ST. PAUL — The U.S. Environmental Protection Agency has given approval to the Minnesota Department of Agriculture’s state-specific use restrictions for three dicamba herbicide products during the 2022 growing season in Minnesota. The restrictions are aimed at curbing off-site movement of the products.

The affected dicamba formulations are Engenia by BASF; Tavium by Syngenta; and XtendiMax by Bayer. These are the only three dicamba products labeled for use on dicamba-tolerant soybeans.

Because of a high number of alleged drift complaints in the 2021 growing season, the MDA is registering the three products for use in Minnesota in 2022 with the following additional restrictions:

Date cutoff — No application shall be made south of Interstate 94 after June 12, 2022. North of Interstate 94, use is prohibited after June 30, 2022.

Temperature cutoff state-wide — No application shall be made if the air temperature of the field at the time of application is over 85 F or if the National Weather Service’s forecasted high temperature for the nearest available location for the day exceeds 85 degrees. Forecasted temperature must be recorded at the start of the application.

The product label with these EPA-approved Minnesota-specific restrictions will be available on the product manufacturer’s website (Bayer, BASF, or Syngenta). Check the company’s website to download the restrictions prior to application of any of these three dicamba products. The restrictions will also be promoted through the mandatory dicamba-specific training required for anyone applying one of the approved products. Compliance with these Minnesota-specific restrictions and other restrictions listed on the product label is mandatory.

Other federal requirements for the products which appear on the 2022 labels include:

Requiring an approved pH-buffering agent, also known as a volatility reducing agent, be tank mixed with dicamba products prior to all applications

Requiring a downwind buffer of 240 feet and 310 feet in areas where listed endangered species are located.

In addition to the cutoff date, Xtendimax and Tavium have crop growth stage cutoffs.

In Minnesota, Engenia, Tavium, and XtendiMax formulations of dicamba are approved for use on dicamba-tolerant soybeans only and are restricted use pesticides. The dicamba products are only for retail sale to and use by certified applicators.

Pesticide product registrations are renewed on an annual basis in Minnesota.

This article was submitted by the Minnesota Department of Agriculture.

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