| abstract |
A 1,2-benzoisothiazole derivative or a salt thereof is not harmful to a crop and is remarkably effective against agricultural or horticultural plant diseases such as Pyricularia oryzae, Septoria nodorum, Pseudoperonospora cubensis and Colletotrichum orbiculare , and an agricultural or horticultural plant disease-controlling agent containing the derivative or its salt as an active ingredient. The 1,2-benzoisothiazole derivative is represented by the general formula [I]: n n n n n n n n n n (wherein R 1 is a hydrogen atom or a halogen atom, and R 2 is a methyl group or a halogen atom), or a salt thereof. |