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EPA Announces Changes To Dicamba Registration

young cotton field

Farmers spray dicamba over the top of cotton  genetically engineered to resist dicamba. This practice helps keep their fields clean by controlling weed pests, particularly glyphosate-resistant pigweed.

On Oct. 31, the U.S. Environmental Protection Agency announced it is extending the registration of dicamba for two years for “over-the-top” use to control weeds in fields for cotton and soybean plants genetically engineered to resist dicamba.

This action was input from and extensive collaboration between EPA, state regulators, farmers, academic researchers, pesticide manufacturers and other stakeholders.

“EPA understands that dicamba is a valuable pest control tool for America’s farmers,” says EPA Acting Administrator Andrew Wheeler.

“By extending the registration for another two years with important new label updates that place additional restrictions on the product, we are providing certainty to all stakeholders for the upcoming growing season.”

The following label changes were made to ensure that these products can continue to be used effectively while addressing potential concerns to surrounding crops and plants.

Dicamba Registration Decisions For 2019-2020 Growing Season

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• Two-year registration (until Dec. 20, 2020)

• Only certified applicators may apply dicamba over the top (those working under the supervision of a certified applicator may no longer make applications)

• Prohibit over-the-top application of dicamba on soybeans 45 days after planting and cotton 60 days after planting

• For cotton, limit the number of over-the-top applications from 4 to 2 (soybeans remain at 2 OTT applications)

• Applications will be allowed only from 1 hour after sunrise to 2 hours before sunset

• In counties where endangered species may exist, the downwind buffer will remain at 110 feet, and there will be a new 57-foot buffer around the other sides of the field (the 110-foot downwind buffer applies to all applications, not just in counties where endangered species may exist)

• Clarify training period for 2019 and beyond, ensuring consistency across all three products

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• Enhanced tank clean out instructions for the entire system

• Enhanced label to improve applicator awareness on the impact of low pH’s on the potential volatility of dicamba

• Label clean up and consistency to improve compliance and enforceability

The registration for all dicamba products will automatically expire on Dec. 20, 2020, unless EPA further extends it.

The agency reviewed substantial amounts of new information and concluded that the continued registration of these dicamba products meets the Federal Insecticide, Fungicide, and Rodenticide Act’s registration standards. It has also determined that extending these registrations with the new safety measures will not affect endangered species.

To learn more, visit https://www.epa.gov/ingredients-used-pesticide-products/registration-dicamba-use-genetically-engineered-crops.

The Environmental Protection Agency contributed this article.