Acetochlor is a herbicide widely used on corn in Minnesota, and to a limited extent, also on soybeans. Common trade names for acetochlor include Harness, Keystone, SureStart, Surpass, Volley and Warrant. It, along with atrazine, another widely used corn herbicide, has been frequently detected in Minnesota's surface water, at times at elevated levels. The following sections explain acetochlor's role in Minnesota agriculture, its impact on Minnesota's environment, and actions being taken to reduce the presence of acetochlor in water.
Current activities and updates
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Response to acetochlor water quality impairments
Two south-central Minnesota streams, the Le Sueur River and Little Beauford Ditch, are on the state's list of impaired waters because of in-stream concentrations of acetochlor. A response to the impairments is being developed by the Minnesota Department of Agriculture in collaboration with an advisory committee and the Minnesota Pollution Control Agency.
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Revised acetochlor BMPs
Best Management Practices (BMPs) for acetochlor were revised in March 2010 to better address how acetochlor products are currently used and to provide better guidance on application setbacks and filter strip use.
MDA Contacts
Gregg Regimbal, Supervisor
Pesticide Management Unit
651-201-6671
gregg.regimbal@state.mn.us
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