The invention discloses an insecticide as well as a preparation method and application thereof, and relates to the technical field of
pesticide preparation. According to the invention, the
bifenthrin-
clothianidin compound, the rhizoma polygonati
essential oil and the
sophoricoside are combined as effective components of the insecticide, and chemical sources and
plant sources are combined, so that the
control effect of the insecticide on potato underground pests can be improved, the
drug resistance risk of the pests is reduced, and the yield and quality of potatoes can be improved. The rhizoma polygonati
essential oil and the
sophoricoside are compounded, so that the synergistic effect on improving the insecticidal effect of the insecticide is achieved. Besides,
gelatin is adopted as a
wall material and insecticidal effective components are adopted as a core material to prepare the insecticide with a microcapsule structure, so that the lasting period of the
pesticide effect can be prolonged, and the insecticide is suitable for underground pests living in soil and having a relatively long active period.