Pesticide

A substance that kills harmful organisms (for example, an insecticide or fungicide).

A toxic chemical product that kills harmful organisms (e.g. insecticides, fungicide, weedicides, rodenticides).

(PES-tih-side) Any substance that is used to kill insects and other pests.

Substances or mixtures thereof, intended for preventing, destroying, repelling, or mitigating any pest. Also, any substance or mixture intended for use as a plant regulator, defoliant, or desiccant.