Beneficial Lacewings for the Garden
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Words: 381 Copyright: 2006 Marilyn Pokorney
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Many insects are beneficial insects and are friends for the
garden. These predator insects eat pest insects that would
otherwise destroy plants and the fruit and vegetables growing in
the garden. Lacewings are but one of the beneficial insects.
Green lacewings are common in most of North America. Adults feed
only on nectar, pollen, and aphid honeydew, but their larvae are
active predators.
Adult green lacewings are pale green, about one-half to
three-fourths inch long, with pale green wings, long antennae
and bright, golden eyes. Females lay oval shaped, pale green
eggs at the end of long silken stalks which turn gray in several
days. The one half inch long larvae are yellowish-gray or brown,
are very active, have well- developed legs and large pincers
with which they use to suck the body fluids from prey.
They eat many common garden pests including several species of
aphids, spider mites (especially red mites), thrips, whiteflies,
eggs of leafhoppers, moths, leafminers, small caterpillars,
beetle larvae, mealybugs, and the tobacco budworm.
Lacewing larvae eat almost as many aphids as do lady beetle
larvae. Because of this the larvae are sometimes called aphid
lions. Each lacewing larva will consume 200 or more pests or
pest eggs a week during their two to three week growth period.
The larvae then pupates by spinning a cocoon with silken thread.
About five days later adult lacewings emerge to mate and repeat
the life cycle. The adult will live about four to six weeks.
An adult female may deposit more than 200 eggs in a good
habitat. Nectar, pollen, and honeydew is required for their
reproduction. If these food sources are not available adults may
disperse to where these requirements are met.
To introduce green lacewings into a garden start early in the
season as soon as pest insects are detected. Release 1,000
eggs/200 sq. ft of garden area. Release them every ten to
fifteen days until pests are no longer seen. And never use any
pesticides or other synthetic chemical in the garden at this
time.
Lacewings work well with other predator insects including Lady
Bugs, Spider Mite Predators and Trichogamma.
As an added bonus, when adult lacewings visit flowers for
nectar, they help pollinate plants increasing fruit, vegetable,
and seed production.
For more information on lacewings visit:
http://www.apluswriting.net/garden/lacewings.htm