Brown lacewings thrive in cool weather — both adults and larvae are active predators of common pests.

Application Rates

Preventive 0.1/100 ft2 , High 10/100ft2 as needed. 

Description

The brown lacewing (Micromus variegatus) is a generalist predator that targets aphids, thrips, whitefly, mealybugs, leafhoppers, moth eggs, small caterpillars and more!

Adults are pale brown with oval shaped wings covered in small hairs just over 1/2 inch in length. Lacewing larvae resemble tiny alligators and both adults and larvae have strong mandibles for attacking their prey.

Unlike the green lacewing, the brown lacewing is predatory as an adult as well as in the larval form and can tolerate cooler temperatures. These aggressive predators are active at night and can establish in the crop. The larvae can consume up to 80 aphids a day.

The female lacewing lays her eggs in the lower leaves. Each female lays around 100-150 eggs during their lifetime. Optimal conditions are between 59-79°F with a relative humidity greater than 30%, but they are active between 39-88°F. 

Instructions for Use

If release is not possible upon arrival (due to weather conditions) the eggs can be stored at no lower than 50°F (10°C) for up to 48 hours. To minimize egg mortality, humidity should be approximately 75%. Warmer temperatures will speed up larval emergence, but the eggs should not be held at more than 80°F (26°C). Do not refrigerate the larvae, release immediately. 

When targeting caterpillars, lacewing used in conjunction with Trichogramma wasps (see Caterpillar Control) can be very effective. Since Trichogramma attack only the egg stage, the lacewing offers a second line of defense; it feeds on eggs and young caterpillars. 

Orders for Micromus variegatus must be received by noon on Friday for shipment the following week. If the deadline is past, please call us and we will help you find a solution ASAP. (360) 656-6680

See order deadlines and shipping information.

Learn about release instructions for beneficial insects.