Chlorpyrifos is an insecticide widely used on soybeans in Minnesota to control aphids, but is also used in other important crops, as well as in other non-food, golf course turf, industrial sites, greenhouse and nursery production, sod farms and wood products. Common trade names for chlorpyrifos include Lorsban, Govern, and Pilot.
Chlorpyrifos, along with atrazine and acetochlor, has been detected with increasing frequency in Minnesota's surface water, at times at elevated levels. The following sections explain chlorpyrifos’ role in Minnesota agriculture, its impact on Minnesota's environment, and actions being taken to minimize its impacts to water.
The Minnesota Department of Agriculture (MDA) has posted in the September 16 edition of the State Register notice of a public comment period on draft water quality Best Management Practices (BMPs) for agricultural insecticides and specifically for the organophosphate insecticide chlorpyrifos. More information
The MDA has developed a set of Frequently Asked Questions (PDF: 146 KB / 3 pages) about the Commissioner’s April 2012 determination that chlorpyrifos is a surface water “Pesticide of Concern.”
Gregg Regimbal, Supervisor
Pesticide Management Unit