PROBLEM TO BE SOLVED: To provide: a liquid bait agent that has a high eat-appetite for pest insects and provides a sufficient insecticidal effect, and in addition, has an excellent antiseptic property, is resistant to bacteria propagation, and is hygienic； and a pest insect control method using said liquid bait agent.SOLUTION: Provided are: a liquid bait agent containing (A) component: an insecticidal component such as a neonicotinoid-based insecticidal component, (B) component: a saccharide, (C) component: a polyhydric alcohol such as dipropylene glycol or propylene glycol, (D) component: an antiseptic agent such as a quaternary ammonium salt, and (E) component: water； and also provide a pest insect control method using said liquid bait agent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】害虫の喫食性が高く殺虫効果が十分に得られるうえ、防腐性に優れ、菌が繁殖しにくく衛生的である液体ベイト剤、及び該液体ベイト剤を用いた害虫駆除方法を提供することを目的とする。【解決手段】（Ａ）成分：ネオニコチノイド系殺虫成分等の殺虫成分と、（Ｂ）成分：糖類と、（Ｃ）成分：ジプロピレングリコール、プロピレングリコール等の多価アルコールと、（Ｄ）成分：第４級アンモニウム塩等の防腐剤と、（Ｅ）成分：水と、を含有する液体ベイト剤。また、該液体ベイト剤を用いた害虫駆除方法。【選択図】なし
