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HÂþ»­ University Agricultural Campus graduate student Daniel O’Neal is examining the interaction of pesticide residues, Varroa mites and Nosema in honeybee colony stress.

Across Canada honeybees offer pollination services worth $2-billion annually, he told the Nova Scotia Beekeepers annual meeting. But the last several years have seen sporadically high losses of between 30-40 per cent of honeybees.

O’Neal surmised the reasons for the losses could possibly be pesticides, parasites or an interaction between the two.

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