Trichogramma belongs to hymenoptera, Trichogramma family insects, mainly used to control crop lepidoptera pests, such as corn borer, cotton bollworm, cabbage worm, etc., the control effect can reach 85%. Trichogramma female bees actively seek out insect eggs in farmland and lay eggs in them. After hatching, trichogramma eggs feed on the host egg fluid and eventually kill the host egg.