Pesticide Laws and Regulations
The Core Framework
Pesticide law in the United States runs through FIFRA (the Federal Insecticide, Fungicide, and Rodenticide Act), which requires every pesticide sold or distributed to be registered with EPA unless a specific exemption applies. Registration is a label-approval process: the label is the legal instrument that authorizes use, and using a product in a manner inconsistent with its labeling is itself a violation. Maine layers state authority on top through the Board of Pesticides Control, which licenses applicators, certifies businesses, and can impose standards stricter than federal ones.
Concepts You Must Know
Understand the difference between a restricted-use pesticide (available only to certified applicators or under their direct supervision) and a general-use pesticide. Know the meaning of special local needs (Section 24(c)) registrations and emergency exemptions (Section 18); both are limited and time-bound. Know that worker protection rules and recordkeeping obligations attach to many applications, and that Maine requires records for commercial and certain private applications.
Common Traps
Questions often test the idea that a label is a floor, not a ceiling: a state may be more restrictive but never less. Another trap is confusing direct supervision (the certified applicator must be available and able to direct, and for some products physically present) with mere instruction. Misapplying to a site not on the label, or at a rate above the label, is a violation even if the product "works."
Rule of Thumb
If it is not on the label, it is not allowed. When in doubt, the more restrictive rule (state or label) governs.
Worked example: A label lists turfgrass but not ornamental beds. Treating ornamentals with that product is a misuse, regardless of intent or efficacy.