PROBLEM TO BE SOLVED: To provide an insect pest control instrument which can maintain the efficacy of insect pest prevention over a long period entirely without an insecticide comprising a chemical substance.SOLUTION: The insect pest control instrument utilizes the habits of caterpillars. The fixing portion 3 of the control instrument 1 is fixed to the trunk of a tree to prevent the caterpillars from crawling up on the tree, thereby preventing the damages of the early fruits, sprouts and leaves of the fruit tree by the insect pests.COPYRIGHT: (C)2012,JPO&INPIT【課題】化学物質による薬品を全く使用しないで、長期に渡って害虫防除の効力が維持される防除器の提供。【解決手段】毛虫の習性を利用することによって、樹木の幹を防除器1の固定部分3を固定し、毛虫が樹木に這い上がるのを防止し、果樹の初期の果実や新芽、葉の害虫による被害を防ぐ。【選択図】図1