Diniconazole is a broad-spectrum fungicide. It can be sprayed on grapes, grains and fruits to prevent powdery mildew and scab. It is used as a azole fungicide and an inhibitor of sterol demethylation. It has the functions of protection, treatment and eradication, as well as broad-spectrum, internal absorption and top conduction antifungal activity. It has a good effect on ascomycete, basidiomycete and semi intellectual diseases, such as rust, powdery mildew, scab and Cercospora diseases.