High aquatic risk of chronic exposure of imidacloprid to mayflies

The present study evaluated the acute and chronic toxicity of imidacloprid to a range of freshwater arthropods. Mayfly and caddisfly species were most sensitive to short-term imidacloprid exposures (10 tests), whereas the mayflies showed by far the most sensitive response to long-term exposure of all seven arthropod species tested (28-d EC10 values of approximately 0.03 µg/L). The results indicated a high aquatic risk of chronic exposure of imidacloprid to mayflies.

Source:
Roessink I et al. Environ. Toxicol. Chem. 2013;32:1096–1100
http://onlinelibrary.wiley.com/doi/10.1002/etc.2201/abstract