After weeks of lab tests, the scientists found the culprit: Fipronil, a widely used insecticide found in more than 50 pest-killing products. From Minnesota Daily:
The University Bee Lab, the Bee Squad and the Minnesota Department of Agriculture conducted tests to confirm that pesticide had caused the deaths.Pesticides killing bees are a recurring story across the country. It’s like the sequel to Silent Spring, yet the EPA still won’t act.
The MDA tests reported that all three hives tested positive for the presence of fipronil, an insecticide used on building foundations, Bee Squad coordinator Becky Masterman said.
The MDA’s report said someone in the area likely used the pesticide within a foot of a building’s foundation and sprayed it on bee-friendly flowers. Bees from all three colonies interacted with the plants and brought the insecticide back to their hives, Masterman said.
It’s unknown who sprayed the pesticide, and the MDA won’t investigate the incident further, the report said.
- Pesticides killed bees, analysis shows, Minnesota Daily