How to Manage Pests

Pests in Gardens and Landscapes

Natural enemies

Natural enemies can be very important in the control of aphids, especially on farms and gardens not sprayed with broad-spectrum pesticides that kill natural enemy species as well as pests. Usually, natural enemy populations do not appear in significant numbers until some time after aphids begin to be numerous. Among the most important natural enemies are natural fungal diseases, various species of parasitic wasps, and predators such as lady beetles, soldier beetles, and syrphid fly larvae. Some of the most common general predators are green lacewings, damsel bugs, assassin bugs, bigeyed bugs, minute pirate bugs, and spiders.

For more information, see the Natural Enemies Gallery.

Green lacewing adult
Green lacewing adult


Statewide IPM Program, Agriculture and Natural Resources, University of California
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