PROBLEM TO BE SOLVED: To provide a novel bactericide for agricultural and horticultural use having bactericidal activity for agricultural and horticultural use, a compound used as an active ingredient thereof and a method for producing the same.SOLUTION: The present invention provides PF1451A material discovered in a culture medium of a Penicillium microorganism, Penicillium sp. PF1451 strain NITE P-01785, having a novel chemical structure and represented by formula (1), and PF1451B material of a similar structure, or a bactericide for agricultural and horticultural use comprising them, and a method for producing them by microorganism culture.SELECTED DRAWING: None【課題】農園芸用殺菌活性を有する新規農園芸用殺菌剤、その有効成分として利用される化合物及びその製造法の提供【解決手段】ペニシリウム属の微生物Penicillium sp. PF1451株NITE P-01785の培養液中に見出した新規な化学構造を有する式（１）で表されるPF1451A物質及び類似の構造のPF1451B物質またはそれらを含んでなる農園芸用殺菌剤、並びに、その微生物培養法による製法【選択図】なし
