As for this invention, the isoxazole chemical compound formula (i) it possesses firing true germ activity and agricultural chemical constituent, and in, the agriculture for preventing the microbial pest and the especially true germ pest of the plant the said chemical compound and the use of the constituent which include this it regards.本発明は、殺真菌活性を有する式(I)のイソキサゾール化合物、これを含む農薬組成物、並びに植物の微生物有害生物、特に真菌有害生物の防除のための、農業における該化合物及び組成物の使用に関する。