Under FIFRA, all pesticides must be classified by what manner?

Under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), all pesticides are indeed classified as either restricted use or general use. This classification is important because it reflects the safety and usage guidelines associated with each pesticide.

Restricted use pesticides are those that may pose a risk to human health or the environment when used improperly, and therefore can only be applied by certified applicators or under their direct supervision. The restrictions help ensure that these more hazardous substances are handled by individuals who have received proper training and are aware of the risks involved.

On the other hand, general use pesticides are deemed safe enough to be used by the general public without special training or certification. This classification allows for broader accessibility while still ensuring safety measures are in place for less hazardous substances.

The other classifications mentioned, such as toxic vs. nontoxic or carcinogenic vs. non-carcinogenic, do not align with the specific regulatory framework established by FIFRA for pesticide use categorization. Hence, the focus on the restricted and general use classification provides a clear understanding of how pesticides are regulated based on their potential impact on health and the environment.