE-B: closed Brayton, Stirling, and a conventional steam cycle with a mini-turbine. The Stirling and steam cycles have the lowest specific masses in kg/kW(e). Both appear practical for MITEE-B.

  19. Infestation of two brown-headed cowbirds (Molothrus ater) with the hunchback mite (Harpirhynchus quasimodo).

    PubMed

    Magenwirth, Jessica; Nemeth, Nicole M; Yabsley, Michael J; Munk, Brandon A; Keel, M Kevin; Brown, Justin D

    2013-12-01

    A recently described North American mite, Harpirhynchus quasimodo (Acariformes: Harpirhynchidae), was identified in a wild brown-headed cowbird (Molothrus ater) from Tennessee and another from Arkansas, U. S. A., during 2010 and 2011, respectively. Consistent with a single previous report of H. quasimodo infestation, both cowbirds had multiple skin masses composed of epidermal cysts filled with harpirhynchid mites, keratin, and cellular debris. Although very little is currently known about this avian mite, these three reports suggest that H. quasimodo infestation is a rare source of overt disease in free-ranging brown-headed cowbirds from the southeastern United States; however, further research and surveillance efforts are needed. PMID:24597129

  20. Skin and serum reactivity to some storage mites in children sensitive to Dermatophagoides pteronyssinus.

    PubMed

    Boner, A L; Richelli, C; Vallone, G; Verga, A; Parotelli, R; Andri, L; Piacentini, G L

    1989-07-01

    The incidence of skin test and RAST positivity for Dermatophagoides farinae and storage mites (Glycyphagus privatus, Lepidoglyphus destructor, Tyrophagus putrescentiae, Acarus siro, and Gohieria fusca) have been evaluated in children with bronchial asthma and positive prick test to Dermatophagoides pteronyssinus. The storage mite with highest incidence of skin and RAST positivity was Gohieria fusca, which caused a positive response in more than 50% of the children evaluated. This antigen appears to possess allergenic determinants not present in Dermatophagoides pteronyssinus. The sensitivity to this antigen might be considered in house dust mite-allergic children who do not improve after specific immunotherapy with Dermatophagoides pteronyssinus extracts. PMID:2742217

  1. 78 FR 22193 - Special Local Regulations; West Palm Beach Triathlon Championship, Intracoastal Waterway; West...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-15

    ...navigable waters of the United States during the West Palm Beach Triathlon Championship. On June 1, 2013, Game One Sports Marketing Group is hosting the West Palm Beach Triathlon Championship. The race will be held on the waters of the...

  2. 78 FR 2916 - Special Local Regulation; West Palm Beach Triathlon Championship, Intracoastal Waterway, West...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-15

    ...States during the West Palm Beach Triathlon Championship. C. Discussion of Proposed Rule On June 1, 2013, Game One Sports Marketing Group is hosting the West Palm Beach Triathlon Championship. The races will be held on the waters of the...

  3. SSR mining in oil palm EST database: application in oil palm germplasm diversity studies.

    PubMed

    Ting, Ngoot-Chin; Zaki, Noorhariza Mohd; Rosli, Rozana; Low, Eng-Ti Leslie; Ithnin, Maizura; Cheah, Suan-Choo; Tan, Soon-Guan; Singh, Rajinder

    2010-08-01

    This study reports on the detection of additional expressed sequence tags (EST) derived simple sequence repeat (SSR) markers for the oil palm. A large collection of 19243 Elaeis guineensis ESTs were assembled to give 10258 unique sequences, of which 629 ESTs were found to contain 722 SSRs with a variety of motifs. Dinucleotide repeats formed the largest group (45.6%) consisting of 66.9% AG/CT, 21.9% AT/AT, 10.9% AC/GT and 0.3% CG/CG motifs. This was followed by trinucleotide repeats, which is the second most abundant repeat types (34.5%) consisting of AAG/CTT (23.3%), AGG/CCT (13.7%), CCG/CGG (11.2%), AAT/ATT (10.8%), AGC/GCT (10.0%), ACT/AGT (8.8%), ACG/CGT (7.6%), ACC/GGT (7.2%), AAC/GTT (3.6%) and AGT/ACT (3.6%) motifs. Primer pairs were designed for 405 unique EST-SSRs and 15 of these were used to genotype 105 E. guineensis and 30 E. oleifera accessions. Fourteen SSRs were polymorphic in at least one germplasm revealing a total of 101 alleles. The high percentage (78.0%) of alleles found to be specific for either E. guineensis or E. oleifera has increased the power for discriminating the two species. The estimates of genetic differentiation detected by EST-SSRs were compared to those reported previously. The transferability across palm taxa to two Cocos nucifera and six exotic palms is also presented. The polymerase chain reaction (PCR) products of three primer-pairs detected in E. guineensis, E. oleifera, C. nucifera and Jessinia bataua were cloned and sequenced. Sequence alignments showed mutations within the SSR site and the flanking regions. Phenetic analysis based on the sequence data revealed that C. nucifera is closer to oil palm compared to J. bataua; consistent with the taxanomic classification. PMID:20861564

  4. Below-ground plant parts emit herbivore-induced volatiles: olfactory responses of a predatory mite to tulip bulbs infested by rust mites.

    PubMed

    Aratchige, N S; Lesna, I; Sabelis, M W

    2004-01-01

    Although odour-mediated interactions among plants, spider mites and predatory mites have been extensively studied above-ground, belowground studies are in their infancy. In this paper, we investigate whether feeding by rust mites (Aceria tulipae) cause tulip bulbs to produce odours that attract predatory mites (Neoseiulus cucumeris). Since our aim was to demonstrate such odours and not their relevance under soil conditions, the experiments were carried out using a classic Y-tube olfactometer in which the predators moved on a Y-shaped wire in open air. We found that food-deprived female predators can discriminate between odours from infested bulbs and odours from uninfested bulbs or artificially wounded bulbs. No significant difference in attractiveness to predators was found between clean bulbs and bulbs either wounded 30 min or 3 h before the experiment. These results indicate that it may not be simply the wounding of the bulbs, but rather the feeding by rust mites, which causes the bulb to release odours that attract N. cucumeris. Since bulbs are belowground plant structures, the olfactometer results demonstrate the potential for odour-mediated interactions in the soil. However, their importance in the actual soil medium remains to be demonstrated. PMID:15285135

  5. Palm oil: a healthful and cost-effective dietary component.

    PubMed

    Ong, A S H; Goh, S H

    2002-03-01

    Palm oil is an excellent choice for food manufacturers because of its nutritional benefits and versatility. The oil is highly structured to contain predominantly oleic acid at the sn2-position in the major triacylglycerols to account for the beneficial effects described in numerous nutritional studies. Oil quality and nutritional benefits have been assured for the variety of foods that can be manufactured from the oil directly or from blends with other oils while remaining trans-free. The oxidative stability coupled with the cost-effectiveness is unparalleled among cholesterol-free oils, and these values can be extended to blends of polyunsaturated oils to provide long shelf-life. Presently the supply of genetic-modification-free palm oil is assured at economic prices, since the oil palm is a perennial crop with unparalleled productivity. Numerous studies have confirmed the nutritional value of palm oil as a result of the high monounsaturation at the crucial 2-position of the oil's triacylglycerols, making the oil as healthful as olive oil. It is now recognized that the contribution of dietary fats to blood lipids and cholesterol modulation is a consequence of the digestion, absorption, and metabolism of the fats. Lipolytic hydrolysis of palm oil glycerides containing predominantly oleic acid at the 2 position and palmitic and stearic acids at the 1 and 3 positions allows for the ready absorption of the 2-monoacrylglycerols while the saturated free fatty acids remain poorly absorbed. Dietary palm oil in balanced diets generally reduced blood cholesterol, low-density lipoprotein (LDL) cholesterol, and triglycerides while raising the high-density lipoprotein (HDL) cholesterol. Improved lipoprotein(a) and apo-A1 levels were also demonstrated from palm oil diets; an important benefits also comes from the lowering of blood triglycerides (or reduced fat storage) as compared with those from polyunsaturated fat diets. Virgin palm oil also provides carotenes apart from tocotrienols and tocopherols that have been shown to be powerful antioxidants and potential mediators of cellular functions. These compounds can be antithrombotic, cause an increase of the prostacyclin/thromboxane ratio, reduce restenosis, and inhibit HMG-CoA-reductase (thus reducing) cholesterol biosynthesis). Red palm oil is a rich source of beta-carotene as well as of alpha-tocopherol and tocotrienols. PMID:11975364

  6. 76 FR 36014 - Proposed Amendment of Class C Airspace; Palm Beach International Airport, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-21

    ...11-AWA-2] RIN 2120-AA66 Proposed Amendment of Class C Airspace; Palm Beach International Airport, FL...modify the Palm Beach International Airport Class C airspace area by raising the floor of Class C airspace above Palm Beach County Park...

  7. 76 FR 77383 - Amendment of Class C Airspace; Palm Beach International Airport, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-13

    ...Airspace Docket No. 11-AWA-2] Amendment of Class C Airspace; Palm Beach International Airport, FL...the Palm Beach International Airport, FL, Class C airspace area by raising the floor of Class C airspace over Palm Beach County Park Airport....

  8. Losing shuttle program to hurt Space Coast far worse than Palm Beach County

    E-print Network

    Belogay, Eugene A.

    Losing shuttle program to hurt Space Coast far worse than Palm Beach County By JEFF OSTROWSKI Palm Beach Post Staff Writer Updated: 5:07 p.m. Sunday, July 3, 2011 Posted: 4:59 p.m. Sunday, July 3, 2011 agency Space Florida. For many in Palm Beach County's aerospace industry, the shuttle's demise merits

  9. 78 FR 11094 - Safety Zone; Lake Worth Dredge Operations, Lake Worth Inlet; West Palm Beach, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-15

    ...Operations, Lake Worth Inlet; West Palm Beach, FL AGENCY: Coast Guard, DHS. ACTION...safety zone on Lake Worth Inlet, West Palm Beach, Florida, to provide for the safety of...conducted on Lake Worth Inlet in West Palm Beach, Florida. These operations will...

  10. South Florida Sun-Sentinel.com Job growth is expanding in West Palm Beach, Miami

    E-print Network

    Belogay, Eugene A.

    South Florida Sun-Sentinel.com Job growth is expanding in West Palm Beach, Miami By Donna Gehrke in Palm Beach and Broward counties, according to new projections released Monday by a leading economist, and will rise by 1.5 percent in Palm Beach County, Wells Fargo Securities senior economist Mark Vitner said

  11. For first time since 2007, food stamp use drops in state, Palm Beach County

    E-print Network

    Fernandez, Eduardo

    For first time since 2007, food stamp use drops in state, Palm Beach County March 13, 2013|By Donna in Palm Beach County fell in February, according to data from the Florida Department of Children from last year when the number of food stamp recipients in Palm Beach County jumped nearly 14 percent

  12. 78 FR 25383 - Amendment of Class E Airspace; West Palm Beach, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-01

    ...Amendment of Class E Airspace; West Palm Beach, FL AGENCY: Federal Aviation Administration...amends Class E Airspace in the West Palm Beach, FL area, as new Standard Instrument...Procedures (SIAPs) have been developed at Palm Beach County Park Airport. Airspace...

  13. BERKELEY REVIEW OF LATIN AMERICAN STUDIES 48 People, Palm Trees, and Survival

    E-print Network

    Kammen, Daniel M.

    BERKELEY REVIEW OF LATIN AMERICAN STUDIES 48 People, Palm Trees, and Survival P alm oil, which. As a case in point, Milleron noted that in Colombia, the expansion of African palm tree plantations has led, the Amazon's indigenous peoples have a long history of sustainably managing wild palm trees, which they use

  14. Complex Games and Palm Computers Pieter Spronck and Jaap van den Herik

    E-print Network

    Spronck, Pieter

    with even the latest PC games. Most Palm games have a simple design. This simplicity is caused by two1 Complex Games and Palm Computers Pieter Spronck and Jaap van den Herik Universiteit Maastricht/IKAT Abstract: Today's Palm computers face practical restrictions when playing complex games. This article deals

  15. Revival of an ancient starch crop: a review of the agronomy of the sago palm

    Microsoft Academic Search

    M. Flach; D. L. Schuiling

    1988-01-01

    Since 1971 there has been a revival of interest in the possibilities for cultivation of the true sago palm, Metroxylon spp. Agronomic and economic research shows that the palm can become an important starch producing crop. Many queries concerning the agronomy of the crop have been solved. The palm is especially suited to humid tropical lowlands. It is fairly salinity

  16. REVIEW Open Access Ritual uses of palms in traditional medicine in

    E-print Network

    Schierup, Mikkel Heide

    REVIEW Open Access Ritual uses of palms in traditional medicine in sub-Saharan Africa: a review palms and found information about ritual uses in 26 of them. At least 12 palm species in sub-Saharan Background Traditional medicines in rural sub-Saharan communities recognize that the occurrence of disease

  17. Utilization of oil palm as a source of renewable energy in Malaysia

    Microsoft Academic Search

    S. Sumathi; S. P. Chai; A. R. Mohamed

    2008-01-01

    Malaysia is currently the world's largest producer and exporter of palm oil. Malaysia produces about 47% of the world's supply of palm oil. Malaysia also accounts the highest percentage of global vegetable oils and fats trade in year 2005. Besides producing oils and fats, at present there is a continuous increasing interest concerning oil palm renewable energy. One of the

  18. Hydrogen and syngas yield from residual branches of oil palm tree using steam gasification

    Microsoft Academic Search

    Nimit Nipattummakul; Islam I. Ahmed; Ashwani K. Gupta; Somrat Kerdsuwan

    2011-01-01

    Wastes produced during oil palm production from agro-industries have great potential as a source of renewable energy in agriculturally rich countries, such as Thailand and Malaysia. Clean chemical energy recovery from oil palm residual branches via steam gasification is investigated here. A semi-batch reactor was used to investigate the gasification of palm trunk wastes at different reactor temperatures in the

  19. The variability of the sago palm and the need and possibilities for its conservation

    Microsoft Academic Search

    D. L. Schuiling

    1995-01-01

    In the wild and in cultivation, sago palm (Metroxylon sagu Rottb.) is mostly propagated vegetatively through its suckers. Generative propagation occurs to a limited extent; there are strong indications of sago palm being largely an obligatory cross-pollinator. This opens the possibility of the existence of an endless amount of clonal varieties of sago palm, which is confirmed by the endless

  20. The effect of palm oil supplementation on growth and carcass composition of growing lambs

    E-print Network

    Boyer, Edmond

    The effect of palm oil supplementation on growth and carcass composition of growing lambs M Hilmi Selangor, Malaysia Palm oil is considered as a cheap source of energy supplementation in a commercial feed and Diet C animals were, respectively, supplemented with 20 g and 40 g of palm oil per animal per day

  1. PALM startup /shutdown guide If you are the first user of the day

    E-print Network

    Goldman, Robert D.

    if you use oil lens. 3. Exit PALM Robo software. Log off computer. 4. Do NOT turn mercury lamp away. 2. Use and lens paper with Sparkle to clean the objective lens if you oil lens. 3. Exit PALM RoboPALM startup /shutdown guide If you are the first user of the day 1. Turn on the two power strips

  2. Journal of Biotechnology 108 (2004) 253263 Bioreactor culture of oil palm (Elaeis guineensis) and effects

    E-print Network

    Sinskey, Anthony J.

    Journal of Biotechnology 108 (2004) 253­263 Bioreactor culture of oil palm (Elaeis guineensis, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA c Malaysian Palm Oil December 2003; accepted 18 December 2003 Abstract We report the successful culture of oil palm (Elaeis

  3. Regulatory Mechanisms Underlying Oil Palm Fruit Mesocarp Maturation, Ripening, and Functional

    E-print Network

    Boyer, Edmond

    Regulatory Mechanisms Underlying Oil Palm Fruit Mesocarp Maturation, Ripening, and Functional tissue of the oil palm (Elaeis guineensis) fruit the main source of edible oil for the world of these two outstanding metabolic characters in the oil palm mesocarp. Mor- phological, cellular, biochemical

  4. Field studies of leaf gas exchanges in oil palm tree (Elaeis guineensis Jacq.)

    E-print Network

    Paris-Sud XI, Université de

    Field studies of leaf gas exchanges in oil palm tree (Elaeis guineensis Jacq.) E. Dufrene B This study is part of a larger research pro- gram on climatic and biological factors affecting oil palm yield (A) in oil palm. Most of them have used young plants under laboratory conditions to study effects

  5. Development and material properties of new hybrid plywood from oil palm biomass

    Microsoft Academic Search

    H. P. S. Abdul Khalil; M. R. Nurul Fazita; A. H. Bhat; M. Jawaid; N. A. Nik Fuad

    2010-01-01

    Shortage of wood as a raw material has forced wood-based industries to find alternative local raw materials. Currently, oil palm biomass is undergoing research and development (R & D) and appears to be the most viable alternative. This work examines the conversion of oil palm trunk (OPT) and oil palm empty fruit bunches (OPEFB) into new plywood and analyses its

  6. 78 FR 6258 - Proposed Amendment of Class E Airspace; West Palm Beach, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-30

    ...INFORMATION CONTACT: John Fornito, Operations Support...above the surface in the West Palm Beach, FL area...Class E airspace in the West Palm Beach, FL, area...DESIGNATION OF CLASS A, B, C, D, AND E AIRSPACE...ASO FL E5 West Palm Beach, FL...

  7. SPIDER MITES ON ORNAMENTALS Clifford S. Sadof and Timothy J. Gibb, Extension Entomologists

    E-print Network

    Ginzel, Matthew

    numbers when plants are sheltered and have a southern exposure. Controls are more likely to be needed when. Oak red mite Oligonychus bicolor (Banks) Plants attacked: Oak, birch, beech, chestnut, elm, maple

  8. Mites are the most common vectors of the fungus Gondwanamyces proteae in Protea infructescences

    E-print Network

    also been implicated as vector of Ophiostoma spores on P. repens and belongs to the same genus of mites that vector Ophiostoma spp. as- sociated with pine-infesting bark beetles in the Northern Hemisphere. Ş 2011

  9. Design and implementation of liquid cooling system for ArchiMITes vehicle

    E-print Network

    Hui, Sam, S.B. Massachusetts Institute of Technology

    2011-01-01

    MIT Vehicle Design Summit is building ArchiMITes, a lightweight hybrid vehicle with a modular auxiliary power unit. For testing purposes, the vehicle platform will first be built as an all-electric vehicle. It will be ...

  10. Identification of vaccine candidates against the Poultry Red Mite, Dermanyssus gallinae 

    E-print Network

    Wright, Harry Watmore

    2011-07-05

    The poultry red mite Dermanyssus gallinae (De Geer) is a blood feeding ectoparasite that infests many bird species. Economically it is the most important parasite affecting egg-laying hens. The aim of this study was to ...

  11. Novel control of the sheep scab mite, Psoroptes ovis, through the application of bacteriophage therapy 

    E-print Network

    Hall, Sarah Alice

    2011-11-24

    trails were used to isolate bacteriophage from environmental samples. Sixteen bacteriophage were successfully isolated, which were infective against three mite faecal bacteria. Isolated bacteriophage were characterised by a number of methods including...

  12. Influence of diet conditions on predation response of a predatory mite to a polyphagous insect pest

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Chilli thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae), an invasive polyphagous species, is an economically important pest. A modified standard petri dish assay method was employed to examine the functional response and predation capacity of predatory mites (Amblyseius swirskii Anthias-...

  13. Predation risk affects diapause induction in the spider mite Tetranychus urticae.

    PubMed

    Kroon, Annemarie; Veenendaal, René L; Bruin, Jan; Egas, Martijn; Sabelis, Maurice W

    2004-01-01

    Whenever diapause induction triggers movement into another microhabitat or the development of protective morphological structures, this may also alter predation risk. If the risk of being eaten is lower in the diapause phase, then there may be selection favouring diapause induction in response to predators or their cues. In this article, we studied the effect of the predatory mite Typhlodromus pyri on diapause induction in the spider mite Tetranychus urticae. We used a Greek strain because under long-night photoperiods and low temperature only part of the population enters diapause, thereby leaving room for the impact of another factor. In spider mite groups under predation, the percentage diapause induction increased whenever night-lengths were such that diapause was induced (13-16 h of night). Given this diapause induction in response to predation risk, the question arises whether entering diapause helps spider mites to escape from predation and contribute more offspring to the spring generation next year. PMID:15651527

  14. [The phenomenon of phylogenetic synhospitality in acariform mites (acari: acariformes)--the permanent parasites of vertebrates].

    PubMed

    Bochkov, A V; Mironov, S V

    2008-01-01

    The term synhospitality means the association of two or more closely related parasite species with one host species (Eichler, 1966). The cases of two or three synhospitalic species are known from the same host species, and especially ones where parasites were recorded from different parts of the host range, are quite common. The most ordinary reason causing synhospitality in permanent parasites is the host switching. Nevertheless, there are a number of synhospitality cases, where the parasite complex is monophyletic because evolved on a single host species. The special term--"phylogenetic synhospitality" (FS) is proposed for these cases of synhospitality. Most known cases of FS in acariform mites, permanent parasites of vertebrates, are analysed. It is found out that both astigmatan and prostigmatan parasite mites demonstrate a numbers of FS. The majority of these examples represent parasitism of two or three synhospitalic parasite species. Impressive examples of FS involving a number of synhospitalic species is shown by only astigmatan mites inhabiting the fur of mammals or plumage of birds. Most known examples involving four or more mite species are discussed: 51 mite species of the genus Schizocarpus (Chirodiscidae) parasitizing Castor fiber and C. canadensis (Castoridae); 6 species of Listrophorus spp. (Listrophoridae) from Ondatra zibethicus (Cricetidae); 23 species of Listrophoroides s. 1. (Atopomelidae) from Maxomys surifer (Muridae); 21 species of Cytostethum (Atomelidae) from Potorous tridactylus (Potoridae); 4 species of Listrophoroides (Afrolistrophoroides) from Malacomys longipes (Muridae); 7 species of Fainalges (Xolalgidae) from Aratinga holochlora (Psittacidae); 4 species of Zygepigynia (Pteronyssidae) from Chrysocolaptes lucidus (Picidae). The main reason of FS is that, in spite of the Fahrenholz's rule, the speciation of many parasites proceeds much more intensively than in their hosts because of the more rapid replacement of the parasitic generations. The first factor causing FS is the mite speciation it temporary segregated populations of the host (allopatric speciation). In this case, the "multispecies complexes" appeared after the subsequent reintegration of the host populations formerly isolated. The second factor is the speciation due to the specialization of mites to local microhabitats in the fur or plumage of host (sympatric or synxenic speciation). The second way of speciation is most characteristic for mites with highly specialized attaching structures. The phenomenon of FS more resides in ectoparasites of mammals rather than in feather mites in spite of much more structural complicacy of plumage rather than the fur. The high mobility of birds and wide dispersion of their new generations probably embarrass the process of sympatric speciation in their parasites. As a rule, only really significant geographical barriers play role for population isolation in birds. Thus, it could be concluded that two independent factors or their combination lead to FS. (i) The complex and/or disjunctive host range giving a possibility for allopatric speciation in parasites. (ii) The deep mite specialization to local microhabitats on the host body causing sympatric (synxenic) speciation. Fur of mammals and plumage of birds are very complicated in structure and microconditions and provide a considerable number of different microhabitats for mites inhabiting them. The prevalence of one of these two factors depends on the biological peculiarities of both parasites and their hosts. In mites with lesser specialized attaching organs, for example in atopomelids, allopatric speciation dominates. In mites with strongly specialized attaching organs, for example in listrophorids or chirodiscids, both pathways of speciation may take place. In feather mites, sympatric speciation should be more probable due to quite complicate and various structure of feathers in avian hosts. In fur mites, sympatric speciation is more likely in mites parasitizing hosts with peculiar ecology, for example in semiaquatic rodent

  15. Parasitic scabies mites and associated bacteria joining forces against host complement defence.

    PubMed

    Swe, P M; Reynolds, S L; Fischer, K

    2014-11-01

    Scabies is a ubiquitous and contagious skin disease caused by the parasitic mite Sarcoptes scabiei Epidemiological studies have identified scabies as a causative agent for secondary skin infections caused by Staphylococcus aureus and Streptococcus pyogenes. This is an important notion, as such bacterial infections can lead to serious downstream life-threatening complications. As the complement system is the first line of host defence that confronts invading pathogens, both the mite and bacteria produce a large array of molecules that inhibit the complement cascades. It is hypothesised that scabies mite complement inhibitors may play an important role in providing a favourable micro-environment for the establishment of secondary bacterial infections. This review aims to bring together the current literature on complement inhibition by scabies mites and bacteria associated with scabies and to discuss the proposed molecular link between scabies and bacterial co-infections. PMID:25081184

  16. Palm Vein Verification Using Multiple Features and Locality Preserving Projections

    PubMed Central

    Bu, Wei; Wu, Xiangqian; Zhao, Qiushi

    2014-01-01

    Biometrics is defined as identifying people by their physiological characteristic, such as iris pattern, fingerprint, and face, or by some aspects of their behavior, such as voice, signature, and gesture. Considerable attention has been drawn on these issues during the last several decades. And many biometric systems for commercial applications have been successfully developed. Recently, the vein pattern biometric becomes increasingly attractive for its uniqueness, stability, and noninvasiveness. A vein pattern is the physical distribution structure of the blood vessels underneath a person's skin. The palm vein pattern is very ganglion and it shows a huge number of vessels. The attitude of the palm vein vessels stays in the same location for the whole life and its pattern is definitely unique. In our work, the matching filter method is proposed for the palm vein image enhancement. New palm vein features extraction methods, global feature extracted based on wavelet coefficients and locality preserving projections (WLPP), and local feature based on local binary pattern variance and locality preserving projections (LBPV_LPP) have been proposed. Finally, the nearest neighbour matching method has been proposed that verified the test palm vein images. The experimental result shows that the EER to the proposed method is 0.1378%. PMID:24693230

  17. Production of haploids and doubled haploids in oil palm

    PubMed Central

    2010-01-01

    Background Oil palm is the world's most productive oil-food crop despite yielding well below its theoretical maximum. This maximum could be approached with the introduction of elite F1 varieties. The development of such elite lines has thus far been prevented by difficulties in generating homozygous parental types for F1 generation. Results Here we present the first high-throughput screen to identify spontaneously-formed haploid (H) and doubled haploid (DH) palms. We secured over 1,000 Hs and one DH from genetically diverse material and derived further DH/mixoploid palms from Hs using colchicine. We demonstrated viability of pollen from H plants and expect to generate 100% homogeneous F1 seed from intercrosses between DH/mixoploids once they develop female inflorescences. Conclusions This study has generated genetically diverse H/DH palms from which parental clones can be selected in sufficient numbers to enable the commercial-scale breeding of F1 varieties. The anticipated step increase in productivity may help to relieve pressure to extend palm cultivation, and limit further expansion into biodiverse rainforest. PMID:20929530

  18. Palm vein verification using multiple features and locality preserving projections.

    PubMed

    Al-Juboori, Ali Mohsin; Bu, Wei; Wu, Xiangqian; Zhao, Qiushi

    2014-01-01

    Biometrics is defined as identifying people by their physiological characteristic, such as iris pattern, fingerprint, and face, or by some aspects of their behavior, such as voice, signature, and gesture. Considerable attention has been drawn on these issues during the last several decades. And many biometric systems for commercial applications have been successfully developed. Recently, the vein pattern biometric becomes increasingly attractive for its uniqueness, stability, and noninvasiveness. A vein pattern is the physical distribution structure of the blood vessels underneath a person's skin. The palm vein pattern is very ganglion and it shows a huge number of vessels. The attitude of the palm vein vessels stays in the same location for the whole life and its pattern is definitely unique. In our work, the matching filter method is proposed for the palm vein image enhancement. New palm vein features extraction methods, global feature extracted based on wavelet coefficients and locality preserving projections (WLPP), and local feature based on local binary pattern variance and locality preserving projections (LBPV_LPP) have been proposed. Finally, the nearest neighbour matching method has been proposed that verified the test palm vein images. The experimental result shows that the EER to the proposed method is 0.1378%. PMID:24693230

  19. Regioisomerism of triacylglycerols in lard, tallow, yolk, chicken skin, palm oil, palm olein, palm stearin, and a transesterified blend of palm stearin and coconut oil analyzed by tandem mass spectrometry.

    PubMed

    Kallio, H; Yli-Jokipii, K; Kurvinen, J P; Sjövall, O; Tahvonen, R

    2001-07-01

    Triacylglycerols (TAG) of lard, tallow, egg yolk, chicken skin, palm oil, palm olein, palm stearin, and a transesterified blend of palm stearin and coconut oil (82:18) were investigated by chemical ionization and collision-induced dissociation tandem mass spectrometry. Accurate molecular level information of the regioisomeric structures of individual TAGs was achieved. When existing in a TAG molecule of lard, palmitic acid occupied 90-100% of the sn-2 position. Within the major fatty acid combinations in tallow TAGs, the secondary position sn-2 was preferentially occupied in the decreasing order by oleoyl > palmitoyl > stearoyl residues, the order in saturated TAGs being myristoyl > stearoyl = palmitoyl. TAGs in egg yolk were more asymmetric than in chicken skin, with linoleic acid highly specifically attached in the yolk sn-2 carbon. Nearly 50% of yolk TAGs contained 52 carbon atoms with two or three double bonds. Linoleic, oleic, and palmitic acids were in the sn-2 location in decreasing quantities in palm oil and its fractions. Triacylglycerols of equal molecular weight behaved similarly in the fractionation process. Randomization of the parent oil TAGs was seen in the transesterified oil. The tandem mass spectrometric analysis applied provided detailed information of the distribution of fatty acids in individual combinations in TAGs. PMID:11453776

  20. Palm Reversal Errors in Native-Signing Children with Autism

    PubMed Central

    Shield, Aaron; Meier, Richard P.

    2012-01-01

    Children with autism spectrum disorder (ASD) who have native exposure to a sign language such as American Sign Language (ASL) have received almost no scientific attention. This paper reports the first studies on a sample of five native-signing children (four deaf children of deaf parents and one hearing child of deaf parents; ages 4;6 to 7;5) diagnosed with ASD. A domain-general deficit in the ability of children with ASD to replicate the gestures of others is hypothesized to be a source of palm orientation reversal errors in sign. In Study 1, naturalistic language samples were collected from three native-signing children with ASD and were analyzed for errors in handshape, location, movement and palm orientation. In Study 2, four native-signing children with ASD were compared to 12 typically-developing deaf children (ages 3;7 to 6;9, all born to deaf parents) on a fingerspelling task. In both studies children with ASD showed a tendency to reverse palm orientation on signs specified for inward/outward orientation. Typically-developing deaf children did not produce any such errors in palm orientation. We conclude that this kind of palm reversal has a perceptual rather than a motoric source, and is further evidence of a “self-other mapping” deficit in ASD. PMID:22981637

  1. Effect of high pressure microfluidization on the crystallization behavior of palm stearin - palm olein blends.

    PubMed

    Han, Lijuan; Li, Lin; Li, Bing; Zhao, Lei; Liu, Guoqin; Liu, Xinqi; Wang, Xuede

    2014-01-01

    Moderate and high microfluidization pressures (60 and 120 MPa) and different treatment times (once and twice) were used to investigate the effect of high-pressure microfluidization (HPM) treatment on the crystallization behavior and physical properties of binary mixtures of palm stearin (PS) and palm olein (PO). The polarized light microscopy (PLM), texture analyzer, X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques were applied to analyze the changes in crystal network structure, hardness, polymorphism and thermal property of the control and treated blends. PLM results showed that HPM caused significant reductions in maximum crystal diameter in all treated blends, and thus led to changes in the crystal network structure, and finally caused higher hardness in than the control blends. The XRD study demonstrated that HPM altered crystalline polymorphism. The HPM-treated blends showed a predominance of the more stable ?' form, which is of more interest for food applications, while the control blend had more ?- and ?-form. This result was further confirmed by DSC observations. These changes in crystallization behavior indicated that HPM treatment was more likely to modify the crystallization processes and nucleation mechanisms. PMID:24879582

  2. Optimizing palm oil and palm stearin utilization for sensory and textural properties of chicken frankfurters.

    PubMed

    Tan, S S; Aminah, A; Zhang, X G; Abdul, S B

    2006-03-01

    This study was designed to explore the potential of refined, bleached and deodorized (RBD) palm oil (PO) and palm stearin (POs) utilization in chicken frankfurters. A 10 points augmented simplex-centroid design was used to study the effect of chicken fat (CF), PO and POs as well as the interaction of these fats on the emulsion, textural and sensory properties of chicken frankfurters. All frankfurters were formulated to contain approx 25% fat, 52% moisture and 10% protein. No significant difference was found in end chopping temperatures of all meat batters even though the temperature of PO and POs upon incorporation into meat batters was 50°C higher than CF. Strong emulsions were formed as no fluid losses were observed in all the meat batters tested after heating. Texture profiles of the frankfurters containing PO and/or CF were quite similar, but increment of POs raised hardness, chewiness, and shear hardness of the frankfurters. Acceptability of the frankfurters was evaluated using hedonic test. Panelists found no difference in hardness preference between frankfurters made from totally CF and PO, while frankfurters made from POs were rated as hard and brittle. CF was important in determining acceptability of the frankfurters, as reduction of CF in formulation resulted in lower scores in chicken flavor, juiciness, oiliness and overall acceptance of the frankfurters. Frankfurters with sensory acceptability comparable to a commercial one were found to comprise of more than 17% CF, and less than 67% PO and 17% POs of the fat blend. PMID:22061722

  3. Two new species of the feather mite family Gabuciniidae (Acariformes: Pterolichoidea) from wrens (Passeriformes: Troglodytidae).

    PubMed

    Mironov, Sergey V; Literak, Ivan; Sychra, Oldrich; Capek, Miroslav

    2014-10-01

    Two new species of the feather mite family Gabucinidae (Acari: Astigmata) are described from birds of the family Troglodytidae (Passeriformes) from Central America: Piciformobia cinnycerthiae sp. nov. from Cinnycerthia unirufa (Lafresnaye) in Ecuador, and P. henicorhinae sp. nov. from Henicorhina leucosticte (Cabanis) in Costa Rica. These are the first records of mites of the genus Piciformobia Gaud et Atyeo, 1975 from passerine hosts. A renewed diagnosis of the genus Piciformobia and key to all known species are provided. PMID:25236264

  4. Gene Pyramiding of Peptidase Inhibitors Enhances Plant Resistance to the Spider Mite Tetranychus urticae

    PubMed Central

    Santamaria, Maria Estrella; Cambra, Inés; Martinez, Manuel; Pozancos, Clara; González-Melendi, Pablo; Grbic, Vojislava; Castańera, Pedro; Ortego, Felix; Diaz, Isabel

    2012-01-01

    The two-spotted spider mite Tetranychus urticae is a damaging pest worldwide with a wide range of host plants and an extreme record of pesticide resistance. Recently, the complete T. urticae genome has been published and showed a proliferation of gene families associated with digestion and detoxification of plant secondary compounds which supports its polyphagous behaviour. To overcome spider mite adaptability a gene pyramiding approach has been developed by co-expressing two barley proteases inhibitors, the cystatin Icy6 and the trypsin inhibitor Itr1 genes in Arabidopsis plants by Agrobacterium-mediated transformation. The presence and expression of both transgenes was studied by conventional and quantitative real time RT-PCR assays and by indirect ELISA assays. The inhibitory activity of cystatin and trypsin inhibitor was in vitro analysed using specific substrates. Single and double transformants were used to assess the effects of spider mite infestation. Double transformed lines showed the lowest damaged leaf area in comparison to single transformants and non-transformed controls and different accumulation of H2O2 as defence response in the leaf feeding site, detected by diaminobenzidine staining. Additionally, an impact on endogenous mite cathepsin B- and L-like activities was observed after feeding on Arabidopsis lines, which correlates with a significant increase in the mortality of mites fed on transformed plants. These effects were analysed in view of the expression levels of the target mite protease genes, C1A cysteine peptidase and S1 serine peptidase, identified in the four developmental mite stages (embryo, larvae, nymphs and adults) performed using the RNA-seq information available at the BOGAS T. urticae database. The potential of pyramiding different classes of plant protease inhibitors to prevent plant damage caused by mites as a new tool to prevent pest resistance and to improve pest control is discussed. PMID:22900081

  5. Oribatid mites (Acari, Oribatida) in Soils of the Russian Far East .

    PubMed

    Ryabinin, Nikolay A

    2015-01-01

    The present paper reviews the taxonomic studies of the mite suborder Oribatida in the Russian Far East and gives a checklist of 596 species and subspecies in 228 genera, representing 84 families. The checklist includes data from more than 230 habitats of the Russian Far East from Chukotka to the Southern Primorye. In addition, a short historical and biogeographical review of oribatid mites study in the Russian Far East is presented. PMID:25661942

  6. [Gamasid mites of common voles in the central Volga River region].

    PubMed

    Borisova, V I; Nazarova, I V

    1986-01-01

    The specific composition of gamasid mites from three species of voles (Microtus arvalis Pall., M. agrestis L., M. oeconomus Pall.) is given. Forest, field and flood-land groupings of the common vole having distinct phenotypical differences are characterized by differences in the structure of their parasite fauna. In the forest the number of meadow and meadow-field species decreases while that of forest species of mites regularly increases. PMID:2942832

  7. The control of eriophyoid mites: state of the art and future challenges

    Microsoft Academic Search

    Thomas Van Leeuwen; Johan Witters; Ralf Nauen; Carlo Duso; Luc Tirry

    2010-01-01

    The superfamily of the Eriophyoidea is a large and diverse group of mites, including a number of species of economic importance,\\u000a mainly on perennial plants in agriculture and forestry. This review focuses on the economic importance and pest status of\\u000a this group of mites, with emphasis on some genera. The available acaricide portfolio is reviewed and the influence of EU

  8. Increased transcription of Glutathione S-transferases in acaricide exposed scabies mites

    PubMed Central

    2010-01-01

    Background Recent evidence suggests that Sarcoptes scabiei var. hominis mites collected from scabies endemic communities in northern Australia show increasing tolerance to 5% permethrin and oral ivermectin. Previous findings have implicated detoxification pathways in developing resistance to these acaricides. We investigated the contribution of Glutathione S-transferase (GST) enzymes to permethrin and ivermectin tolerance in scabies mites using biochemical and molecular approaches. Results Increased in vitro survival following permethrin exposure was observed in S. scabiei var. hominis compared to acaricide naďve mites (p < 0.0001). The addition of the GST inhibitor diethyl maleate restored in vitro permethrin susceptibility, confirming GST involvement in permethrin detoxification. Assay of GST enzymatic activity in mites demonstrated that S. scabiei var. hominis mites showed a two-fold increase in activity compared to naďve mites (p < 0.0001). Increased transcription of three different GST molecules was observed in permethrin resistant S. scabiei var. canis- mu 1 (p < 0.0001), delta 1 (p < 0.001), and delta 3 (p < 0.0001). mRNA levels of GST mu 1, delta 3 and P-glycoprotein also significantly increased in S. scabiei var. hominis mites collected from a recurrent crusted scabies patient over the course of ivermectin treatment. Conclusions These findings provide further support for the hypothesis that increased drug metabolism and efflux mediate permethrin and ivermectin resistance in scabies mites and highlight the threat of emerging acaricide resistance to the treatment of scabies worldwide. This is one of the first attempts to define specific genes involved in GST mediated acaricide resistance at the transcriptional level, and the first application of such studies to S. scabiei, a historically challenging ectoparasite. PMID:20482766

  9. Distortion of the spermathecae of phytoseiid mites (Acari: Phytoseiidae) in slide preparation.

    PubMed

    Jolly, R L; Solomon, M G; Fitzgerald, J D

    2001-01-01

    The shape and dimensions of the spermathecae are taxonomically important characteristics in phytoseiid mites. In experiments with Neoseiulus californicus (McGregor) and Typhlodromus pyri Scheuten, the shape of the cervix of the spermatheca changed considerably and its diameter was increased by 42-49% when mites were flattened, compared to being mounted with 140 microm spacers underneath the coverslips. Dimensions of the dorsal shield were also affected by flattening. increasing by 3-5%. PMID:11523918

  10. The effect of chitin metabolic effectors on the population increase of stored product mites

    Microsoft Academic Search

    Jitka Stara; Tomas Erban; Jan Hubert

    2010-01-01

    The study tested the effect of the chitin metabolic effectors, teflubenzuron, diflubenzuron, and calcofluor, and a combination\\u000a of a chitinase and soybean trypsin inhibitor (STI) on the population growth of eight species of stored product mites under\\u000a laboratory conditions. The compounds were incorporated into the diets of the mites in concentrations ranging from 0.01 to\\u000a 50 mg g?1. The final populations of

  11. Temperature-dependent population growth of three species of stored product mites (Acari: Acaridida)

    Microsoft Academic Search

    Gamila Aspaly; Vaclav Stejskal; Stano Pekár; Jan Hubert

    2007-01-01

    The pest potential of stored product mites depends on the reproduction rate that is affected by the environmental conditions.\\u000a In this study we investigated the effect of temperature, ranging from 5 to 35°C, on the population growth of three important\\u000a mite species, Acarus siro, Tyrophagus putrescentiae and Auleroglyphus ovatus at 85% r.h. Starting with 10 individuals the population increase of

  12. The Role of the House Dust Mite-Induced Innate Immunity in Development of Allergic Response

    Microsoft Academic Search

    Alain Jacquet

    2011-01-01

    House dust mite (HDM) represents one of the most common sources of aeroallergens worldwide and more than 50% of allergic patients are sensitized to these allergenic molecules. HDM allergy research in the past has been mainly focused on adaptive, mite allergen-dependent immune responses. In recent years it has become clear that, although the allergen-specific CD4+ Th2 cellsorchestrate HDM allergic response,the

  13. Acariform mites (Acariformes) - permanent symbionts of Hapalomys delacouri Thomas (Rodentia, Muridae) in Vietnam

    PubMed Central

    Bochkov, Andre V.; Abramov, Alexei V.

    2014-01-01

    Abstract Two new species of parasitic acariform mites (Acariformes) are described from the Delacour’s marmoset rat Hapalomys delacouri Thomas (Rodentia: Muridae) in Vietnam: Afrolistrophorus (Afrolistrophorus) hapalomys sp. n. (Listrophoridae) and Radfordia (Radfordia) mirabilis sp. n. (Myobiidae). Based on morphological evidences, we show that species of both mite genera associated with Hapalomys Blyth do not demonstrate clear phylogenetic links with respective congeners from rodents of the closest genus Chiropodomys Peters (Rodentia: Muridae). PMID:25561857

  14. Lung mites ( Pneumocoptes sp.) in bank voles ( Clethrionomys glareolus ) in Southwest Germany

    Microsoft Academic Search

    Brigitte Loos-Frank; M. Abel

    1983-01-01

    Lung mites of the genusPneumocoptes were found in bank voles (Clethrionomys glareolus) in Southwest Germany. This is the second time that lung mites have been recorded from a rodent in Europe1. In 1964 they were discovered in histological sections of a lung of a bank vole in France and were described asP. tiollaisi Doby, 1963. Only three more species of

  15. A Review of the Spider-Mite Problem on Grain Sorghum and Corn in West Texas.

    E-print Network

    Ehler, L. E.

    1974-01-01

    is apparently the indirect result of the evolution (or importation) of a genetic race (biotype) of spider-mites (presumably 0. pratensis) which can utilize these host plants more efficiently. Spider-mite outbreaks are closely correlated with reproductive... differing susceptibilities to acaricides (Smith and Bryan, 1951; Leigh, 1963) and because different species on the same host may inflict different hnds of damage to plants (Flaherty and Huffaker, 1970), it is necessary to obtain proper iden- tification...

  16. Effects of high copper concentrations on soil invertebrates (earthworms and oribatid mites)

    Microsoft Academic Search

    Bruno Streit

    1984-01-01

    Data in the literature on the toxicity and uptake of copper by soil invertebrates are contradictory. Copper toxicity and bioaccumulation studies were therefore performed using earthworms and oribatid mites. Field-simulating experiments in soil-filled plastic containers showed that earthworms try to escape moderately toxic situations and that they are much more sensitive than oribatid mites to temporary high Cu2+ concentrations in

  17. Modelling the potential distribution of the invasive tomato red spider mite, Tetranychus evansi (Acari: Tetranychidae)

    Microsoft Academic Search

    Alain Migeon; Francisco Ferragut; Lucía Adriana Escudero-Colomar; Komi Fiaboe; Markus Knapp; Gilberto J. de Moraes; Eddie Ueckermann; Maria Navajas

    2009-01-01

    Predicting the potential geographical distribution of a species is particularly important for pests with strong invasive abilities.\\u000a Tetranychus evansi Baker & Pritchard, possibly native to South America, is a spider mite pest of solanaceous crops. This mite is considered\\u000a an invasive species in Africa and Europe. A CLIMEX model was developed to predict its global distribution. The model results\\u000a fitted

  18. A review on the factors affecting mite growth in stored grain commodities.

    PubMed

    Collins, D A

    2012-03-01

    A thorough review of the literature has identified the key factors and interactions that affect the growth of mite pests on stored grain commodities. Although many factors influence mite growth, the change and combinations of the physical conditions (temperature, relative humidity and/or moisture content) during the storage period are likely to have the greatest impact, with biological factors (e.g. predators and commodity) playing an important role. There is limited information on the effects of climate change, light, species interactions, local density dependant factors, spread of mycotoxins and action thresholds for mites. A greater understanding of these factors may identify alternative control techniques. The ability to predict mite population dynamics over a range of environmental conditions, both physical and biological, is essential in providing an early warning of mite infestations, advising when appropriate control measures are required and for evaluating control measures. This information may provide a useful aid in predicting and preventing mite population development as part of a risk based decision support system. PMID:22270112

  19. Toxicity of pesticides to predatory mites and insects in apple-tree site under field conditions.

    PubMed

    Raudonis, L; Surviliene, E; Valiuskaite, A

    2004-08-01

    Various applications of active ingredients of six fungicides and three insecticides and acaricides at normally recommended dosages were tested on two predatory mite species (Amblyseius andersoni Chant and Anthoseius bakeri Garman) from the family Phytoseiidae and on two predatory insect species (Coccinella septempunctata L. Chrysopa perla L.) dominantly present on apple trees. Small differences were found between fungicide treatments. On the trees treated with six fungicide applications the predatory mites and insects survived and increased to a high level, often 20-40 phytoseiids per 100 leaves and 4-8 predatory insects per sample unit. Only the active ingredients tolylfluanid and myclobutanil resulted in lower densities of predatory mites (10-20 phytoseiids per 100 leaves). One application of insecticides-acaricides (active ingredients: clofentezine, phosalone) showed no toxic effect on predatory mites and insects. Two applications of phosalone and one of alpha-cypermethrine were slightly or moderately toxic. Two applications of alpha-cypermethrine and eight routine sprays of various insecticides-acaricides and fungicides were very toxic and resulted in the lowest maximum number of predatory mites and insects, approximately 0-10 phytoseiids per 100 leaves and 1-4 predatory insects per sample unit. The toxicity of pesticides to predatory mites and insects is based on the toxicity of the pesticide' active ingredient and the spray frequency. The active ingredients of fungicides and only one or two applications of insecticides and acaricides were not or slightly toxic and could be used in integrated pest management. PMID:15269898

  20. Do Other Components of Bedding Dust Affect Sensitisation to House Dust Mites?

    PubMed Central

    Smith, Claire; Stanley, Thorsten; Crane, Julian; Siebers, Robert

    2011-01-01

    Bedding dust is a mixture of many components, of which the house dust mite (HDM) allergen, Der p 1, is the most allergenic. There has been little work to investigate the effect of other bedding dust components on HDM sensitisation. The objective of the study was to determine the effect of endotoxin in bedding dust on the allergic response in HDM-sensitised individuals. Twenty-nine house dust mite-sensitised adults were skin prick and allergen patch tested against a sterile solution of their own bedding dust and against a solution containing the same concentration of Der p 1 as the bedding solution for comparison. There was no significant difference in wheal size between the diluted house dust mite solution and the bedding dust in spite of their high levels of endotoxin. Symptomatic subjects had larger, but not statistically significant, responses to commercial house dust mite solution than asymptomatic subjects. Allergen patch test responses were negative in 22/29 of subjects using either bedding dust solutions or comparable diluted house dust mite solutions. An individual's own bedding dust does not appear to contain factors that enhance skin prick test or atopy patch test responses to house dust mites. PMID:23724237

  1. Determination of pH in Regions of the Midguts of Acaridid Mites

    PubMed Central

    Erban, Tomas; Hubert, Jan

    2010-01-01

    The pH of the guts of mites strongly affects their digestive processes. This study was carried out to determine the pH in the guts of 12 species of stored product and house dust mites. Eighteen pH indicators were chosen and offered to the mites in the feeding biotest. Based on the color changes of the indicators, the gut contents of acaridid mites were determined to be within a pH range of 4 to neutral. The gut contents showed a gradient in pH from the anterior to the posterior part. The anterior midgut (ventriculus and caeca) of most species had a pH ranging from 4.5 to 5, or slightly more alkaline for most of the species, while the middle midgut (intercolon/colon) had a pH of 5 to 6. Finally, the pH of the posterior midgut (postcolon) was between 5.5 and 7. Except for Dermatophagoides spp., no remarkable differences in the pH of the gut were observed among the tested species. Dermatophagoides spp. had a more acidic anterior midgut (a pH of 4 to 5) and colon (a pH of 5) with postcolon (a pH of below 6). The results characterizing in vivo conditions in the mite gut offer useful information to study the activity of mite digestive enzymes including their inhibitors and gut microflora. PMID:20572792

  2. Larval Chigger Mites Collected from Small Mammals in 3 Provinces, Korea

    PubMed Central

    Lee, In-Yong; Song, Hyeon-Je; Choi, Yeon-Joo; Shin, Sun-Hye; Choi, Min-Kyung; Kwon, So-Hyun; Shin, E-Hyun; Park, Chan; Kim, Heung-Chul; Klein, Terry A.; Park, Kyung-Hee

    2014-01-01

    A total of 9,281 larval chigger mites were collected from small mammals captured at Hwaseong-gun, Gyeonggi-do (Province) (2,754 mites from 30 small mammals), Asan city, Chungcheongnam-do (3,358 mites from 48 mammals), and Jangseong-gun, Jeollanam-do (3,169 for 62 mammals) from April-November 2009 in the Republic of Korea (= Korea) and were identified to species. Leptotrombidium pallidum was the predominant species in Hwaseong (95.8%) and Asan (61.2%), while Leptotrombidium scutellare was the predominant species collected from Jangseong (80.1%). Overall, larval chigger mite indices decreased from April (27.3) to June (4.9), then increased in September (95.2) and to a high level in November (169.3). These data suggest that L. pallidum and L. scutellare are the primary vectors of scrub typhus throughout their range in Korea. While other species of larval chigger mites were also collected with some implications in the transmission of Orientia tsutsugamushi, they only accounted for 11.2% of all larval chigger mites collected from small mammals. PMID:24850971

  3. Role of mites and thrips in the agrobiocoenosis of the soybean.

    PubMed

    Abrahám, R; Kuroli, G

    2003-01-01

    Soy beans dangerous pests are mites and thrips, that is why the present paper aims at the examination of the changes in their numbers and dominance relations of some varieties of different maturity groups. The small plot experiments were conducted in Kisalföld region with the following soybean varieties: early ripening Bólyi 38, Evans, McCall, middle ripening Bólyi 45 and late ripening Eszter, Zsuzsanna and Borza, in Mosonmagyaróvár. Mites and thrips were collected every week with Berlese-extractor. It was observed that Tetranychus urticae Koch, the dominant mite species on soybean, developed its peak-numbers at the end of August. The number of mites was 20 % higher on the late ripening varieties, than on the early ripening ones. Predatory mites (Typhlodromus pyri Scheuten, Amblyseius andersoni Chant) and thrips (Scolothrips longicornis Priesner, Aeolothrips intermedius Bagnall) could not reduce the number of Tetranychus urticae due to their low density. Among the thrips Thrips tabaci Lindeman was the main pest of the soybean leaves, but Frankliniella intonsa Trybom was dominant in the flowers. The blooming of the soybean primarily influences the dynamics of phytophagous thrips. The peak-number of pests reached the highest rate a week later and more thrips were counted on the late varieties as well. Early ripening soybean varieties are recommended to be grown in the Kisalföld region since they are less affected by mites and thrips. PMID:15149112

  4. DIVERSITY OF FEATHER MITES (ACARI: ASTIGMATA) ON DARWIN’S FINCHES

    PubMed Central

    Villa, Scott M.; Le Bohec, Céline; Koop, Jennifer A. H.; Proctor, Heather C.; Clayton, Dale H.

    2014-01-01

    Feather mites are a diverse group of ectosymbionts that occur on most species of birds. Although Darwin’s finches are a well-studied group of birds, relatively little is known about their feather mites. Nearly 200 birds across 9 finch species, and from 2 locations on Santa Cruz Island, Galápagos, were dust-ruffled during the 2009 breeding season. We found 8 genera of feather mites; the most prevalent genus was Mesalgoides (53–55%), followed by Trouessartia (40–45%), Amerodectes and Proctophyllodes (26–33%), Xolalgoides (21–27%), Analges and Strelkoviacarus (0–6%), and Dermoglyphus (2–4%). There was no evidence for microclimatic effects (ambient temperature and relative humidity) on mite diversity. Host body mass was significantly correlated with mean feather mite abundance across 7 of 8 well-sampled species of finches. Certhidea olivacea, the smallest species, did not fit this pattern and had a disproportionately high number of mites for its body mass. PMID:23691947

  5. Water Mites (Acari: Hydrachnida) of Ozark Streams - Abundance, Species Richness, and Potential as Environmental Indicators

    NASA Astrophysics Data System (ADS)

    Radwell, A. J.; Brown, A. V.

    2005-05-01

    Because water mites are tightly linked to other stream metazoans through parasitism and predation, they are potentially effective indicators of environmental quality. Meiofauna (80 ?m to 1 mm) were sampled from headwater riffles of 11 Ozark streams to determine relative abundance and densities of major meiofauna taxa. Water mites comprised 15.3% of the organisms collected exceeded only by chironomids (50.2%) and oligochaetes (17.8%), and mean water mite density among the 11 streams was 265 organisms per liter. The two streams that differed the most in environmental quality were sampled using techniques suitable for identification of species. An estimated 32 species from 20 genera and 13 families were found in the least disturbed stream; an estimated 19 species from 13 genera and 8 families were found in the most disturbed stream. This preliminary finding supports the notion that water mite species richness declines in response to environmental disturbance. Many species could only be identified as morphospecies of particular genera, but the ongoing taxonomic revision of Hydrachnida is expected to provide needed information. A collaborative effort between those interested in taxonomy/systematics of water mites and ecologists interested in the significance of water mites in aquatic communities could prove mutually beneficial.

  6. Recent cases of invasive alien mites and ticks in Japan: why is a regulatory framework needed?

    PubMed

    Goka, Koichi; Okabe, Kimiko; Takano, Ai

    2013-02-01

    Japan's economy depends on the importation of natural resources, and as a result, Japan is subjected to a high risk of biological invasion. Although Japan has quarantine systems to protect ecosystems, agriculture, forestry, fisheries, and human health against alien species, economic globalization has resulted in an ever-increasing risk of invasion. Mite invasion is no exception. Alien species that impact natural ecosystems are regulated in Japan by the Invasive Alien Species Act. However, the law focuses only on visibly recognizable species, so that species too small to see, such as viruses, bacteria, fungi, and mites, are beyond the scope of this law. The Plant Protection Law has limited the introduction of alien pests, including mites, that are harmful to agricultural crops. Recently, the liberalization of global trade policies have increased pressure to loosen regulations on various pests, including spider mites. Infectious diseases and their causative species are quarantined under the Rabies Prevention Law, the Domestic Animal Infectious Diseases Control Law, and the Human Infectious Diseases Control Law, but these laws do not cover wildlife diseases. The most serious problem is that wild reptiles, which can be carriers of ticks and tick-borne diseases, can be freely introduced to Japan. These loopholes in Japan's regulatory system have resulted in mite and tick invasions, which affect not only wildlife communities and human society but also endemism and biological diversity of natural mite populations. PMID:23001476

  7. Larval chigger mites collected from small mammals in 3 provinces, Korea.

    PubMed

    Lee, In-Yong; Song, Hyeon-Je; Choi, Yeon-Joo; Shin, Sun-Hye; Choi, Min-Kyung; Kwon, So-Hyun; Shin, E-Hyun; Park, Chan; Kim, Heung-Chul; Klein, Terry A; Park, Kyung-Hee; Jang, Won-Jong

    2014-04-01

    A total of 9,281 larval chigger mites were collected from small mammals captured at Hwaseong-gun, Gyeonggi-do (Province) (2,754 mites from 30 small mammals), Asan city, Chungcheongnam-do (3,358 mites from 48 mammals), and Jangseong-gun, Jeollanam-do (3,169 for 62 mammals) from April-November 2009 in the Republic of Korea (= Korea) and were identified to species. Leptotrombidium pallidum was the predominant species in Hwaseong (95.8%) and Asan (61.2%), while Leptotrombidium scutellare was the predominant species collected from Jangseong (80.1%). Overall, larval chigger mite indices decreased from April (27.3) to June (4.9), then increased in September (95.2) and to a high level in November (169.3). These data suggest that L. pallidum and L. scutellare are the primary vectors of scrub typhus throughout their range in Korea. While other species of larval chigger mites were also collected with some implications in the transmission of Orientia tsutsugamushi, they only accounted for 11.2% of all larval chigger mites collected from small mammals. PMID:24850971

  8. Conjunctivitis induced by a red bodied mite, Neotrombicula autumnalis

    PubMed Central

    Parcell, Benjamin J.; Sharpe, Graeme; Jones, Brian; Alexander, Claire L.

    2013-01-01

    This is a description of an unusual case of conjunctivitis caused by a trombiculid red mite, Neotrombicula autumnalis. The patient’s condition improved only after its removal and with application of carbomer gel eye drops. There have been reports of increasing numbers of severe cases of trombiculosis over the last 15 years particularly in Germany and a number of cases have also been reported in the United Kingdom. Cases where trombiculid larvae feed on any region of the head or face of humans are unknown. In addition it is most likely the patient acquired the infection from her pet cat and this is the first description of acquisition from this animal. PMID:23823162

  9. Nine eriophyoid mite species from Iran (Acari, Eriophyidae)

    PubMed Central

    Xue, Xiao-Feng; Sadeghi, Hussein; Hong, Xiao-Yue; Sinaie, Samira

    2011-01-01

    Abstract Nine eriophyoid mites, including two new species and five new records, from Iran are described and illustrated. They are Aceria acroptiloni Shevchenko & Kacalev, 1974, rec. n. on Rhaponticum repens (L.) Hidalgo (Asteraceae); Aceria anthocoptes (Nalepa, 1892), rec. n. on Cirsium arvense (L.) Scop. (Asteraceae); Aceria lactucae (Canestrini, 1893), rec. n. on Lactuca virosa L. (Asteraceae); Aceria pulicaris sp. n. on Pulicaria gnaphalodes (Vent.) Boiss. (Asteraceae); Aceria tosichella Keifer, 1969 on Setaria viridis (L.) Beauv. (Poaceae); Eriophyes rotundae Mohanasundaram, 1983 on Cyperus rotundus L. (Cyperaceae); Aculops maroccensis Keifer, 1972, rec. n. on Mentha piperita L. (Lamiaceae); Aculus medicager sp. n. on Medicago sativa L. (Leguminosae); Tetra lycopersici Xue & Hong, 2005, rec. n. on Solanum nigrum L. (Solanaceae). PMID:22144865

  10. Nine eriophyoid mite species from Iran (Acari, Eriophyidae).

    PubMed

    Xue, Xiao-Feng; Sadeghi, Hussein; Hong, Xiao-Yue; Sinaie, Samira

    2011-01-01

    Nine eriophyoid mites, including two new species and five new records, from Iran are described and illustrated. They are Aceria acroptiloni Shevchenko & Kacalev, 1974, rec. n. on Rhaponticum repens (L.) Hidalgo (Asteraceae); Aceria anthocoptes (Nalepa, 1892), rec. n. on Cirsium arvense (L.) Scop. (Asteraceae); Aceria lactucae (Canestrini, 1893), rec. n. on Lactuca virosa L. (Asteraceae); Aceria pulicarissp. n. on Pulicaria gnaphalodes (Vent.) Boiss. (Asteraceae); Aceria tosichella Keifer, 1969 on Setaria viridis (L.) Beauv. (Poaceae); Eriophyes rotundae Mohanasundaram, 1983 on Cyperus rotundus L. (Cyperaceae); Aculops maroccensis Keifer, 1972, rec. n. on Mentha piperita L. (Lamiaceae); Aculus medicagersp. n. on Medicago sativa L. (Leguminosae); Tetra lycopersici Xue & Hong, 2005, rec. n. on Solanum nigrum L. (Solanaceae). PMID:22144865

  11. Raphides in Palm Embryos and their Systematic Distribution

    PubMed Central

    ZONA, SCOTT

    2004-01-01

    • Background and Aims Raphides are ubiquitous in the palms (Arecaceae), where they are found in roots, stems, leaves, flowers and fruits. Their occasional presence in embryos, first noticed over 100 years ago, has gone largely unexamined. • Methods Embryos from 148 taxa of palms, the largest survey of palm embryos to date, were examined using light microscopy of squashed preparations under non?polarized and crossed polarized light. • Key Results Raphides were found in embryos of species from the three subfamilies Coryphoideae, Ceroxyloideae and Arecoideae. Raphides were not observed in the embryos of species of Calamoideae or Phytelephantoideae. The remaining subfamily, the monospecific Nypoideae, was not available for study. • Conclusions Within the Coryphoideae and Ceroxyloideae, embryos with raphides were rare, but within the Arecoideae, they were a common feature of the tribes Areceae and Caryoteae. PMID:14980977

  12. Image Segmentation of Historical Handwriting from Palm Leaf Manuscripts

    NASA Astrophysics Data System (ADS)

    Surinta, Olarik; Chamchong, Rapeeporn

    Palm leaf manuscripts were one of the earliest forms of written media and were used in Southeast Asia to store early written knowledge about subjects such as medicine, Buddhist doctrine and astrology. Therefore, historical handwritten palm leaf manuscripts are important for people who like to learn about historical documents, because we can learn more experience from them. This paper presents an image segmentation of historical handwriting from palm leaf manuscripts. The process is composed of three steps: 1) background elimination to separate text and background by Otsu's algorithm 2) line segmentation and 3) character segmentation by histogram of image. The end result is the character's image. The results from this research may be applied to optical character recognition (OCR) in the future.

  13. Genome sequence of the date palm Phoenix dactylifera L

    PubMed Central

    Al-Mssallem, Ibrahim S.; Hu, Songnian; Zhang, Xiaowei; Lin, Qiang; Liu, Wanfei; Tan, Jun; Yu, Xiaoguang; Liu, Jiucheng; Pan, Linlin; Zhang, Tongwu; Yin, Yuxin; Xin, Chengqi; Wu, Hao; Zhang, Guangyu; Ba Abdullah, Mohammed M.; Huang, Dawei; Fang, Yongjun; Alnakhli, Yasser O.; Jia, Shangang; Yin, An; Alhuzimi, Eman M.; Alsaihati, Burair A.; Al-Owayyed, Saad A.; Zhao, Duojun; Zhang, Sun; Al-Otaibi, Noha A.; Sun, Gaoyuan; Majrashi, Majed A.; Li, Fusen; Tala; Wang, Jixiang; Yun, Quanzheng; Alnassar, Nafla A.; Wang, Lei; Yang, Meng; Al-Jelaify, Rasha F.; Liu, Kan; Gao, Shenghan; Chen, Kaifu; Alkhaldi, Samiyah R.; Liu, Guiming; Zhang, Meng; Guo, Haiyan; Yu, Jun

    2013-01-01

    Date palm (Phoenix dactylifera L.) is a cultivated woody plant species with agricultural and economic importance. Here we report a genome assembly for an elite variety (Khalas), which is 605.4?Mb in size and covers >90% of the genome (~671?Mb) and >96% of its genes (~41,660 genes). Genomic sequence analysis demonstrates that P. dactylifera experienced a clear genome-wide duplication after either ancient whole genome duplications or massive segmental duplications. Genetic diversity analysis indicates that its stress resistance and sugar metabolism-related genes tend to be enriched in the chromosomal regions where the density of single-nucleotide polymorphisms is relatively low. Using transcriptomic data, we also illustrate the date palm’s unique sugar metabolism that underlies fruit development and ripening. Our large-scale genomic and transcriptomic data pave the way for further genomic studies not only on P. dactylifera but also other Arecaceae plants. PMID:23917264

  14. Enhanced expression of B7.2 (CD86) by percutaneous sensitization with house dust mite antigen

    Microsoft Academic Search

    Kazuki Santa; Kenji Watanabe; Tsutomu Nakada; Hiroyuki Kato; Sonoko Habu; Shunichiro Kubota

    2003-01-01

    House dust mite antigen is a well-known allergen in the pathogenesis of atopic dermatitis (AD), a chronic relapsing inflammatory skin disease. We evaluated the AD model mice sensitized with house dust mite antigen and observed a Th2-dominant immune response. In this experiment, BALB\\/c mice were sensitized percutaneously with house dust mite antigen three times with 7 days interval after skin

  15. Demodex mite infestation of unknown significance in a patient with rhinocerebral mucormycosis due to Apophysomyces elegans species complex.

    PubMed

    Hallur, Vinaykumar; Singh, Gagandeep; Rudramurthy, Shivaprakash M; Kapoor, Rakesh; Chakrabarti, Arunaloke

    2013-06-01

    Demodex mites have been reported in the past as a cause of facial rash in immunosuppressed patients. Here, we report an interesting case of possible demodicosis associated with rhinocerebral mucormycosis. The association of mites with a fungus was detected on direct microscopic examination of the scrapings of a nasal ulcer. The mite and the fungus were identified as Demodex folliculorum and Apophysomyces elegans species complex, respectively. PMID:23475907

  16. Biological Control Of Polyphagotarsonemus latus (Acarina: Tarsonemidae ) in greenhouses and field trials using introductions of predacious mites (Acarina: Tphytoseiidae )

    Microsoft Academic Search

    J. E. Peńa; L. Osborne

    1996-01-01

    Effect of prédation of 2 phytoseiid species on the broad mitePolyphagotarsonemus lotus (Banks) was studied on bean and lime plants in the greenhouse and in the field in lime.Neoseiulus californicus (McGregor) maintained mite density at low levels, whereas the effect ofNeoseiulus barken (Hughes) was erratic.N. californicus, together with a complex of indigenous predacious mites, keptP. latus density below economic damaging

  17. Importance of ambient saturation deficits in an epizootic of the fungus Neozygites floridana in cassava green mites ( Mononychellus tanajoa )

    Microsoft Academic Search

    Sam L. Elliot; Gilberto J. De Moraes; John D. Mumford

    2002-01-01

    The mite-pathogenic fungus Neozygites floridana Fisher (Entomophthorales: Neozygitaceae) is considered to have potential for the biological control of the cassava green\\u000a mite, Mononychellus tanajoa (Bondar). However, its activity is sporadic and laboratory data suggest a strong dependence on night-time saturation deficits\\u000a for transmission. We report on an epizootic of this fungus in a mite population in northeastern Brazil. During the

  18. Experimental study on possible transmission of the bacterium Erysipelothrix rhusiopathiae to chickens by the poultry red mite, Dermanyssus gallinae

    Microsoft Academic Search

    Sara Brännström; Ingrid Hansson; Jan Chirico

    2010-01-01

    The vector potential of the poultry red mite, Dermanyssus gallinae De Geer (Acari: Dermanyssidae), in relation to chicken erysipelas was investigated under experimental conditions. Chickens\\u000a were inoculated intramuscularly with the bacterium Erysipelothrix rhusiopathiae, and mites were allowed to feed on the inoculated chickens for 5 days. After 20 days of starvation, the mites were allowed\\u000a to feed on healthy chickens to enable

  19. Palm-Vein Classification Based on Principal Orientation Features

    PubMed Central

    Zhou, Yujia; Liu, Yaqin; Feng, Qianjin; Yang, Feng; Huang, Jing; Nie, Yixiao

    2014-01-01

    Personal recognition using palm–vein patterns has emerged as a promising alternative for human recognition because of its uniqueness, stability, live body identification, flexibility, and difficulty to cheat. With the expanding application of palm–vein pattern recognition, the corresponding growth of the database has resulted in a long response time. To shorten the response time of identification, this paper proposes a simple and useful classification for palm–vein identification based on principal direction features. In the registration process, the Gaussian-Radon transform is adopted to extract the orientation matrix and then compute the principal direction of a palm–vein image based on the orientation matrix. The database can be classified into six bins based on the value of the principal direction. In the identification process, the principal direction of the test sample is first extracted to ascertain the corresponding bin. One-by-one matching with the training samples is then performed in the bin. To improve recognition efficiency while maintaining better recognition accuracy, two neighborhood bins of the corresponding bin are continuously searched to identify the input palm–vein image. Evaluation experiments are conducted on three different databases, namely, PolyU, CASIA, and the database of this study. Experimental results show that the searching range of one test sample in PolyU, CASIA and our database by the proposed method for palm–vein identification can be reduced to 14.29%, 14.50%, and 14.28%, with retrieval accuracy of 96.67%, 96.00%, and 97.71%, respectively. With 10,000 training samples in the database, the execution time of the identification process by the traditional method is 18.56 s, while that by the proposed approach is 3.16 s. The experimental results confirm that the proposed approach is more efficient than the traditional method, especially for a large database. PMID:25383715

  20. An oribatid mite (Arachnida: Acari) from the Oxford Clay (Jurassic: Upper Callovian) of South Cave Station Quarry, Yorkshire, UK

    E-print Network

    Selden, Paul A.; Baker, Anne S.; Phipps, Kenneth J.

    2008-01-01

    ., GOTOH, K., SASAKI , T. and HIJ I I , N. 2005. Wind-based dispersal of oribatid mites (Acari: Oribat- ida) in a subtropical forest in Japan. Journal of the Acarological Society of Japan, 14, 117–122. KEEPING, W. and MIDDLEMISS , C. S. 1883. On some new... Book Stores, Corvallis, vii + 509 pp. SELDEN ET AL . : JURASSIC ORIBATID MITE FROM YORKSHIRE 631 KRIVOLUTSKY, D. A. and DRUK, A. Y. 1986. Fossil oriba- tid mites. Annual Review of Entomology, 31, 533–545. —— and KRASSILOV, V. A. 1977. Oribatid mites...

  1. Diapause incidence in the two-spotted spider mite increases due to predator presence, not due to selective predation.

    PubMed

    Kroon, Annemarie; Veenendaal, René L; Egas, Martijn; Bruin, Jan; Sabelis, Maurice W

    2005-01-01

    We recently reported evidence for increased diapause incidence in the spider mite Tetranychus urticae in presence of the predatory mite Typhlodromus pyri. This effect may arise from (1) selective predation on non-diapause spider mites, (2) predator-induced diapause in spider mites, or (3) both. Using a different strain of T. urticae, we first recovered increased diapause incidence in association with predators. Then, we tested for selective feeding in two-choice experiments with equal numbers of non-diapause and diapause spider mites. We found that the predatory mite had a significant preference for the latter. This indicates that increased diapause incidence in association with predatory mites is not due to selective predation. Therefore, predator-mediated physiological induction of diapause seems a more likely explanation. The cues leading to induction appear to relate to the predators, not their effects, since predation simulated by spider-mite removal or puncturing did not significantly affect diapause incidence. Why spider mites benefit from this response, remains an open question. PMID:15777002

  2. Electrostatic charge characteristics of Der p1 allergen-carrying particles and the house dust mite dermatophagoides pteronyssinus.

    PubMed

    Gaynor, P T; Hughes, J F

    1998-05-01

    Control of the house dust mite allergen has received considerable attention owing to its importance in some allergic diseases. One aspect of dust mites and their allergen-carrying faecal particles that has not been reported on, which may have allergen control applications, is the electrostatic charge they carry in the natural environment. To promote tribo-electric charging, household dust containing dust mite allergen and live house dust mites are separately agitated while in contact with either polypropylene, nylon or earthed metal. The charged dust and mites are subsequently subjected to electrostatic separation and collection. Results for concentrations of the house dust mite allergen, Der p1, indicate that, when subjected to nylon, Der p1 carrier particles appear to be predominantly positively charged. Similarly, when subjected to polypropylene, Der p1 carrier particles also appear to be positively charged. Reduction of excess free charge by agitation against earthed metal does not appear to affect the observed charging characteristics, indicating that the positive charge may be bound or inherent in the Der p1 carrier particles. In contrast, house dust mites exposed to nylon appear to be generally charging negative, whereas mites exposed to polypropylene appear to be charging positive. The observed electrostatic characteristics of the mites and Der p1 carrying particles will be useful in the future development of electrostatic allergen control methods. PMID:9747576

  3. Longevity and Developmental Stability in the Dung Fly Sepsis cynipsea, as Affected by the Ectoparasitic Mite, Pediculoides mesembrinae

    PubMed Central

    Martin, Oliver Y.; Hosken, David J.

    2009-01-01

    Fluctuating asymmetry (FA) is a widely employed measure of developmental stability. It has been found to increase with many stressors including parasite infection. Associations between parasites and FA may exist for several reasons in addition to parasites being the direct cause of increased FA. Developmentally stable individuals may have superior immune systems, and be less susceptible to parasite infection, and/or may be less exposed to parasites than developmentally unstable ones. Mites negatively impact host fitness in a number of insects, and if FA is a reflection of general genetic quality, as has been proposed, associations between mite number and FA are predicted. Potential relationships were investigated between an ectoparasitic mite, Pediculoides mesembrinae (Canestrini) (Phthiraptera: Menoponidae) and FA in the common dung fly Sepsis cynipsea (L.) (Diptera: Sepsidae). While it was found that mite infested flies died much faster than flies without mites, indicating that mites indeed stress their hosts, counter to expectations, no associations between mites and FA were found in any analyses. Additionally, FA in mite-infected flies generally did not differ from previously published FA data from uninfected S. cynipsea. Nevertheless, parasitized males tended to be somewhat less asymmetrical than non-parasitized males, but based on our data, it does not appear that mite infestation is generally associated with developmental stability in S. cynipsea. PMID:20053121

  4. [Dynamics of infection of Fringilla coelebs chaffinch nestlings with feather mites (Acari: Analgoidea)].

    PubMed

    Mironov, S V; Malyshev, L L

    2002-01-01

    A process of infecting the chaffinch nestlings Fringilla coelebs with three analgoid feather mites, Analges passerinus L., 1758, Monojoubertia microphylla (Robin, 1877), and Pteronyssoides striatus (Robin, 1977), commonly occurred on this bird species was investigated. 15 nests contained totally 65 nestlings, from 2 to 6 individuals in a brood, have been examined from the day of hatching till 11th day. Observations were held in the neighbourhood of the bird banding station "Rybachy" (Russia, Kaliningrad Province) in June of 1982. Number of mites on alive nestlings taken temporarily from their nest was counted by means of binocular lens under the magnification x12.5 and x25. The nestlings receive the mites from the chaffinch female during the night time, when the female sits together with the young birds and heats them. In the condition of this prolonged direct contact the mites migrate from the female onto the nestlings. As it was shown in our study of seasonal dynamics of mites on the chaffinch (Mironov, 2000), the chaffinch female only gives its mites to young generation and looses about three quarter of its mite micropopulation during the nesting period (June), hile in the chaffinch males the number of mites continues to increase during all summer. The infections with three feather mite species happen in the second part of the nestling's stay in the nest. The starting time of this process, its intensity, and sex and age structure of mite micropopulations on the nestlings just before their leaving the nest are different in the mite species examined. These peculiarities of feather mite species are determined by the biology of examined species, and first of all by their morphological characteristic and specialisation to different microhabitats, i.e. certain structural zones of plumage. Pteronyssoides striatus (Pteronyssidae) is rather typical mite specialised to feathers with vanes. In adult birds with completely developed plumage this species occupies the ventral surface of the big upper coverts of primary flight feathers. This species appears on the chaffinch nestlings in a significant number on 7th day. The mites occupy the basal parts of primary flight feathers represented in that moment by the rods only. They sit on practically open and smooth surface of this microhabitat, which is uncommon for them, because the vanes of the big upper coverts are not yet open and also represented by thin rods. During the period of the last 5 days (from 7 to 11th day) the mean number of mites per one nestling increases from 2.3 +/- 0.5 to 17.1 +/- 1.8 mites. Just before the day, when the nestling leave the nest, the tritonymphs absolutely predominate (82.4%) in the micropopulation of P. striatus. Analges passerinus (Analgidae) is specialised to live in the friable layer formed by numerous not-engaged thread barbles of the down feathers and basal parts of the body covert feathers. Mites have special hooks on legs used for hard attaching to the barbles and for fast moving in the friable layer of feathers. On the chaffinch nestlings, these mites appear usually on 8th day, when the rod-like body covert feathers begin to open on apices and form short brushes; however some individuals occur on the skin of nestlings even on 6th day. The mean number of mites per nestling on the 11th day reaches 16.5 +/- 1.4 individuals. The micropopulation of A. passerinus is represented on the nestlings mainly by the females (45.5%), tritonymphs (23.6%) and males (11.5%). Monojobertia microphylla (Proctophyllodidae) is a typical dweller of feathers with large vanes. Mites of this species commonly occupy the ventral surface of primary and secondary flight feathers and also respective big upper covert feathers of wings. M. microphylla appears on the nestlings in a significant number (7.1 +/- 1.2 mites) on 9th day, only when the primary flight feathers already have short vanes about 10 mm in length. In next three days the number of mites increases very fast and reaches on 11th day 60.3 +/- 5.7 mites per nestling. In the micropopulation of this specie

  5. A report on biocompounds from palm fossil of India

    PubMed Central

    Sharma, Dinesh Chandra; Khan, Mohd Sajid; Khan, M Salman; Srivastava, Rashmi; Srivastava, Ashwini Kumar; Shukla, Ritu

    2014-01-01

    The occurrence of a large number of fossil woods having resemblance in anatomical features with the modern palm genus, Phoenix L in Deccan Intertrappean fossil flora of Maastrichtian-Danian age (i. e. Late Cretaceous and Earliest Tertiary (65-67 my)) indicates the most primitive record of date palm. Present discovery of biocompounds from fossil wood of Phoenix collected from Deccan Intertrappean having affinity with the biocompounds known from modern plant further exemplify the earliest documentation of Phoenix in Indian peninsula. PMID:24966541

  6. Gender Classification Based on Geometry Features of Palm Image

    PubMed Central

    Wu, Ming; Yuan, Yubo

    2014-01-01

    This paper presents a novel gender classification method based on geometry features of palm image which is simple, fast, and easy to handle. This gender classification method based on geometry features comprises two main attributes. The first one is feature extraction by image processing. The other one is classification system with polynomial smooth support vector machine (PSSVM). A total of 180 palm images were collected from 30 persons to verify the validity of the proposed gender classification approach and the results are satisfactory with classification rate over 85%. Experimental results demonstrate that our proposed approach is feasible and effective in gender recognition. PMID:24892081

  7. Pilot application of PalmGHG, the RSPO greenhouse gas calculator for oil palm products , Chase L.D.C.b

    E-print Network

    Paris-Sud XI, Université de

    /t crude palm oil (CPO), with a range of -0.02 to +8.32t CO2e/t CPO. Previous land use and the area of peat1 Pilot application of PalmGHG, the RSPO greenhouse gas calculator for oil palm products Bessou C, Unilever R&D, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK f Indonesian Soil Research

  8. Aerobic treatment of palm oil mill effluent.

    PubMed

    Vijayaraghavan, K; Ahmad, Desa; Ezani Bin Abdul Aziz, Mohd

    2007-01-01

    In this study treatment of palm oil mill effluent (POME) was investigated using aerobic oxidation based on an activated sludge process. The effects of sludge volume index, scum index and mixed liquor suspended solids during the acclimatizing phase and biomass build-up phase were investigated in order to ascertain the reactor stability. The efficiency of the activated sludge process was evaluated by treating anaerobically digested and diluted raw POME obtained from Golden Hope Plantations, Malaysia. The treatment of POME was carried out at a fixed biomass concentration of 3900+/-200mg/L, whereas the corresponding sludge volume index was found to be around 105+/-5mL/g. The initial studies on the efficiency of the activated sludge reactor were carried out using diluted raw POME for varying the hydraulic retention time, viz: 18, 24, 30 and 36h and influent COD concentration, viz: 1000, 2000, 3000, 4000 and 5000mg/L, respectively. The results showed that at the end of 36h of hydraulic retention time for the above said influent COD, the COD removal efficiencies were found to be 83%, 72%, 64%, 54% and 42% whereas at 24h hydraulic retention time they were 57%, 45%, 38%, 30% and 27%, respectively. The effectiveness of aerobic oxidation was also compared between anaerobically digested and diluted raw POME having corresponding CODs of 3908 and 3925mg/L, for varying hydraulic retention time, viz: 18, 24, 30, 36, 42, 48, 54 and 60h. The dissolved oxygen concentration and pH in the activated sludge reactor were found to be 1.8-2.2mg/L and 7-8.5, respectively. The scum index was found to rise from 0.5% to 1.9% during the acclimatizing phase and biomass build-up phase. PMID:16584834

  9. Ritual uses of palms in traditional medicine in sub-Saharan Africa: a review

    PubMed Central

    2014-01-01

    Palms (Arecaceae) are prominent elements in African traditional medicines. It is, however, a challenge to find detailed information on the ritual use of palms, which are an inextricable part of African medicinal and spiritual systems. This work reviews ritual uses of palms within African ethnomedicine. We studied over 200 publications on uses of African palms and found information about ritual uses in 26 of them. At least 12 palm species in sub-Saharan Africa are involved in various ritual practices: Borassus aethiopum, Cocos nucifera, Dypsis canaliculata, D. fibrosa, D. pinnatifrons, Elaeis guineensis, Hyphaene coriacea, H. petersiana, Phoenix reclinata, Raphia farinifera, R. hookeri, and R. vinifera. In some rituals, palms play a central role as sacred objects, for example the seeds accompany oracles and palm leaves are used in offerings. In other cases, palms are added as a support to other powerful ingredients, for example palm oil used as a medium to blend and make coherent the healing mixture. A better understanding of the cultural context of medicinal use of palms is needed in order to obtain a more accurate and complete insight into palm-based traditional medicines. PMID:25056559

  10. Palm-based standard reference materials for iodine value and slip melting point.

    PubMed

    Tarmizi, Azmil Haizam Ahmad; Lin, Siew Wai; Kuntom, Ainie

    2008-01-01

    This work described study protocols on the production of Palm-Based Standard Reference Materials for iodine value and slip melting point. Thirty-three laboratories collaborated in the inter-laboratory proficiency tests for characterization of iodine value, while thirty-two laboratories for characterization of slip melting point. The iodine value and slip melting point of palm oil, palm olein and palm stearin were determined in accordance to MPOB Test Methods p3.2:2004 and p4.2:2004, respectively. The consensus values and their uncertainties were based on the acceptability of statistical agreement of results obtained from collaborating laboratories. The consensus values and uncertainties for iodine values were 52.63 +/- 0.14 Wijs in palm oil, 56.77 +/- 0.12 Wijs in palm olein and 33.76 +/- 0.18 Wijs in palm stearin. For the slip melting points, the consensus values and uncertainties were 35.6 +/- 0.3 degrees C in palm oil, 22.7 +/- 0.4 degrees C in palm olein and 53.4 +/- 0.2 degrees C in palm stearin. Repeatability and reproducibility relative standard deviations were found to be good and acceptable, with values much lower than that of 10%. Stability of Palm-Based Standard Reference Materials remained stable at temperatures of -20 degrees C, 0 degrees C, 6 degrees C and 24 degrees C upon storage for one year. PMID:19609396

  11. Effectiveness of eriophyid mites for biological control of weedy plants and challenges for future research.

    PubMed

    Smith, L; de Lillo, E; Amrine, J W

    2010-07-01

    Eriophyid mites have been considered to have a high potential for use as classical biological control agents of weeds. We reviewed known examples of the use of eriophyid mites to control weedy plants to learn how effective they have been. In the past 13 years, since Rosenthal's 1996 review, 13 species have undergone some degree of pre-release evaluation (Aceria genistae, A. lantanae, Aceria sp. [boneseed leaf buckle mite (BLBM)], A. salsolae, A. sobhiani, A. solstitialis, A. tamaricis, A. thalgi, A. thessalonicae, Cecidophyes rouhollahi, Floracarus perrepae, Leipothrix dipsacivagus and L. knautiae), but only four (A. genistae, Aceria sp. [BLBM], C. rouhollahi and F. perrepae) have been authorized for introduction. Prior to this, three species (Aceria chondrillae, A. malherbae and Aculus hyperici) were introduced and have become established. Although these three species impact the fitness of their host plant, it is not clear how much they have contributed to reduction of the population of the target weed. In some cases, natural enemies, resistant plant genotypes, and adverse abiotic conditions have reduced the ability of eriophyid mites to control target weed populations. Some eriophyid mites that are highly coevolved with their host plant may be poor prospects for biological control because of host plant resistance or tolerance of the plant to the mite. Susceptibility of eriophyids to predators and pathogens may also prevent them from achieving population densities necessary to reduce host plant populations. Short generation time, high intrinsic rate of increase and high mobility by aerial dispersal imply that eriophyids should have rapid rates of evolution. This raises concerns that eriophyids may be more likely to lose efficacy over time due to coevolution with the target weed or that they may be more likely to adapt to nontarget host plants compared to insects, which have a longer generation time and slower population growth rate. Critical areas for future research include life history, foraging and dispersal behavior, mechanisms controlling host plant specificity, and evolutionary stability of eriophyid mites. This knowledge is critical for designing and interpreting laboratory and field experiments to measure host plant specificity and potential impact on target and nontarget plants, which must be known before they can be approved for release. One of the more successful examples of an eriophyid mite controlling an invasive alien weed is Phyllocoptes fructiphilus, whose impact is primarily due to transmission of a virus pathogenic to the target, Rosa multiflora. Neither the mite nor the virus originated from the target weed, which suggests that using "novel enemies" may sometimes be an effective strategy for using eriophyid mites. PMID:19760101

  12. Bacterial community composition of three candidate insect vectors of palm phytoplasma (Texas Phoenix Palm Decline and Lethal Yellowing).

    PubMed

    Powell, Christopher M; Hail, Daymon; Potocnjak, Julia; Hanson, J Delton; Halbert, Susan H; Bextine, Blake R

    2015-02-01

    Texas Phoenix Palm Decline (TPPD) and Lethal Yellowing are two phytoplasma-linked diseases in palms. The phytoplasma causing TPPD is thought to be transmitted by three putative planthopper vectors, Ormenaria rufifascia, Omolicna joi, and Haplaxius crudus. These insects have been morphologically and molecularly described, and have screened positive for Candidatus Phytoplasma palmae. Individuals from each species were subjected to 16S bacterial community sequencing using the Roche 454 platform, providing new information regarding the previously unexplored bacterial communities present in putative vectors. PMID:25298076

  13. Utilization of crude and refined palm and palm kernel oils in broiler diets.

    PubMed

    Valencia, M E; Watkins, S E; Waldroup, A L; Waldroup, P W; Fletcher, D L

    1993-12-01

    Four experiments were conducted to evaluate the use of crude and refined palm (PAO) and palm kernel oil (PKO) in diets for broiler chickens. In Experiment 1, refined PAO and PKO were compared with corn oil (CO) and poultry oil (PO) at levels up to 10%. In Experiment 2, refined PAO and PKO were compared with PO at levels up to 8%. In Experiments 3 and 4, crude PAO and PKO were compared with PO at levels up to 8%. Diets were formulated based on the energy level assigned to PAO; other oils were added in amounts calculated to be isocaloric with an inert filler as required. Live production variables were measured. Samples of birds were processed to determine carcass characteristics, and fatty acid composition of adipose tissue was determined. In all studies, broilers fed crude or refined sources of PAO and PKO grew as well and utilized their feed as efficiently as those fed diets with isocaloric amounts of CO or PO. There were minimal interactions of source and dietary level of oil in any of the studies. Dressing percentage and quantity of abdominal fat were not influenced by source of supplemental oil; however, the fatty acid profile of adipose tissue was altered by the source of supplemental oil. There were only minor differences in fatty acid content of adipose tissue of broilers fed PAO (either crude or refined) versus those fed PO. However, increasing levels of PKO resulted in increased deposition of saturated fatty acids, especially lauric and myristic acid, and decreased concentrations of both monoenoic and polyunsaturated fatty acids. The resulting change in hardness of adipose tissue may prove to be advantageous in marketing. PMID:8309869

  14. Mar, a MITE family of hAT transposons in Drosophila

    PubMed Central

    2012-01-01

    Background Miniature inverted-repeat transposable elements (MITEs) are short, nonautonomous DNA elements flanked by subterminal or terminal inverted repeats (TIRs) with no coding capacity. MITEs were originally recognized as important components of plant genomes, where they can attain extremely high copy numbers, and are also found in several animal genomes, including mosquitoes, fish and humans. So far, few MITEs have been described in Drosophila. Results Herein we describe the distribution and evolution of Mar, a MITE family of hAT transposons, in Drosophilidae species. In silico searches and PCR screening showed that Mar distribution is restricted to the willistoni subgroup of the Drosophila species, and a phylogenetic analysis of Mar indicates that this element may have originated prior to the diversification of these species. Most of the Mar copies in D. willistoni present conserved target site duplications and TIRs, indicating recent mobilization of these sequences. We also identified relic copies of potentially full-length Mar transposon in D. tropicalis and D. willistoni. The phylogenetic relationship among transposases from the putative full-length Mar and other hAT superfamily elements revealed that Mar is placed into the recently determined Buster group of hAT transposons. Conclusion On the basis of the obtained data, we can suggest that the origin of these Mar MITEs occurred before the subgroup willistoni speciation, which started about 5.7 Mya. The Mar relic transposase existence indicates that these MITEs originated by internal deletions and suggests that the full-length transposon was recently functional in D. willistoni, promoting Mar MITEs mobilization. PMID:22935191

  15. P elements and MITE relatives in the whole genome sequence of Anopheles gambiae

    PubMed Central

    Quesneville, Hadi; Nouaud, Danielle; Anxolabéhčre, Dominique

    2006-01-01

    Background Miniature Inverted-repeat Terminal Elements (MITEs), which are particular class-II transposable elements (TEs), play an important role in genome evolution, because they have very high copy numbers and display recurrent bursts of transposition. The 5' and 3' subterminal regions of a given MITE family often show a high sequence similarity with the corresponding regions of an autonomous Class-II TE family. However, the sustained presence over a prolonged evolutionary time of MITEs and TE master copies able to promote their mobility has been rarely reported within the same genome, and this raises fascinating evolutionary questions. Results We report here the presence of P transposable elements with related MITE families in the Anopheles gambiae genome. Using a TE annotation pipeline we have identified and analyzed all the P sequences in the sequenced A. gambiae PEST strain genome. More than 0.49% of the genome consists of P elements and derivates. P elements can be divided into 9 different subfamilies, separated by more than 30% of nucleotide divergence. Seven of them present full length copies. Ten MITE families are associated with 6 out of the 9 Psubfamilies. Comparing their intra-element nucleotide diversities and their structures allows us to propose the putative dynamics of their emergence. In particular, one MITE family which has a hybrid structure, with ends each of which is related to a different P-subfamily, suggests a new mechanism for their emergence and their mobility. Conclusion This work contributes to a greater understanding of the relationship between full-length class-II TEs and MITEs, in this case P elements and their derivatives in the genome of A. gambiae. Moreover, it provides the most comprehensive catalogue to date of P-like transposons in this genome and provides convincing yet indirect evidence that some of the subfamilies have been recently active. PMID:16919158

  16. Effect of Stored Product Mite Extracts on Human Dermal Microvascular Endothelial Cells

    PubMed Central

    ELDER, B. LAUREL; MORGAN, MARJORIE S.; ARLIAN, LARRY G.

    2012-01-01

    Stored product mites commonly occur in agricultural work environments and sometimes in homes in significant numbers. They are a source of allergens that sensitize and induce allergic reactions. This may include atopic dermatitis. The purpose of this investigation was to determine if the common species of storage mites are the sources of molecules that influence the function of human dermal microvascular endothelial cells that regulate the trafficking of inflammatory and immune cells into the dermis during allergic reactions and other skin diseases. Human dermal microvascular endothelial cells were challenged with varying doses of extracts of the storage mites Acarus siro L., Chortoglyphus arcuatus (Troupeau), Lepidoglyphus destructor (Schrank), or Tyrophagus putrescentiae (Schrank) and the secretion of cytokines and expression of adhesion molecules were measured. The role of endotoxin and protein in inducing these responses was evaluated. These stored product mite extracts induced secretion of interleukin-6, interleukin-8, monocyte chemotactic protein-1, and granulocyte/monocyte colony stimulating factor. Some of these effects were induced by protein present in the extracts, some were induced by endotoxin, and some were induced by other substances. C. arcuatus and T. putrescentiae extracts also down-regulated tumor necrosis factor ?-induced vascular cell adhesion molecule-1 expression. Stored product mite extracts contain an assortment of molecules, including endotoxins and proteins, which modulate the expression of cell adhesion molecules and the secretion of cytokines by microvascular endothelial cells. These modulating properties varied among mite species indicating that each mite species has a unique set of molecules that is responsible for its activity. PMID:23270170

  17. Toxicity and repellency of hot pepper extracts to spider mite, Tetranychus urticae Koch.

    PubMed

    Antonious, George F; Meyer, Janet E; Snyder, John C

    2006-01-01

    Increasing concern about persistence and environmental impact of synthetic pesticide residues require development of biodegradable and environmentally safe alternatives. The potential of using fruit extracts of hot pepper as alternatives to synthetic acaricides for controlling the two-spotted spider mite, Tetranychus urticae Koch, is explored in this study. Twenty-four Capsicum accessions (Solanaceae) were screened for their toxicity and repellency to the spider mites. Crude extracts from fruits of C. chinense, C. frutescens, C. baccatum, C. annuum, and C. pubescens were prepared in methanol and tested for their acaricidal properties. Spider mite mortality was greatest (45%) when fruit extract of accession Grif-9169 (C. annuum) was used. Results from diving board bioassays indicated that mites avoided filter paper strips treated with hot pepper extracts from accessions PI-596057 (C. baccatum), PI-195299 (C. annuum), and Grif- 9270 (C. annuum). This investigation suggests that methanolic extracts of these three accessions may have a great potential for repelling spider mites and should be field-tested on a large-scale to assess their value in managing populations of spider mites, which could reduce reliance on synthetic acaricides. An attempt was made to correlate repellency with chemical constituents of fruit extracts of the most repellent accessions to identify chemical sources of repellency. Capsaicin and dihydrocapsaicin, the pungent components of pepper fruit, were not correlated with toxicity or repellency, indicating that these are not likely related to the toxicity or repellency of the pepper fruit extracts. Other, unidentified chemicals are likely responsible for toxicity and repellency to the two-spotted spider mite. PMID:17090499

  18. Recent developments in the use of acoustic sensors and signal processing tools to target early infestations of Red Palm Weevil in agricultural environments

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Much of the damage caused by red palm weevil larvae to date palms, ornamental palms, and palm offshoots could be mitigated by early detection and treatment of infestations. Acoustic technology has potential to enable early detection, but the short, high-frequency sound impulses produced by red palm ...

  19. Recent developments in the use of acoustic sensors and signal processing tools to target early infestations of red palm weevil (Coleopter: Curculionidae) in agricultural environments

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Much of the damage caused by red palm weevil larvae to date palms, ornamental palms, and palm offshoots could be mitigated by early detection and treatment of infestations. Acoustic technology has potential to enable early detection, but the short, high-frequency sound impulses produced by red palm ...

  20. Comparison of Parasitic Mites in Russian-Hybrid and Italian Honey Bee (Hymenoptera: Apidae) Colonies across Three Different Locations in North Carolina

    Microsoft Academic Search

    David R. Tarpy; Joshua Summers; Jennifer J. Keller

    2007-01-01

    The most economically important parasites of honey bee, Apis mellifera L. (Hyme- noptera: Apidae), colonies are the parasitic mitesVarroadestructor Anderson & Trueman andAcarapis woodi (Rennie). Research has shown that mite-tolerant stocks are effective means to reduce mite infestations within colonies, but it is unclear whether the stocks available commercially are viable means of mite control because they are likely to