Insect Repellent &
Biopesticide FAQ

Usually, yes. In the United States, products that claim to prevent, destroy, repel, control, or mitigate pests are generally regulated as pesticides. This includes mosquito repellents, tick repellents, larvicides, adulticides, spatial repellents, treated materials, and other products marketed for pest-control purposes. Most such products must be registered with the U.S. EPA before they are sold or distributed, unless they qualify for a specific exemption.

Yes. Insect repellents and larvicides are generally regulated as pesticides because they are intended to affect pests. Repellents are intended to repel pests, while larvicides are intended to kill or control immature pest stages, such as mosquito larvae. The product form does not control the answer; sprays, granules, dunks, oils, tablets, treated materials, and other delivery systems may all be pesticides if they are marketed with pesticidal claims.

Not automatically. “Natural,” “plant-based,” “DEET-free,” “non-toxic,” or “essential oil” does not by itself exempt a product from pesticide regulation. Some products may qualify for the FIFRA 25(b) minimum-risk exemption, but only if the formula, ingredients, claims, and labeling meet the exemption requirements.

A FIFRA 25(b) minimum-risk pesticide is a product that may be exempt from federal EPA registration if it meets specific requirements. The product must use eligible active ingredients, eligible inert ingredients, proper ingredient labeling, and compliant claims. If the product does not meet all exemption criteria, EPA registration may be required before sale.

Often, yes. A federal exemption does not automatically allow sale in every state. Many states require pesticide registration, label review, fees, or other approvals before a product can be sold, even when the product is exempt from federal EPA registration.

An EPA-registered product has gone through EPA review and receives an EPA Registration Number that must appear on the label. A 25(b) exempt product does not receive an EPA Registration Number, but it must still meet the federal exemption criteria and may still require state-level registration or review before sale.

Yes. CLBR can review product claims, intended use patterns, formulation information, and proposed marketing language to help identify whether a repellent, larvicide, biopesticide, or other pest-control product may require EPA registration, may qualify for a FIFRA 25(b) exemption, or may need state-level registration support. CLBR can also help identify efficacy testing and data needs to support a compliant path to market.

Yes. Registration status should be evaluated early, before finalizing the formula, label, website language, marketplace listing, or efficacy testing plan. Whether a product is EPA-registered, FIFRA 25(b) exempt, or subject to state registration affects the claims that can be made, the data that may be needed, and the pathway to legal sale. Early review can help avoid developing unsupported claims, using ineligible ingredients, or generating data that does not match the intended registration pathway.