Fact brief: Does Monsanto v. Durnell bar Maine from adding differing health warnings to pesticide labels?

PORTLAND PRESS HERALD • July 20, 2026

Yes. Monsanto v. Durnell bars all subnational entities, including Maine, from adding health warnings to pesticide labels different from the federal government’s. The U.S. Supreme Court ruled in a 7-2 vote that under federal law states cannot impose labeling requirements “in addition to or different from” those required by the U.S. Environmental Protection Agency.