PROBLEM TO BE SOLVED: To provide an economical algae inhibitor that capable of obtaining high effect even on granular algae occurring in a water system, to which only an isothiazoline-based agent is added, even by addition of low concentration of the inhibitor, and to provide a method for inhibiting algae.SOLUTION: The algae inhibitor contains an isothiazoline-based compound and a cationic polymer as active ingredients, and is effective to the granular algae occurring in a water system in which only an isothiazoline-based agent is used.COPYRIGHT: (C)2013,JPO&INPIT【課題】イソチアゾリン系薬剤だけを添加している水系に発生してくる粒状藻類に対しても、低濃度の添加でも高い効果が得られる経済的な藻類抑制剤及び藻類抑制方法を提供することを目的とする。【解決手段】イソチアゾリン系化合物とカチオン系ポリマーとを有効成分として含有する、イソチアゾリン系薬剤だけを使用している水系に発生する粒状緑藻に有効な藻類抑制剤。【選択図】なし
