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Chrysopa is also called Chrysopa, and its larvae are called aphid lice. Chrysopa is a predatory insect, which may lay eggs in wood, glass, aluminum alloy windows and other places. Except for a few species, most eggs have a long silk stalk, the base of which is fixed on the branches, leaves and bark of plants, while eggs are hung high at the end of the silk stalk.

Chrysopa adults and larvae have strong predation ability, mainly preying on aphids, scale insects, red spiders and many insect eggs, as well as moth larvae.

Common in China are Chrysopa grandis, Chrysopa Callicarpa (Chrysopa minor), Chrysopa sinica, Chrysopa yezoensis, Chrysopa asiatica and so on.

If 30,000-50,000 Chrysopa eggs are released per mu of cotton field in the peak spawning period of cotton bollworm, Chrysopa larvae hatched from the eggs can prey on pests, and the effect is remarkable after 4 days.

In summer, when people walk in the fields, they can often see an insect, which has a soft green body and four big transparent wings and flies slowly in the air. This is the famous insect killer-Chrysopa. Chrysopa is a predatory insect, belonging to Insecta Neuroptera. There are 86 genera *** 1350 species known in the world. According to the investigation, there are about 100 species 15 genera recorded in China, which are distributed in the north and south of China. Because Chrysopa can effectively prey on many important agricultural pests, people have widely carried out the work of killing pests by using Chrysopa manually.