USDA research points to viruses spread by pesticide-resistant mites, indicating a worrying trend
U.S. beekeepers had a disastrous winter. Between June 2024 and January 2025, a full 62% of commercial honey bee colonies in the United States died, according to an extensive survey. It was the largest die-off on record, coming on the heels of a 55% die-off the previous winter.
As soon as scientists at the U.S. Department of Agriculture (USDA) caught wind of the record-breaking die-offs, they sprang into action—but their efforts were slowed by a series of federal funding cuts and layoffs by President Donald Trump’s administration. Now, 6 months later, USDA scientists have finally identified a culprit.
According to a preprint posted to the bioRxiv server this month, nearly all the dead colonies tested positive for bee viruses spread by parasitic mites. Alarmingly, every single one of the mites the researchers screened was resistant to amitraz, the only viable mite-specific pesticide—or miticide—of its kind left in humans’ arsenal.
6 months later? They’ve been working on the die-off issues for the last decade, if not longer.
At least a decade. I did a small module at uni about a decade ago on colony collapse disorder and varroa mites were a prime culprit, alongside various viruses. Plenty of research already done then, but no concrete answer at that time.
This is hardly news per se, rather a typical attention grabbing media headline saying that they came to a conclusion what the cause was last year after 6 months, whilst blaming cutbacks.