PROBLEM TO BE SOLVED: To provide an agrochemical formulation of new type for making an agrochemical active compound have controlled release.SOLUTION: The coated powdery agrochemical is prepared by coating an inner core, in which a powdery agrochemical is fixed with a thermosetting resin (x), with a coating film in which fine powder of an inorganic oxide selected from the group consisting of SiO2, Al2O3, TiO2, ZrO2 and ZnO is dispersed into a thermosetting resin (y). Preferably the fine powder is fine powder having a specific surface area of 10-700 m2/g and the thermosetting resin (x) and the thermosetting resin (y) are each a urethane resin.COPYRIGHT: (C)2008,JPO&INPIT【課題】農薬活性化合物を徐放化することのできる新しいタイプの農薬製剤を提供すること。【解決手段】粉状農薬が熱硬化性樹脂(x)で固められてなる内核を、熱硬化性樹脂(y)にSiO2、Al2O3、TiO2、ZrO2及びZnOからなる群より選ばれる無機酸化物の微粉が分散されてなる被膜で被覆されてなる被覆粉状農薬、好ましくは該微粉が比表面積が10~700m2/gである微粉であり、熱硬化性樹脂(x)及び熱硬化性樹脂(y)がウレタン樹脂である被覆粉状農薬;及び該被覆粉状農薬の製造方法。【選択図】なし
