PROBLEM TO BE SOLVED: To provide an aminopyridine derivative useful as an active element of an agricultural and horticultural insecticide having reliable effect and capable of being used safely.SOLUTION: There is provided an agricultural and horticultural insecticide containing a compound represented by the formula (I) where R1 is a hydrogen atom, a formyl group or the like, R2 is a hydrogen atom, a C1-8 alkyl group unsaturated or having a substituent or the like, R3 is a halogen atom or the like, n represents the number, an integer of 0 to 3, one of X and Y represents a nitrogen atom, the other represents a nitrogen atom or an oxygen atom, A represents a bivalent binding group, a ring B represents 5- or 6-membered hetero ring, a benzene ring or the like, Z represents a single bond, a methylene group or the like and R4 represents a C1 to 8 alkyl group unsubstituted or having a substituent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】効果が確実で安全に使用できる農園芸用殺菌剤の有効成分として有用なアミノピリジン誘導体の提供。【解決手段】式(I)で表わされる化合物を含有する農園芸用殺菌剤。〔式中、R1は、水素原子、ホルミル基など、R2は、水素原子、無置換の若しくは置換基を有するC1-8アルキル基など、R3は、ハロゲン原子など、nは、個数を表し、0~3のいずれかの整数、XおよびYは、一方が窒素原子を、他方が窒素原子または酸素原子を、Aは、2価の連結基を、環Bは、5員若しくは6員ヘテロ環、ベンゼン環などを、Zは、単結合、メチレン基などを、R4は、無置換の若しくは置換基を有するC1~8アルキル基などを示す。〕【選択図】なし
