Substituted carboxanilide derivative and plant disease control agent comprising same as active ingredient

摘要

A substituted carboxanilide derivative provided by the invention and represented by the formula (1): <CHEM> wherein A is is a hydrogen atom or methyl, B is a methyl or ethyl, and Het is 1-methyl-3-substituted-4-pyrazolyl or 2-methyl-4-substituted-5-triazoyl group, exhibits a disease control effect against Botrytis cinerea, Powdery mildew, Pyricularia oryzae of rice plant and other various plant diseases, is excellent in residual effect, has also activity against resistant strain for conventional chemicals, particularly exerts control effect against Botrytis cinerea at a lower dosage as compared with a prior art, is also safe for crops, and thus is useful as a plant disease control agent.