An object of the present invention is to provide a poison bait precursor for pests having high eating performance against pests. The poison bait precursor of the present invention is a toxic bait suitable for controlling centipedes, which contains an insecticidal component and an attractant component, absorbs moisture in the atmosphere with the lapse of time, deliquesces the attractant component, Solid state insect poison bait which becomes a state where the surface is covered with attractant ingredients that have become sluggish.本発明は、害虫に対して高い喫食性を有する害虫用毒餌剤を提供することを目的とする。本発明の害虫用毒餌剤は、ムカデの防除に適した毒餌剤であって、殺虫成分と誘引成分とを含有し、経時的に大気中の水分を吸収して誘引成分が潮解し、液状となった誘引成分で表面が覆われた状態となる固形状の害虫用毒餌剤である。
