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How to Manage Pests

Pests in Gardens and Landscapes

Trichogramma spp.

Trichogramma species are important natural enemies of the corn earworm, cabbage looper, hornworms, and other caterpillars. Eggs parasitized by Trichogramma turn black and are easy to tell from normal eggs. They occur naturally in gardens and farms but may also be purchased for release. Little information is available on the effectiveness of Trichogramma releases in gardens.

Trichogramma  laying an egg in a moth egg
Trichogramma laying an egg in a moth egg

Parasitized moth eggsParasitized moth eggs


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2009 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/GARDEN/VEGES/PESTS/trichogramma.html revised: August 17, 2009. Contact webmaster.