By Jamie Martin
The U.S. Environmental Protection Agency has issued a time-limited approval for over-the-top dicamba use on dicamba-tolerant cotton and soybeans. The approval applies only to the next two growing seasons and includes the most restrictive safety measures in the product’s history.
Farmers have long relied on dicamba to control herbicide-resistant weeds such as Palmer amaranth, which can grow several inches per day and damage entire fields. Many producers have warned that without this tool, crop yields and farm income could suffer significant losses.
EPA said the decision was based on a comprehensive scientific review. The agency examined hundreds of independent studies and field reports, focusing on worker safety and environmental impacts. EPA concluded that dicamba does not pose unreasonable risks when applied according to the new label requirements.
Major changes include cutting the total amount of dicamba allowed per acre by half and requiring higher amounts of volatility reduction agents to limit vapor drift. Farmers must also adopt conservation practices to reduce runoff and protect endangered species. Additional restrictions apply during hot weather, when dicamba movement risks increase.
Earlier safety rules remain in place, including certified applicator requirements, annual training, personal protective equipment, and a 24-hour restricted entry interval. Strict limits wind speed, spray height, droplet size, and buffer zones to continue, and aerial application is still prohibited.
EPA made clear that these rules are legally enforceable under federal law. Applicators who fail to follow label directions may face fines or criminal penalties. The agency will monitor results closely and review performance data before considering future approvals.
This action reflects EPA’s effort to balance environmental protection with farmers’ need for effective weed-management tools.
Photo Credit: istock-fangxianuo
Categories: National