Biopesticide composition for preventing and treating tetranychus urticae and preparation method and application thereof

The invention discloses a biopesticide composition for preventing and controlling tetranychus urticae, and relates to the technical field of pest mite biopesticide prevention and control. The biopesticide composition comprises a component A and a component B, wherein the component A is prepared from bacillus thuringiensis, mineral oil and eugenol; the component B is prepared from radix stemonae, rhizoma chuanxiong, radix sophorae flavescentis, cortex dictamni, rumex japonicus roots and radix euphorbiae lantu. Microbial source pesticide, mineral source pesticide and botanical pesticide are combined for controlling tetranychus urticae. Compared with the existing chemical pesticide, the biopesticide composition not only has a better control effect, but also does not generate toxic effects onnatural enemies such as orius minutus, chrysopa septempunctata, ladybugs and predatory mites of the tetranychus urticae and does not cause pesticide residues on fruits and harm human health and can also reduce pollution to wa