chlorothalonil

Four pesticides commonly used on crops to kill insects and fungi also kill honeybee larvae within their hives, according to new research. Scientists also found that N-methyl-2-pyrrolidone — an inert, or inactive, chemical commonly used as a pesticide additive — is highly toxic to honeybee larvae.

from the StarTribune:

"Many Minnesotans are regularly exposed to [it] in the air they breathe," said Emily Marquez, a scientist at PAN. "Even at low levels, airborne pesticides can raise serious health concerns."

The Environmental Protection Agency (EPA) shares the Smiths’ concerns. It considers the fungicide — chlorothalonil — a likely carcinogen, based on animal testing, and an irritant to the skin, eyes and respiratory system. And it is extremely toxic to many forms of aquatic life.