Dicamba's 2026 Re-Registration: What It Means for Organic Neighbors

If you grow organic vegetables, fruit or specialty crops next to soybean or cotton, dicamba is probably already on your radar. The herbicide has been sprayed "over the top" of dicamba-tolerant crops since 2016. It has been pulled from the market by courts twice, and it is back again for 2026.

On February 6, 2026, EPA conditionally registered three over-the-top dicamba products with what it called the strongest protections in agency history. Two weeks later, farm and environmental groups sued to overturn the decision. As of September 2026, we found no court ruling in that case.

This post explains the new label rules, how organic residue and buffer rules apply to drift, what a major June 2026 Supreme Court decision did and did not decide, and how to document and protect your farm.

Key takeaways

• EPA registered Stryax (formerly XtendiMax), Engenia and Tavium for over-the-top use on cotton and soybeans for the 2026–2027 seasons. The registrations expire February 8, 2028.
• New label rules include a 240-ft downwind buffer, a 95 °F temperature cutoff, a required volatility reduction agent and strict wind and timing limits.
• Groups challenged the registrations in the Ninth Circuit on February 20, 2026. As of September 2026, no ruling had been found.
• Organic crops with prohibited residues above 5% of the EPA tolerance cannot be sold as organic.
• Drift does not by itself cost a farm its certification, but it can cost you the organic premium on an affected crop.
• Monsanto v. Durnell (June 25, 2026) is a glyphosate labeling case about failure-to-warn claims. It did not decide anything about dicamba's registration or whether glyphosate causes cancer.

How we got here

The 2026 challenge is the fourth legal fight over over-the-top dicamba since 2016. The petitioners are the National Family Farm Coalition, Center for Biological Diversity, Pesticide Action & Agroecology Network, and Center for Food Safety. They allege violations of FIFRA and the Endangered Species Act. DTN/Progressive Farmer reported an Iowa vegetable farmer describing a significant decline in marketable produce from dicamba damage.

According to the National Agricultural Law Center, the plaintiffs' opening brief was due May 11, 2026, and EPA's response June 10, 2026. A NALC attorney judged the chance of a halt during the 2026 season to be low, though not zero. As of September 2026, check for any Ninth Circuit ruling or stay before planning around the registrations.

On the scale of damage: plaintiffs say dicamba has damaged millions of acres and generated thousands of complaints since 2016. Those are advocacy claims. We did not review official EPA incident tallies.

What the 2026 labels require

EPA's February 2026 announcement lists these restrictions for over-the-top use:

For neighbors, these rules matter in two ways. They set the conditions under which a lawful application should happen, and they give you a checklist for judging whether an application near your farm may have broken the label. Only your state pesticide regulator can make that determination.

The buffer can be reduced with additional mitigation. Do not assume a 240-ft gap will always be in place next to your field.

How organic rules treat drift

The 5% residue threshold

Under 7 CFR 205.671, if residue testing finds a prohibited substance above 5% of the EPA tolerance, "the agricultural product must not be sold, labeled, or represented as organically produced."

That is a limit on the crop, not a penalty on the farmer. If drift pushes residues on a harvest over the line, that harvest loses its organic market even though you did nothing wrong.

Buffers and land requirements

Under 7 CFR 205.202 and 205.2, organic land must:

• have had no prohibited substances applied for 3 years before harvest;
• have "distinct, defined boundaries and buffer zones such as runoff diversions to prevent the unintended application of a prohibited substance";
• use buffers "sufficient in size or other features (e.g., windbreaks or a diversion ditch)" to prevent contact.

The National Organic Program sets no fixed buffer width. Your certifier decides case by case. Widths of 25–30 ft are reportedly common in certifier guidance, but they are not federal law.

What drift does and does not do to certification

• Does not: Drift from a neighbor's field does not automatically cost your farm its certification, as long as you did not apply the substance.
• Does: A crop above the 5% threshold cannot be sold as organic.
• Leaves you with the loss: Organic farmers generally have to seek compensation through state complaint processes or civil lawsuits.

Talk to your certifier about your specific situation.

What Monsanto v. Durnell did and did not decide

Some growers have asked whether the Supreme Court's June 2026 glyphosate decision changes their options after drift. Here is what the sources show.

What the Court decided

• The case: Monsanto v. Durnell, decided June 25, 2026, by a 7–2 vote. Justice Kavanaugh wrote the majority opinion. Justice Jackson dissented, joined by Justice Gorsuch.
• The holding: FIFRA, the federal pesticide law, expressly preempts state-law failure-to-warn claims that would require warnings beyond the EPA-approved label.
• The underlying case: a $1.25 million Missouri verdict for Durnell in a Roundup case.
• Claims that may survive, according to a Holland & Knight analysis: manufacturing defect, express warranty, fraud not tied to label content, off-label conduct, and state regulation of pesticide sale or use.

What the Court did not decide

• It did not rule that glyphosate is safe. It is a ruling about which law governs warning labels, not a scientific finding about cancer. IARC classified glyphosate as "probably carcinogenic" in 2015, while EPA maintains it is "not likely to be carcinogenic to humans."
• It was not a dicamba case. It did not address dicamba's 2026 registration or the pending Ninth Circuit challenge.
• It did not address drift damage to neighbors, as far as the sources we reviewed describe. They frame the holding around failure-to-warn claims about label content. How it might affect other kinds of claims is a question for a lawyer in your state.

Protecting and documenting your farm

Before the spray season

• Map neighbors' fields and note which crops they grow.
• Introduce yourself. Share your organic status, crop locations and sensitive periods. Ask your extension office or state agriculture department whether your state offers a way to flag sensitive crops.
• Review buffers with your certifier. Ask whether windbreaks, hedgerows or diversion ditches would strengthen your plan.
• Know your state's complaint process and who to call at your state pesticide regulatory agency.
• Review insurance with your agent to understand what is and is not covered.

If you suspect drift

• Photograph damage right away, with dates, locations and wide and close shots.
• Record weather: wind speed and direction, temperature and time.
• Note nearby activity: sprayers seen, fields treated, and dates.
• Report promptly to your state pesticide agency and follow its complaint process.
• Notify your certifier and ask about residue testing.
• Keep affected harvest separate until you know whether it can be sold as organic.
• Track losses: yields, lost premiums and extra costs.
• Talk to an attorney before signing anything or making claims.

What to do next

1. Check the Ninth Circuit case status before the next season, as of September 2026 still pending as far as we found.
2. Meet with your certifier to review buffers and drift response plans.
3. Contact neighbors before spraying season.
4. Put the documentation checklist where your crew can find it.
5. Get legal advice from an attorney familiar with agricultural law in your state if drift happens. This article is not legal advice.

Sources

• Dicamba FAQs & Resources — National Agricultural Law Center (accessed Sept 2026)
• The Deal With Dicamba: Court Vacates Over-the-Top Registration — National Agricultural Law Center (Feb 2024)
• EPA Implements Strongest Protections in Agency History for Over-the-Top Dicamba Use on Cotton and Soybeans for Next Two Growing Seasons — US EPA (Feb 6, 2026)
• Groups Petition Federal Court to Vacate New OTT Dicamba Labels — DTN/Progressive Farmer (Feb 20, 2026)
• Lawsuit filed to halt dicamba use; Roundup settlement appears ahead of SCOTUS case — National Agricultural Law Center/UADA (Mar 18, 2026)
• Farmers challenge EPA's new regulations for controversial herbicide — Courthouse News Service (Feb 2026)
• 7 CFR 205.671 — Exclusion from organic sale — Cornell Legal Information Institute (accessed Sept 2026)
• 7 CFR 205.202 — Land requirements — Cornell Legal Information Institute (accessed Sept 2026)
• 7 CFR 205.2 — Terms defined — Cornell Legal Information Institute (accessed Sept 2026)
• Supreme Court: FIFRA Preempts State Failure-to-Warn Claims Contrary to EPA-Approved Labeling — Holland & Knight (June 2026)
• Supreme Court backs Monsanto in its fight against liability from popular weed killer — NPR (June 25, 2026)
• 24-1068 Monsanto v. Durnell (opinion) — Supreme Court of the United States (June 25, 2026)
• Glyphosate — US EPA (accessed Sept 2026)