EPA Releases Four Neonicotinoid Risk Assessments for Public Comment

The U.S. Environmental Protection Agency has published preliminary pollinator-only risk assessments for the neonicotinoid insecticides clothianidin, thiamethoxam, and dinotefuran and also an update to its preliminary risk assessment for imidacloprid, which we published in January 2016. The updated imidacloprid assessment looks at potential risks to aquatic species, and identifies some risks for aquatic insects.

The assessments for clothianidin, thiamethoxam, and dinotefuran, similar to the preliminary pollinator assessment for imidacloprid showed: most approved uses do not pose significant risks to bee colonies. However, spray applications to a few crops, such as cucumbers, berries, and cotton, may pose risks to bees that come in direct contact with residue. In its preliminary pollinator-only analysis for clothianidin and thiamethoxam, the EPA has proposed a new method for accounting for pesticide exposure that may occur through pollen and nectar. Continue reading

Can attractive toxic sugar baits harm nontarget species? Scientists test a new ingredient to find out

Mosquito control may well be one of the most debated topics among IPM professionals. Pesticide sprays such as DDT and malathion have been decried by groups concerned about their effect on the environment, while groups concerned about the health risks posed by mosquitoes argue that the chemicals save lives. In some situations, attractive toxic sugar baits (ATSBs) have been used as an alternative to broadcast sprays, with effective results.

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