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