The present invention has the following formula (1) [Formula 1] (Wherein, although R 1 and R 2 represent a hydrogen atom or a methyl group, R 1 and R 2 except when the same.) Compounds represented by or plant disease control agent containing the salt thereof as an active ingredient , plant disease control method applying the plant disease control agent in diseases plants and novel compound or a salt thereof represented by the formula (1),.本発明は、下記式（１）【化１】（式中、Ｒ1及びＲ2は水素原子またはメチル基を表すが、Ｒ1とＲ2が同一である場合は除く。）で示される化合物またはその塩を有効成分として含有する植物病害防除剤、前記植物病害防除剤を病害植物に施用する植物病害防除方法、及び前記式（１）で示される新規化合物またはその塩。
