What are the biological control methods of crop pests?

Trichogramma is used to control Dendrolimus punctatus, Lepidoptera is used to control Dendrolimus punctatus, parasitic natural enemy rust mite is used to control hidden pests, Monochamus alternatus, Monochamus alternatus and Anoplophora glabripennis are used to control whiteness in the United States, Hemiberlesia pitysophila is used to control Hemiberlesia, and Anoplophora glabripennis is used to control Anoplophora glabripennis.

Use microorganisms to prevent and control. Commonly used are fungi, bacteria, viruses and bacteria that can secrete antibiotics against biomass, such as Beauveria bassiana (fungi) for controlling Dendrolimus punctatus, various Bacillus thuringiensis preparations (bacteria) for controlling various forest pests, virus crude extracts (viruses) for controlling cypress, Dendrolimus punctatus and Paulownia moth, 5406 (actinomycetes) for controlling seedling blight, microsporidia for controlling gypsy moth and other larvae (primary)

By hanging artificial nests to attract beneficial birds such as great tits, woodpeckers and grey magpies, the harm of leaf-eating pests and moth-eating pests can be obviously reduced.

Set up a black light or a high-voltage pest control lamp to trap and kill adults. Seeds and cuttings are treated with ultrasound, heat treatment, radiation and other methods to eliminate pathogens or pests. For example, soaking the roots of paulownia seeds in warm water of 4 1 ~ 5 1℃ for one hour can prevent paulownia witches' broom.