Pesticide

1. An agent used to destroy pests such as weeds, insects, or diseases. See also General use pesticides and Restricted use pesticides.

This is an example of a pesticide.
Source: http://www.ngoforum.org.kh/Environment/Env-Pro.htm



This is a person spraying a pesticide on a crop.
Source: http://www.citizenscampaign.org/PDFs/CCE%20Spring%202005.pdf