# Opinion Summary: Monsanto v. Durnell | Court Axes Roundup Cancer Suits

Page: https://stenobird.com/podcast/the-high-court-report-7304353/opinion-summary-monsanto-v-durnell-court-axes-roundup-cancer-suits
Text version: https://stenobird.com/podcast/the-high-court-report-7304353/opinion-summary-monsanto-v-durnell-court-axes-roundup-cancer-suits.md
Podcast: [The High Court Report](https://stenobird.com/podcast/the-high-court-report-7304353)
Published: 2026-07-02T09:00:00+00:00
Episode link: https://thehighcourtreport.com//opinion-summary-monsanto-v-durnell-court-axes-roundup-cancer-suits
Audio file: https://episodes.captivate.fm/episode/af159cee-7261-40a6-9d03-56672a325182.mp3
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Duration seconds: 957

## Resource

Monsanto Co. v. Durnell | Case No. 24-1068 | Docket Link: Here | Argued: April 27, 2026 | Decided: June 25, 2026 Overview: Federal pesticide law blocks a Missouri cancer patient's failure-to-warn lawsuit against Monsanto after the EPA repeatedly approved Roundup's label without requiring a cancer warning, despite the patient's claims linking Roundup to his non-Hodgkin's lymphoma. Question Presented: Whether the Federal Insecticide, Fungicide, and Rodenticide Act expressly preempts a state-law failure-to-warn claim seeking a cancer warning the EPA declined to require. Posture: Missouri jury awarded Durnell $1.25M; Court of Appeals affirmed; Supreme Court reversed and remanded. Main Arguments: • Monsanto (Petitioner): (1) EPA's registration and label approval without a cancer warning creates a binding federal requirement that preempts stricter state demands; (2) Riegel v. Medtronic establishes that analogous agency approval processes create preemptive federal requirements; (3) Missouri's failure-to-warn verdict retroactively penalizes Monsanto for complying with the federal label EPA mandated. • Durnell (Respondent): (1) FIFRA's misbranding prohibition — not EPA's specific label approval — sets the operative federal labeling requirement, and Missouri's tort mirrors it exactly; (2) FIFRA § 136a(f)(2) bars treating registration as a complete defense, stripping EPA approval of conclusive force; (3) Manufacturers can add a cancer warning through amended registration or minor modification, defeating impossibility preemption. Holding: FIFRA's preemption clause, 7 U.S.C. § 136v(b), expressly preempts Durnell's state-law failure-to-warn claim because the claim would require Monsanto to add a cancer warning to Roundup's label in addition to or different from the label required un…

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