PROBLEM TO BE SOLVED: To provide a pesticide composition for water surface application having excellent water surface spreadability. A coating layer containing (1) one or more kinds of pesticide active ingredients, (2) glycol ether solvent, (3) one or more kinds of solid surfactants, and (4) ) A surface-applied pesticide composition containing a particle nucleus containing one or more kinds of hollow mineral carrier, a plant carrier and/or a synthetic resin foam (the apparent specific gravity of the particle nucleus is less than 1), and Providing a manufacturing method thereof. [Selection diagram] None【課題】水面拡展性の優れた水面施用農薬組成物の提供。【解決手段】（１）１種又は２種以上の農薬有効成分、（２）グリコールエーテル系溶剤、（３）１種又は２種以上の固体の界面活性剤を含有する被膜層、並びに（４）１種又は２種以上の中空状鉱物質担体、植物担体及び／又は合成樹脂発泡体を含有する粒核（当該粒核の見掛け比重は１未満である）を含む水面施用農薬組成物、並びにその製造方法の提供。【選択図】なし
