Problem to provide new fungicide, especially fungicide for agricultural gardening.Hydrazine derivatives of formula (I) or their salts, and fungicide containing them.(W is o or s a is o or s R1 is C1-C6 alkyl, C1 to C6 alkoxy, R2 R2 is h, C1-C6 alkyl, etc. R3 is h, C1-C6 alkyl R4 and R5 are independently h halogen H, halogen, nitro, cyano, etc.No selection【課題】新規な殺菌剤、特に農園芸用殺菌剤の提供。【解決手段】式(I)のヒドラゾン誘導体又はその塩、及びそれらを含有する殺菌剤。[WはO又はS;AはO又はS;R1はC1~C6アルキル、C1~C6アルコキシ等;R2はH、C1~C6アルキル等;R3はH、C1~C6アルキル等;R4及びR5は夫々独立にHハロゲン等;R6~R9は夫々独立にH、ハロゲン、ニトロ、シアノ等;R10はH、C1~C6アルキル等]【選択図】なし
