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Harmful Effects of Pesticides on Non-target Organisms
Introduction
Pesticides are found as common contaminants in soil, air, and water, and on non-target vegetation in our urban landscapes. Once there, they can harm plants and animals ranging from beneficial soil microorganisms and insects, non-target plants, fish, birds, and other wildlife. Table 1 summarizes the harmful effects to non-target organisms of some commonly used urban herbicides.
Table 1 . Harmful effects of selected herbicides on non-target organisms
Source: Sanders, 1969
Fish
When pesticides contaminate water they can be harmful to the fish that live there. Insecticides can be particularly toxic to fish. Chlorpyrifos, a common contaminant of urban streams,18 is very highly toxic to fish, and has caused fishkills in waterways near treated fields or buildings.1,2 Diazinon, also commonly found in urban streams,18 is acutely toxic to many species of fish, including
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