How do green lacewing larvae help control aphid populations?

Green lacewing larvae, often called aphidlions, are highly effective at controlling aphid populations due to their voracious appetites for these garden pests.1

These larvae utilize prominent, specialized mouthparts to capture their prey. Unlike some other predators that chew their victims, the aphidlion inserts its mandibles into the body of an aphid and drains its visceral and body fluids through a channel or groove located on the inside of the mandible.12

To ensure their offspring have immediate access to food, female green lacewings strategically lay their eggs on stalks within or near aphid colonies. Some larvae, known as "trash bugs," further enhance their hunting success by camouflaging themselves with debris—including the remains of their victims—which allows them to surprise and consume aphids more effectively. Because of these predatory habits, green lacewings are widely recognized as beneficial insects and are actively encouraged as a form of biological control in agricultural and garden settings.12