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 LEWISBURG, Pa. (AP) - Scientists investigating a mysterious ailment that killed many of the nation's honeybees are concentrating on pesticides and a new pathogen as possible culprits, and some beekeepers are already trying to keep their colonies away from pesticide-exposed fields.
After months of study, researchers are finding it difficult to tie the die-off to any single factor, said Maryann Frazier, a senior extension associate in Penn State University's entomology department.
"Two things right now ... that are really keeping us focused are the pathogen and the role of pesticides," Frazier said.
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