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
David Hardin with the Indiana Soybean Alliance discusses USMEF’s push to open new global export markets for both meat and soy-based feed.
With the U.S.–Vietnam agreement nearing signature, U.S. cotton, corn, and soybean exporters could lock in new demand lanes just as global supply shifts.
The government reopens after 43 days. USDA resumes key reports, weighs farm aid, and watches China’s next move on U.S. soybean purchases.
Enforceable origin labels could create clearer premiums for U.S. cattle and address concerns some producers have had with competition from foreign imported beef.
A court decision that overturns Enlist labels would remove two major herbicides from use and reshape EPA’s future mitigation policies for other pesticides.
Friday’s release will be the first WASDE report in about two months, and early estimates indicate a corn surplus is still on the way.
A Reuters report shows China has a soybean “glut,” finding stockpiles at Chinese ports are at record levels, with crushers there holding the most supplies since 2017.
The National Milk Producers Federation (NMPF) says recent wins in markets like Malaysia and Cambodia help farmers focus on production rather than trade barriers.
Tyson expects another year of beef-segment losses due to tight cattle supplies, even as chicken, pork, and prepared foods strengthen overall margins.

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:

Tight fed supplies shift margin risk to packers, strengthening cattle price leverage but increasing volatility.
Expanding chicken supplies are likely to keep prices under pressure in early 2026 despite steady demand growth.
Prompt removal of Christmas trees and careful handling of decorations reduce winter fire risk during an already high-demand season for emergency services.
Reduced winter placements indicate tighter fed cattle supplies and greater leverage during peak-demand months.
AFBF Economist Faith Parum provides analysis and perspective on the Farmer Bridge Assistance Program—what commodity growers should know and potential remedies for producers facing crop losses where that aid falls short.
In a post to social media, Trump said Venezuela will buy American agriculture products and will use the money from oil sales to make it happen.
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.