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Updated: May 13, 2026

Preparation of Virus-Enriched Inoculum for Oral Infection of Honey Bees (Apis mellifera)
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Published on: August 26, 2020

Varroa-virus interaction in collapsing honey bee colonies.

Roy M Francis1, Steen L Nielsen, Per Kryger

  • 1Department of Agroecology, Science and Technology, Aarhus University, Slagelse, Denmark. royfrancis.mathew@agrsci.dk

Plos One
|March 26, 2013
PubMed
Summary

Varroa mites and associated viruses like AKI and DWV significantly impact honey bee colony health. Successful mite reduction correlated with overwintering survival, highlighting integrated pest management for bee colony preservation.

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Area of Science:

  • Apiculture
  • Entomology
  • Veterinary Entomology

Background:

  • Honey bee colony losses are a major concern for global agriculture.
  • Varroa mites (Varroa destructor) and their associated viruses are primary drivers of colony collapse.

Purpose of the Study:

  • To investigate the seasonal dynamics of Varroa mite infestation and virus (Acute-Kashmir-Israeli complex and Deformed Wing Virus) prevalence in honey bee colonies.
  • To evaluate the efficacy of organic acids and pyrethroid treatments against Varroa mites and their impact on virus titres.

Main Methods:

  • Year-long monitoring of 23 honey bee colonies across three treatment groups: organic acids, pyrethroid, and untreated controls.
  • Monthly sampling of bees to quantify Varroa mite loads and analyze viral titres (AKI and DWV) using quantitative methods.
  • Assessment of colony overwintering success in relation to mite infestation and viral load.

Main Results:

  • Both organic acid and pyrethroid treatments showed limited efficacy in reducing mite loads.
  • Viral titres (AKI and DWV) generally increased seasonally, correlating with Varroa mite numbers.
  • Colonies with reduced mite loads post-treatment were more likely to survive winter, with significantly lower viral titres observed in survivors compared to collapsed colonies.

Conclusions:

  • Varroa mite control is crucial for honey bee colony survival, as it influences overwintering success and viral pathogen loads.
  • Current Varroa treatment strategies may require optimization to effectively mitigate mite populations and associated virus transmission.
  • The study supports the Varroa-virus model, emphasizing the interconnectedness of mite infestation and viral disease in colony health.