What is a pesticide?

pesticide is a chemical that is used to kill or control a pest .  The term pest refers to any organism that bothers humans or hinders their activities. Pests can be insects, rodents, weeds, and organisms that cause disease. Pesticides are categorized according to the pest or problem that they control. For example, insecticides control insects, herbicides control weeds, and fungicides control fungi.

Homeowner Introduction to Pesticides

Types of Pesticides (Learning Module)