EPA Proposes Temperature-Based Cutoffs For Dicamba Use

Farmers will need to closely monitor forecasts if the regulatory changes are implemented, as temperature cutoffs will replace fixed spray dates.

NASHVILLE, Tenn. (RFD-TV) — The Environmental Protection Agency (EPA) is shifting its approach to over-the-top (OTT) dicamba applications on dicamba-tolerant cotton and soybeans. Instead of calendar-based cutoffs, the agency has proposed a new system tied to temperature forecasts, requiring applicators to use data from the National Weather Service or NOAA.

The new labels move away from past state-imposed cutoff dates and instead rely on daily and next-day temperatures, according to Nicholas Brown with the North Carolina State Extension Service.

  • Applications are permitted when both forecasts remain below 75 degrees Fahrenheit, with 20 fluid ounces of volatility reducing agent (VRA) required.
  • Between 75-85 degrees, the VRA requirement doubles.
  • At 85–95 degrees, applicators must either reduce treated acreage by 40 percent or eliminate tank mix partners, still including a VRA.
  • Any forecast of 95 degrees or higher prohibits use altogether.

The EPA says the changes simplify compliance compared to the past 40-page labels, though state regulators caution that shifting from date cutoffs may complicate planning. If finalized, the new labels could apply for the 2026 growing season.

Tony’s Farm-Level Takeaway: Farmers will need to closely monitor forecasts, as temperature cutoffs replace fixed spray dates. Planning flexibility may be reduced during hot spells, making compliance more weather-dependent.
Related Stories
Corn export strength remains a key demand anchor, while China’s continued involvement in soybeans and sorghum bears close watching for price direction.
Strong crush demand and rising ethanol production are pressuring feedstocks, as traders monitor storage risks and supply chain uncertainty and await the upcoming January WASDE report.
According to multiple reports, Sen. Amy Klobuchar is considering a bid for Minnesota governor. If elected, this would open a key seat on the Senate Agriculture Committee.
Last year was a busy year for pesticide litigation in the United States. At No. 10, it kicks off RFD-TV Legal Expert Roger McEowen’s list of the “Top 10” Agricultural Law and Tax Developments of 2025.
Cotton demand depends on demonstrating performance and reliability buyers can rely on, not messaging alone.
Read the full press release published by the U.S. Department of Agriculture.

Tony St. James joined the RFD-TV talent team in August 2024, bringing a wealth of experience and a fresh perspective to RFD-TV and Rural Radio Channel 147 Sirius XM. In addition to his role as Market Specialist (collaborating with Scott “The Cow Guy” Shellady to provide radio and TV audiences with the latest updates on ag commodity markets), he hosts “Rural America Live” and serves as talent for trade shows.

LATEST STORIES BY THIS AUTHOR:

China’s reliance on imported soybeans remains entrenched, shaping global demand and trade leverage.
Cuba remains a steady, nearby buyer of U.S. poultry, pork, dairy, and staples, but legal and compliance risks could still affect shipping and payment channels.
Agriculture remains a key drag on regional growth amid weak prices and policy uncertainty.
Tight cattle supplies favor poultry and pork while keeping beef margins under pressure.
Wed, 2/18/26 – 7:30 PM ET
Agriculture Shows
Special 3-part series tells the story of the Claas family’s legacy, which changed agriculture forever.
From soil to harvest. Top Crop is an all-new series about four of the best farmers in the world—Dan Luepkes, of Oregan, Illinois; Cory Atley, of Cedarville, Ohio; Shelby Fite, of Jackson Center, Ohio; Russell Hedrick, of Hickory, North Carolina—reveals what it takes for them to make a profitable crop. It all starts with good soil, patience, and a strong planter setup.
Champions of Rural America is a half-hour dive into the legislative priorities for Rural America. Join us as we interview members of the Congressional Western Caucus to learn about efforts in Washington to preserve agriculture and tackles the most important topics in the ag industry on Champions of Rural America!
Featuring members of Congress, federal and state officials, ag and food leaders, farmers, and roundtable panelists for debates and discussions.