New Safety Rules for Dicamba Herbicide Use

By Scout Nelson

The Minnesota Department of Agriculture (MDA) has announced important restrictions for dicamba use during the 2026 growing season. These rules apply to over-the-top (OTT) applications on dicamba-tolerant soybean crops. The aim is to reduce the risk of herbicide drift and protect nearby crops, plants, and natural areas.

Three dicamba herbicides are approved for use this year. These include Engenia, Tavium, and Stryax. Each product must follow both federal and Minnesota-specific rules. Only licensed and certified applicators are allowed to purchase and use these products. Applicators must also check the latest product guidelines on the manufacturer’s website within seven days before application.

Special cutoff dates have been set based on location. Areas south of Interstate 94 must stop dicamba application after June 12. In northern areas, applications are allowed until June 30. In addition to this, there is a statewide temperature limit. Dicamba cannot be applied if the temperature at the time of spraying exceeds 85 degrees. It is also restricted if the weather forecast predicts temperatures above this limit.

Other important rules must also be followed carefully. Applicators are required to complete annual training provided by manufacturers. They must carry proper product labels during application. Only two applications per year are allowed, with limits on the total amount used per acre. Approved additives must be included to reduce drift and control chemical stability.

To protect nearby areas, a 240-foot buffer must be maintained between treated fields and sensitive locations such as water bodies or neighboring fields. Applications must not be done if sensitive plants are present downwind. There are also growth-stage limits that restrict when these herbicides can be used on crops.

Environmental protection is also a key focus. Applicators must follow Endangered Species Act guidelines by adopting approved practices such as buffer zones and cover cropping. These measures help reduce chemical movement through soil and water. For more details, users can visit the MDA information pages.

Following these rules will ensure safe use of dicamba and help protect crops, environment, and public health.

Photo Credit: minnesota-department-of-agriculture