PROBLEM TO BE SOLVED: To provide a plant disease control agent that exhibits a high controlling effect on a wide range of plant pathogenic bacteria.SOLUTION: The present invention provides a compound represented by formula (I)[where each symbol has the same meaning as in the specifications] or a salt thereof, a bactericide for agricultural and horticultural use containing the compound as an active ingredient, and a method of controlling plant diseases by applying the compound.SELECTED DRAWING: None【課題】幅広い植物病原菌に対する高い防除効果を発揮する植物病害防除剤を提供する。【解決手段】本発明は、式(I): 【化1】 【0001】[式中、各記号は明細書中と同義である]で表される化合物又はその塩、当該化合物を有効成分として含有する農園芸用殺菌剤、及び当該化合物を施用する植物病害の防除方法を提供する。【選択図】なし