Many bee experts assumed varroa mites were a major cause of the severe die-off in the winter of 2005. Yet when researchers from the U.S. Department of Agriculture (USDA) Bee Research Laboratory in Beltsville, Maryland, traveled to Oakdale, California, where Anderson and a number of his fellow beekeepers spend winter and spring, they could find no correlation between the level of varroa mite infestation and the health of bee colonies. "We couldn't pin the blame for the die-off on any single cause," says Jeff Pettis, a research entomologist at the lab.
Anderson has his own ideas about what caused the almond pollination crisis, and what is most responsible for wiping out honeybees across the United States. "Varroa is a bit of a red herring," he says. "One of the biggest problems is irresponsible use of pesticides and the failure of regulators to enforce the rules meant to protect bees from poisoning."
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