Chlorpyrifos products and their use in Minnesota

By Haley Johnson, Pesticide Management Unit Supervisor, Minnesota Department of Agriculture

Reviewed by Sally Raymond, Extension Educator and Commercial/Noncommercial Pesticide Applicator Program Manager, and Tana Haugen-Brown, Extension Educator and Private Pesticide Applicator Program Manager, PSEE.

Chlorpyrifos pesticides have faced significant regulatory changes over the past few years. The most recent regulatory change came in December 2024, when the EPA proposed revoking most tolerances for food and feed crops, with restrictions based on location, application rates, and protections for farmworkers and vulnerable species. In Minnesota, only alfalfa, soybeans, sugar beets, and winter wheat are expected to retain approved uses.

Pesticide users should be aware of key regulatory deadlines impacting the sale, distribution, and use of chlorpyrifos:

• April 30, 2025 – Sale and distribution of certain chlorpyrifos products must cease, except for export or disposal.
• June 30, 2025 – Use of existing stock for food and feed purposes will be prohibited. However, non-food uses may continue within a two-year post-cancellation period unless additional EPA restrictions are enacted.

In Minnesota, the MDA has conditionally registered several chlorpyrifos products for use in 2025. During this transition period, users must ensure proper application in accordance with labeling requirements:

• Products with old labeling – After June 30, 2025, these may only be used for non-food purposes.
• Products with new labeling – These may still be used for food purposes, provided they comply with updated EPA guidelines.

For a list of the products affected by the regulatory deadlines listed above and the most up-to-date information on chlorpyrifos, visit the EPA’s Chlorpyrifos FAQs page.

This information is current as of March 7, 2025, and may be subject to change as new updates from the EPA become available.

Contact Haley Johnson, Haley.Johnson@state.mn.us with questions.