PROBLEM TO BE SOLVED: To provide an insecticidal effect promoter of an insecticide, a method for promoting an insecticidal effect of the insecticide, and an insecticide composition, exerting a high insecticidal effect and capable of saving the usage of an insecticide.SOLUTION: There are disclosed the insecticidal effect promotor consisting of oxidized cellulose, the method for adding the insecticidal effect promotor to the insecticide, and the insecticide composition containing the insecticide and the insecticidal effect promotor.COPYRIGHT: (C)2013,JPO&INPIT【課題】高い殺虫効果を発揮し、殺虫剤の使用量を減少させることのできる、殺虫剤の殺虫効力増強剤、殺虫剤の殺虫効力増強方法および殺虫剤組成物を提供すること。【解決手段】酸化セルロースからなる殺虫剤の殺虫効力増強剤、該殺虫効力増強剤を殺虫剤に添加する殺虫剤の殺虫効力増強方法、並びに殺虫剤と前記殺虫効力増強剤を含有する殺虫剤組成物とする。【選択図】なし