Green Lacewing
Chrysoperla rufilabris

 

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The common green lacewing is widely used in various situations to control many different pests. Some species of adult lacewings do not kill pest insects, they actually subsist on foods such as nectar, pollen and honeydew. It is their predacious offspring that get the job done.

The adult lacewing lays her eggs on foliage. Each egg is attached to the top of a hair-like filament. After a few days the eggs hatch and a tiny predatory larva emerges ready to eat the pests.

Lacewing larvae are also known as aphid lions. They are tiny upon emerging from the egg, but grow to 3/8 of an inch long.

Lacewing larvae voraciously attack their prey by seizing them with large, sucking jaws and inject a paralyzing venom. The hollow jaws then draw out the body fluids of the pest. Of all available commercial predators, this lacewing is the most voracious and has the greatest versatility for pests of field crops, orchards, and greenhouses.

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Each lacewing larva will devour 200 or more pests or pest eggs a week during their two to three week developmental period. After this stage, the larvae pupate by spinning a cocoon with silken thread. Approximately five days later adult lacewings emerge to mate and repeat the life cycle. Depending on climatic conditions, the adult will live about four to six weeks.

Each adult female may deposit more than 200 eggs. For best results, habitats should be provided that encourage the adults to remain and reproduce in the release area. Nectar, pollen, and honeydew stimulate their reproductive process. If these food sources are not available, adults may disperse.

Lacewing larvae feed on many different pest insects. In general, they attack the eggs and the immature stages of most soft-bodied pests such as: aphids, thrips, spider mites, sweet potato and greenhouse whitefly, mealybugs, leafhoppers, and the eggs and caterpillars of most pest moths.

When targeting caterpillars, lacewing used in conjunction with some wasps can be very effective. Since the wasp attacks only the egg stage, the lacewing offers a second line of defense; it feeds on eggs and young caterpillars.

 

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