Fipronil is a phenyl pyrazole insecticide with a wide insecticidal spectrum. It is mainly stomach toxic to pests, and has contact and certain internal absorption effects. It has high insecticidal activity against important pests such as aphids, leafhoppers, planthoppers, lepidoptera larvae, flies and coleoptera. Applying it to soil can effectively control corn root beetles, golden needle worms and land tigers. When spraying on leaves, it has a high level of control effect on diamondback moth, pieris rapae, rice thrips, etc., and has a long duration.