PROBLEM TO BE SOLVED: To provide an agrochemical formulation having an enhanced effect of an agrochemical active ingredient without an agricultural worker doing mixing work.SOLUTION: Particles of an agrochemical active ingredient that is solid at 25°C are mixed with particles of zinc oxide, to form a layer composed of the particles of zinc oxide on each surface of the particles of the agrochemical active ingredient.SELECTED DRAWING: None【課題】農業従事者が混和作業を行わなくても、農薬活性成分の効力が増強された農薬製剤を提供する。【解決手段】25℃で固体の農薬活性成分の粒子と、酸化亜鉛の粒子とを混合することにより、農薬活性成分の粒子表面に、酸化亜鉛の粒子からなる層を形成する。【選択図】なし