For more than a decade, litigation over glyphosate-based herbicides has sat at the intersection of federal pesticide regulation, state tort law, scientific risk assessment, and broader debates over the role of juries in evaluating product safety. The Supreme Court's June 25, 2026, decision in Monsanto Company v. Durnell (Durnell) represents the Court's most significant interpretation of the Federal Insecticide, Fungicide, and Rodenticide Act's (FIFRA) preemption provision since Bates v. Dow...
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The U.S. Supreme Court issued one of the most significant pesticide law decisions in years on June 25, 2026, holding in Monsanto Co. v. Durnell that the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) expressly preempts state-law failure-to-warn claims that would require pesticide labels to include warnings beyond those required by the U.S. Environmental Protection Agency (EPA). The Court's 7-2 decision is expected to have far-reaching implications for pesticide manufacturers,...
On November 7, 2023, the Ninth Circuit affirmed the District Court for the Eastern District of California’s (District Court) June 22, 2020, decision granting summary judgment in favor of Plaintiffs. The Ninth Circuit entered a permanent injunction enjoining the California Attorney General from enforcing Proposition 65’s (Prop 65) carcinogen warning requirement for the herbicide glyphosate. National Ass’n of Wheat Growers et al. v. Bonta (Opinion).The Ninth Circuit found that requiring the...
On July 12, 2022, the U.S. Court of Appeals for the Eleventh Circuit (Court) issued an opinion in Carson v. Monsanto that reverses a ruling by the U.S. District Court for the Southern District of Georgia (District Court) that the Plaintiff’s failure to warn claim under Georgia law was preempted by the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). The Plaintiff alleged that Monsanto’s label for its product Roundup®, which contains the active ingredient glyphosate,...
April 26, 2022
OEHHA Announces Modification to Proposed Regulation on Safe Harbor Warnings for Glyphosate and Addition of Documents to Rulemaking File
On April 13, 2022, the Office of Environmental Health Hazard Assessment (OEHHA) issued a Notice of Modification to Proposed Regulation on Safe Harbor Warnings for Glyphosate and Addition of Documents to Rulemaking File (Notice). OEHHA first proposed this regulation by publishing a Notice of Proposed Rulemaking on July 23, 2021. OEHHA provided a 75-day comment period on the original proposal and its Initial Statement of Reasons (ISOR), including an extension to file comments until...
The European Chemicals Agency (ECHA) and the European Food Safety Authority (EFSA) have received a draft assessment of glyphosate carried out by four European Union (EU) member states and have begun to consider the findings. According to ECHA’s June 15, 2021, press release, the national authorities of France, Hungary, the Netherlands, and Sweden -- known as the Assessment Group of Glyphosate (AGG) -- examined all the evidence submitted by the companies that are seeking renewed approval to...
October 16, 2020
California to Consider Prop 65 Listing for Glyphosate, Neonicotinoids, and Other Substances
On October 6, 2020, the California Developmental and Reproductive Toxicant Identification Committee (DARTIC) announced it will be meeting on December 11, 2020, to discuss the possible developmental and reproductive toxicity (DART) of 22 chemical substances and chemical groups, including glyphosate and its salts, and three neonicotinoid pesticides (acetamiprid, clothianidin, and imidacloprid). DARTIC is composed of scientists who advise California’s Office of Environmental Health...
On June 22, 2020, the U.S. District Court for the Eastern District of California granted summary judgment for the Plaintiffs in National Association of Wheat Growers et. al. v. Becerra, and entered a permanent injunction against enforcement of a Proposition 65 (Prop 65) warning label for pesticide products containing glyphosate. The court found that requiring the registrants of glyphosate products to include such a warning could not be justified as a valid restriction on commercial...
On February 3, 2020, the U.S. Environmental Protection Agency (EPA) issued a Federal Register notice announcing the availability of an interim registration review decision for glyphosate. EPA previously issued a proposed interim registration review decision (PID) for glyphosate for comment in April 2019. At the time EPA issued the glyphosate PID for comment, EPA also issued a draft human health risk assessment and a preliminary ecological risk assessment for...
September 11, 2019
EPA Seeks Comment on its Risk Assessment Methodology for Evaluating Potential Synergistic Effects of Pesticides on Non-Target Organisms
On September 9, 2019, the U.S. Environmental Protection Agency (EPA) Office of Pesticide Programs (OPP) published a notice in the Federal Register announcing the availability of, and an opportunity for comment on, a document describing an “interim process” that OPP’s Environmental Fate and Ecological Effects Division is currently using to evaluate potential synergistic effects of mixtures of pesticide active ingredients on non-target organisms. As part of...