USDA-ARS identifies key stressors causing honey bee colony collapse in the US
USDA’s Agricultural Research Service (ARS) is investigating the alarming collapse of honey bee colonies across the United States recently shed some insite into the problem. Their recent research highlights the presence of high levels of deformed wing virus A and B, along with acute bee paralysis, in affected colonies.
These viruses are primarily spread by Varroa destructor mites. USDA scientists found that these mites have developed resistance to amitraz, a miticide widely used by beekeepers. This resistance complicates current pest control strategies, urging scientists to seek new solutions.
“Our nation’s food supply thrives, and is sustained, by the work of our pollinators,” underlined Acting ARS Administrator Joon Park. “USDA scientists continue to research major stressors and new parasite treatment strategies, which will help reduce the agricultural challenge presented by the Varroa mites in honey bee colonies.”
In early 2025, reports showed that over 60% of commercial bee colonies had been lost since the previous summer—a devastating blow worth $600 million. ARS researchers gathered samples from California and other western states before almond pollination, analyzing both surviving colonies and individual sick bees.
“While viruses are a likely end-stage cause of colony death, these results do not rule out the importance of other long known challenges to honey bees,” said ARS Research Leader Dr. Judy Chen.
Honey bees are vital for pollinating crops valued at over $20 billion in the U.S. and $387 billion worldwide. Protecting them is crucial for agriculture and food production.
ARS scientists continue to monitor bee health and search for effective mite control measures, aiming to secure the future of pollination services and U.S. agriculture.
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