PROBLEM TO BE SOLVED: To provide an aqueous suspension preparation for direct scattering on a paddy field under flooding, and having good diffusivity of a weeding active ingredient in the paddy field, especially excellent diffusivity of the chemical precipitated on the surface of the soil in the paddy field.SOLUTION: The aqueous suspension preparation for direct scattering on the paddy field under flooding comprises the weeding active ingredient, a fatty acid ester of sucrose, an anionic surfactant and water, and has &le35 mN/m surface tension at 20°C.COPYRIGHT: (C)2008,JPO&INPIT【課題】水田中への除草活性成分の拡散性がよく、特に水田中の土壌表面に沈降した薬剤の拡散性が優れる、湛水下水田の直接散布用水性懸濁製剤を提供すること。【解決手段】除草活性成分、ショ糖脂肪酸エステル、陰イオン界面活性剤および水よりなり、20℃における表面張力が35mN/m以下であることを特徴とする、湛水下水田の直接散布用水性懸濁製剤。【選択図】なし