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

Preliminary Imidacloprid Pollinator Risk Assessment Technical Briefing Webinar Slated for February 18

The U.S. Environmental Protection Agency (EPA) will hold an online technical briefing on its preliminary pollinator risk assessment for imidacloprid, a neonicotinoid insecticide, on February 18, 2016, from 1PM to 2:30PM (Eastern Standard Time). Register for the webinar at https://epawebconferencing.acms.com/imidtechbriefreg/event/event_info.html. Continue reading

EPA Opens Public Comment Period on the First of Four Preliminary Risk Assessments for Insecticides Potentially Harmful to Bees

The U.S. Environmental Protection Agency (EPA) has opened the 60-day public comment period for its preliminary pollinator risk assessment for imidacloprid, a neonicotinoid insecticide, in a Federal Register notice published today. After the comment period ends, the EPA may revise the pollinator assessment based on comments received and, if necessary, take action to reduce risks from the insecticide.

The preliminary risk assessment identified a residue level for imidacloprid of 25 ppb, above which effects on pollinator hives are likely to be seen and below which effects are unlikely. These effects may include reduction in numbers of pollinators as well as the amount of honey produced. Continue reading

EPA Releases the First of Four Preliminary Risk Assessments for Insecticides Potentially Harmful to Bees

The U.S. Environmental Protection Agency (EPA) has announced a preliminary pollinator risk assessment for the neonicotinoid insecticide, imidacloprid, which shows a threat to some pollinators. EPA’s assessment, prepared in collaboration with California’s Department of Pesticide Regulation, indicates that imidacloprid potentially poses risk to hives when the pesticide comes in contact with certain crops that attract pollinators.

“Delivering on the President’s National Pollinator Strategy means EPA is committed not only to protecting bees and reversing bee loss, but for the first time assessing the health of the colony for the neonicotinoid pesticides,” said Jim Jones Assistant Administrator of the Office of Chemical Safety and Pollution Prevention. “Using science as our guide, this preliminary assessment reflects our collaboration with the State of California and Canada to assess the results of the most recent testing required by EPA.” Continue reading

Consultant survey paints North Carolina’s 2013 cotton insect picture

From Southeast Farm Press

By Jack Bacheler, North Carolina Extension Entomologist

Information from North Carolina’s licensed independent crop consultants is invaluable in determining cotton pest status and insecticide inputs from region to region and from one year to the next.

Their responses to our survey questionnaire are both an accurate account of the past “insect year” and represent approximately one third of North Carolina’s total cotton acreage.

Continue reading