A plant disease control agent containing, as an active ingredient thereof,a compound of formula (1) (wherein, X1and X4each independently represent a fluorine atom or the like, X2and X3each independently represent a hydrogen atom, a fluorine atom or the like, Xa represents a group of formula (2), (3), (4), (5), or (6), J represents an oxygen atom or the like, Q represents an oxygen atom or the like, A represents a substitutable phenyl group or the like, Aa represents a piperidin-1-yl group or the like, Qb represents an oxygen atom or the like, Ab represents a hydrogen atom or the like, Z represents a hydrogen atom or the like, m represents an integer of 1 to 3, Ja and Jb each independently represent an oxygen atom or the like, G represents a phenyl group or the like, and Ad represents an alkyl group, an alkyloxy group, or the like) and a plant disease control method are provided.本發明為提供一種植物病害防除劑及植物病害防除方法，其係含有下述式(1)表示之化合物作為有效成分(式中，X1及X4分別獨立表示氟原子等，X2及X3分別獨立表示氫原子或氟原子等，Xa為下述式(2)、(3)、(4)、(5)或(6)表示之基，J表示氧原子等，Q表示氧原子等，A表示可具有取代基之苯基等，Aa表示哌啶-1-基等，Qb表示氧原子等，Ab表示氫原子等，Z表示氫原子等，m表示1～3之整數，Ja及Jb分別獨立表示氧原子等，G表示苯基等，Ad表示烷基或烷氧基等)。
