1,2-BENZISOTHIAZOLE DERIVATIVE, AND AGRICULTURAL OR HORTICULTURAL PLANT DISEASE-CONTROLLING AGENT

摘要

Disclosed is a 1,2-benzisothiazole derivative or a salt thereof which is not harmful to a crop and is remarkably effective on an agricultural or horticultural plant disease such as rice blast disease, wheat glume blotch, cucumber downey mildew and cucumber anthracnose. Also disclosed is a controlling agent for an agricultural or horticultural plant disease, which comprises the derivative or the salt as an active ingredient. The 1,2-benzisothiazole derivative is represented by the general formula [I]: [I] wherein R1 represents a hydrogen atom or a halogen atom; and R2 represents a methyl group or a halogen atom.