PROBLEM TO BE SOLVED: To provide a germicide for agriculture and horticulture containing, as an effective component, an amidinopyridine compound which is excellent in bactericidal activity and safety and can be industrially advantageously synthesized.SOLUTION: There is provided a germicide for agriculture and horticulture which contains at least one selected from the group consisting of a compound represented by the formula (I) and a salt thereof. (where, X and Y each independently represent an alkylene group or the like G represents a carbon atom or a nitrogen atom Y represents a divalent cyclic amine residue or the like R1 to R7 each independently represent a hydrogen atom, a hydrocarbon atom, a heterocyclyl group or the like Ra and Rb each independently represent a halogeno group, an alkyl group or the like.)SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】殺菌活性に優れ、安全性に優れ、且つ工業的に有利に合成できるアミジノピリジン化合物を有効成分として含有する農園芸用殺菌剤を提供する。【解決手段】式(I)で表される化合物およびその塩からなる群より選ばれる少なくともひとつを含有する農園芸用殺菌剤。(式(I)中、XおよびZはそれぞれ独立にアルキレン基などを示し、Gは炭素原子または窒素原子を示し、Yは二価の環状アミン残基などを示し、R1~R7はそれぞれ独立に水素原子、炭化水素基、ヘテロシクリル基などを示し、RaおよびRbはそれぞれ独立にハロゲノ基、アルキル基などを示す。)【選択図】なし