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Showing 1 to 20 of 27 for “"Varroa"”.
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Essential oil treatments to control Varroa destructor Anderson and Trueman 2000 (formerly Varroa jacobsoni Oudemans 1904) (Mesostigmata: Varroidae)
Varroa destructor Anderson and Trueman is the most serious pest of the honey bee Apis mellifera L. Varroa mites transmit several viruses, bacteria and fungi to the bees, which results in a condition called parasitic mite syndrome. There are no completely reliable treatments available to control the …
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Toxicological Analysis of Acaricides for Varroa Mite Management
The varroa mite is a primary driver behind periodical losses of honey bee colonies. The mite requires bees for food and reproduction and, in turn, elicits physiological deficiencies and diseases that compromise bee colony health. The mite nervous system is a target site for existing acaricides. …
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The costs and benefits of resistance and tolerance behaviors against Varroa mite (Varroa destructor Anderson and Trueman) in honey bee (Apis mellifera L.)
… different levels of resistance and tolerance to varroa mites were assessed under a variety of treatment combinations to quantify effects of queen pheromone, acaricide treatment, wintering method, ventilation condition and pathogen infection on the costs and benefits associated with mite removal …
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Methods for controlling two European Honey bee (Apis mellifera L.) pests: Varroa mites (Varroa destructor, Anderson and Trueman) And Small hive beetles (Aethina tumida)
… colonies have been heavily damaged by invading Varroa mites (Varroa destructor), and, more recently, small hive beetles (Aethina tumida). These pests infest A. mellifera colonies throughout Virginia, with V. destructor feeding upon the lipids of their hosts and spreading viruses, and A. tumida …
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Naturally occurring resistance to Varroa destructor in the Western honey bee (Apis mellifera)
… these is the combination of the parasitic mite Varroa destructor and the virus it vectors, deformed wing virus (DWV) (Rosenkranz et al., 2010). Chemical control methods that have been developed are not only potentially harmful to the bees themselves but are also ultimately unsustainable …
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Investigating naturally evolved Varroa destructorresistance in Apis mellifera honey bees : hostbehavioural traits and parasite reproductivebiology
The ectoparasitic mite Varroa destructor remains a major threat to Apis mellifera honey bees amidst ongoing colony losses throughout the Northern Hemisphere. While the vast majority of colonies still require artificial treatments to control their mite populations, an increasing number are evolving …
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Mitocidal resistance in the ectoparasitic mite,Varroa destructor, and the relationship with its host Apis mellifera
… developed resistance to pyrethroid chemicals. Varroa are thought to have a negative impact in the overall health and vitality of the bee, transmitting viruses through haemolymph feeding and possibly weakening the immune response of the bee. Proteomic analysis was used to compare the proteomic …
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The role of resistance to varroa destructor and deformed wing virus in the European honey bee (apis mellifera)
… losses are attributed to the ectoparasitic mite Varroa destructor that acts as a vector of RNA viruses, most notably Deformed wing virus (DWV). Three master variants of the DWV have been discovered; Type-A, B, and C. The increase in overwinter colony losses are closely linked to DWV. At the same …
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Changes in Gene Expression and Viral Titer in Varroa Jacobsoni Mites After a Host Shift Asian to European Honey Bees
… species in beekeeping belong to the genus <em>Varroa</em> (<em> Varroa jacobsoni</em>and <em>Varroa destructor</em>). <em>Varroa</em> mite parasitism of honey bees is thought to be the most significant cause of colony mortality worldwide, and mite resistance to active ingredients of acaricides …
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Development of a Precision Mite Management Program for the Control of the Ectoparasite Varroa destructor in Hives of Apis mellifera L.
… in CCD is infestation by the ectoparasitic mite, Varroa destructor. Initial efforts to control the mite relied heavily on regular application of miticides without regard to actual mite infestation levels. This approach has led to problems of resistance in the mite and contamination of the hive and …
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The spread and evolution of RNA viruses among honey bees and the wider insect community with particular emphasis on deformed wing virus (DWV)
… association with its vector, the ectoparasitic Varroa destructor mite are now widely accepted as a major factor in these colony losses. This has had a devastating effect on beekeepers and farmers alike. It has become apparent that many of these viral pathogens are generalists, able to infect …
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The effects of urbanization on disease prevalence in managed honey bee hives in Hamilton County, TN
… intervals from 0.5-9.5 km radii from each hive. Varroa levels significantly decreased with increased urbanization. There was a weak negative correlation between Varroa load and the likelihood of surviving the study. There was a positive relationship between urbanization and small hive beetle …
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Potential for probiotics to mitigate environmental stress in Western honey bees
… key threats to Apis mellifera, such as Varroa mites and Paenibacillus larvae. Lactobacilli are part of the honey bee hindgut microbiota, and some probiotic strains have been shown to enhance host immunity and buffer against pathogens. In addition, certain Lactobacillus strains can …
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The effects of environmental factors on honey bee morbidity
… weather, which affect honey bee disease. I use varroa destructor mite and nosema parasite infection levels as measures of honey bee health. Varroa is an important measure of honey bee health because it has been linked to increased overwintering colony losses (USDA 2013). Nosema has also been …
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Polyadenylation of ribosomal RNA in response to picornavirus infection in honey bees (Apis mellifera)
… as well as their transmissibility through Varroa destructor, an ectoparasitic mite, can cause severe declines in honey bee populations. Polyadenylated (polyA) rRNA has been associated with honey bees infected with viruses in past studies. In bacteria, yeast, and some mammals, polyA rRNA …
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Impact of Temperature and Microbial Infection on the Honey Bee Hemocytes
… (22°C) and stressors like pathogens (Varroa destructor, bacteria) or pesticides impair hemocyte function. Using clodronate liposomes (CLD) to deplete hemocytes, we assessed how immune suppression interacts with these stressors.</p> <p>Methods</p> <p>Newly emerged (5-day-old) and older …
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The Effects of Pesticide Exposures on the Nutritional and Immune Health of the Honey Bee, Apis mellifera L.
… to consider alternative methods for control of varroa mites and the use of fungicides near their colonies.
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Applicability and limitations of transcriptomic pipelines in livestock species
… standard parameters. The trait of interest, Varroa Sensitive Hygiene, further expands this evaluation as it is presented here as a binary behavioral trait rather than a continuous trait like metabolic efficiency. In Chapter 2: Identification of Genomic Regions Affecting Varroa Sensitive …
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Field and laboratory evaluation of the interactions between pesticides and the gut microbiome in Honey Bees (Apis mellifera)
… a miticide commonly used to treat Varroa mite parasites). Similar to most organisms, the gut microbiome is important for bee health, metabolism, and behavior, however it is not well known how environmental factors like pesticides impact their gut bacterial symbionts. I hypothesized …
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