Modified vegetable oil acaricidal insecticide, and preparation method and application thereof

The invention discloses a modified vegetable oil acaricidal insecticide, and a preparation method and an application thereof. The modified vegetable oil acaricidal insecticide is prepared from, by weight, 10-85 parts of vegetable oil, 5-15 parts of a modifier and 10-65 parts of a surfactant. The modified vegetable oil acaricidal insecticide is used to solve the problems of phytotoxicity and pesticide resistance caused by using a large amount of chemical acaricidal insecticides for a long time. After being modified, the vegetable oil has remarkable biological activity. The modified vegetable oil acaricidal insecticide has very high permeability and spreadability, and can rapidly dissolve acarid body surface waxy layers, so pests are dehydrated to death; and the modified vegetable oil acaricidal insecticide can form a layer of liquid film on the body surfaces of the pests and eggs to effectively seal pores of the pests and the eggs, so that the pests and the eggs are suffocated to death,the effect of physically