EPA Proposes a Decision to Approve Registration for Dicamba Labeling to Be Applied to Tolerant Soybean

By Eric Jones and Stephen Robertson et.al

Dicamba products (e.g., Engenia, Tavium, Xtendimax) previously labeled for overtop application to tolerant soybean (e.g., Xtend and Xtendflex varieties) are not registered for use during the 2025 growing season. The Environmental Protection Agency (EPA) has proposed to re-register these dicamba products for use in tolerant soybean starting in 2026. They conducted numerous human health risk assessments and did not identify any concerns. They also placed emphasis on several measures to reduce ecological risks (i.e., off target movement of the herbicide).

Proposed Application Measures

The EPA is proposing the following measures to prevent off-target movement of the herbicide:

• Single use maximum application rate of 0.5 lb. acid equivalent rate per acre.
• No more than two applications per year not exceeding 1 lb. acid equivalent per acre.
• Prohibition of aerial applications.