IPM employs physical, mechanical, cultural and biological tactics to keep pest numbers low enough to prevent intolerable damage or annoyance. Chemical controls are used as a last resort and the least-toxic chemicals are preferred. Twenty-three different pesticides have been found in small streams around Puget Sound. IPM protects the natural enemies that help to keep pests in check and avoids unnecessary chemical use that may endanger human health and the environment. Children are more likely to be exposed to pesticides and are especially sensitive to toxic chemicals.
Pesticides can be toxic to pets, non-target species, and other wildlife.
Some pesticides contain ingredients listed as probable carcinogens. One driving force behind increased local involvement in IPM is the listing of the Chinook salmon as threatened under the Endangered Species Act. Lawn and garden chemicals include some of the most hazardous products used in the home. Pesticides and fertilizers are commonly used lawn and garden chemicals. Pesticides are agents used to kill pests.