Kumiai Chemical Industry Co., Ltd.

Ihara Chemical Industry Co., Ltd.

Atsushi Kogure

Ryo Hanai

Norihisa Yonekura

Toshihiro Nagata

Isao Kaneko

A 3,4-dihalogenoisothiazole derivative represented by the general formula [I] (wherein Ris a halogen atom; A is an oxygen atom or a sulfur atom; and R is a C-Calkyl group, a C-Calkenyl group, a C-Calkynyl group, a C-Ccycloalkyl group, a phenyl group or a 5- to 10-membered heterocyclic group containing at least one of oxygen atom, sulfur atom and nitrogen atom), or a salt thereof.

3,4-dihalogenoisothiazole derivative, and agricultural or horticultural plant disease-controlling agent

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 asand, 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]: (wherein Ris a hydrogen atom or a halogen atom, and Ris a methyl group or a halogen atom), or a salt thereof.

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Tokyo, Japan

Atsushi Kogure