Sixty-two percent of U.S. commercial honey bee colonies died between June 2024 and January 2025.
USDA researchers detected virus-carrying varroa mites in nearly all the dead colonies.
Every mite tested showed resistance to amitraz, the only remaining effective miticide.
Loss of amitraz protection threatens bee health and U.S. crop pollination.
Beekeepers need to use varied mite control methods and secure more research funding.
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