To provide a system having an excellent attracting effect on harmful arthropods. A combination for controlling the behavior of harmful arthropods, comprising at least one compound selected from the group consisting of compounds that are attractive to the harmful arthropods, and at least one natural enemy selected from the group consisting of the natural enemies of the harmful arthropods, wherein the compound and the natural enemy are used in a mode where the harmful arthropods are synergetically attracted.本發明之課題係提供對有害節足動物之誘引效果優異的系統。本發明之解決手段係一種組合物,其係含有選自包含對有害節足動物具有誘引性的化合物之群組的至少1種之化合物、及選自包含抗該有害節足動物的天敵之群組的至少1種之天敵而成之用以控制有害節足動物的行動之組合,而前述化合物與天敵係以相乘性地誘引前述有害節足動物的態樣被使用。
