Chrysopa larvae hatched from eggs are long and slightly pointed at both ends, which are also chewing mouthparts. The upper and lower two are combined into a long straw, which stretches in front of the head and can bite the bodies of pests such as aphids and suck their body fluids. Chrysopa larvae climb fast and are good at catching aphids. The newly hatched Chrysopa larvae are particularly edible and gluttonous.

According to preliminary statistics, there are many kinds of aphids that Chrysopa can prey on, such as whitefly, red spider, cotton aphid, vegetable aphid, tobacco aphid, wheat aphid, bean aphid, peach aphid, apple aphid and safflower aphid. In addition, they also like to eat the eggs of many kinds of pests, such as cotton bollworm, cutworm, armyworm, Ganlan moth, wheat moth and small bridge worm.