Definition FIFRA *.any substance or mixture of substances intended for preventing,destroying,repelling or mitigating any insects,rodents,nematodes, fungi,or weeds or any other form of life declared to be pests.and any substance or mixture of substances intended for use as a plant regulator,defoliant or desiccant." Federal Insecticide,Fungicide,and Rodenticide Act(FIFRA-1947) k●，A Small Dose of Toxicology A Small Dose of Pesticide-2/29/04A Small Dose of Toxicology A Small Dose of Pesticide – 2/29/04 Definition - FIFRA “. any substance or mixture of substances intended for preventing, destroying, repelling or mitigating any insects, rodents, nematodes, fungi, or weeds or any other form of life declared to be pests. . and any substance or mixture of substances intended for use as a plant regulator, defoliant or desiccant.” Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA – 1947)