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
Congress has just over a month of working days left for the year. Plan for uneven USDA service until funding is restored, and closely monitor Farm Bill talks, as avoiding Permanent Law before January 1 is the single biggest risk to markets and milk prices.
Focus on home radon testing—not changing your diet—because background sources vastly outweigh any exposure from naturally radioactive foods.
Treasury Secretary Scott Bessent stated this week that the government will intervene to help, following China’s withdrawal from the U.S. soybean market. One trader says the industry will remain in a holding pattern until Tuesday.
University of Illinois Ag Economist Gary Schnitker says early projections indicate soybeans will be more profitable than corn in 2026.
Farm CPA Paul Neiffer joins us to provide an updated analysis of projected ARC and PLC payments and potential delays due to the ongoing government shutdown.
Dr. Beetham outlined the background of the EU’s decision to modernize seed regulations and where the process stands today, and its impact on global agriculture and food security.
“It, all of a sudden, says that tracking and fighting hunger is not a priority, apparently, at the federal level.”
In a final rule published in the Federal Register, the Department states that it will no longer base wage rates on the Farm Labor Survey.
Trump’s upcoming talks raise hopes for U.S. soybeans, but China’s record purchases from Brazil and Argentina show America’s market share remains under heavy pressure.

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:

Farmer Bridge Assistance payments provide immediate balance-sheet support heading into 2026, but remain a short-term bridge rather than a substitute for long-term market recovery.
The New Year is here, but in Oregon, some ranchers and livestock producers are still trying to recover from record wildfires back in 2024.
High ownership does not always translate into high output, underscoring the importance of structural differences in understanding state-level farm performance.
Record yields are cushioning production declines, but softer prices underscore the importance of cost control and market timing for vegetable growers.
Cuba remains a small but dependable, cash-only outlet for U.S. grain and food products.
Expanding cheese exports are strengthening U.S. milk demand and reinforcing global competitiveness.
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.