High number of pesticides within colonies linked to honey bee deaths
Honey bee colonies in the United States have been dying at high rates for over a decade, and agricultural pesticides — including fungicides, herbicides and insecticides — are often implicated as major culprits. Until now, most scientific studies have looked at pesticides one at a time, rather than investigating the effects of multiple real-world pesticide exposures within a colony.
A new study is the first to systematically assess multiple pesticides that accumulate within bee colonies. The researchers found that the number of different pesticides within a colony — regardless of dose — closely correlates with colony death. The results also suggest that some fungicides, often regarded as safe for bees, correlate with high rates of colony deaths. The study appeared online September 15, 2016, in the journal Nature Scientific Reports.
