Which law prohibits the use of any registered pesticide in a manner inconsistent with label directions?

• A. Federal Insecticide Fungicide and Rodenticide Act
• B. Federal Environmental Pesticide Control Act
• C. Toxic Substances Control Act
• D. Clean Air Act

Answer: (B)

Pesticide labels set the legal way a product may be used. The law that prohibits using a registered pesticide in a manner inconsistent with its label directions is FIFRA—the Federal Insecticide Fungicide and Rodenticide Act. This law requires that pesticides be registered and sold with an approved label, and it makes any use not aligned with that label illegal, with penalties for violations. The label specifies critical details like application rates, timing, target pests, any restricted-entry or buffer zones, and required protective equipment, so sticking to those directions is effectively following the law.

The other acts mentioned address different regulatory areas—one focuses on broader environmental pesticide controls, another on chemical substances, and another on air quality—rather than the specific requirement that pesticide use follow the label. That’s why FIFRA is the correct choice.