Monsanto v. Durnell · ¶109

All this has implications for the meaning of FIFRA’s preemption provision. The provision’s language establishes that when FIFRA itself or the EPA’s regulations require specific statements on a pesticide’s label—such as the skull and crossbones or a particular “signal word”—a state law that requires additional or different statements is preempted. But, absent such federal-law requirements, a state-law duty that simply parallels FIFRA’s misbranding prohibition is not preempted.

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