Researchers believe they are closing in on what is causing the decline in the number of honeybees.
A new study by French scientists points to a pesticide called neonicotinoid (NEE-oh-NIK-uh-tin-oyd).
Purdue Entomologist Christian Krupke says there seems to be more of a direct link between chemical use and Colony Collapse Disorder. He says specifically, this nicotine-based class of pesticides. The French researchers gave a non-lethal dose to honeybees they studied, which led to behavioral changes.