PROBLEM TO BE SOLVED: To provide a method for maintaining the population of a natural enemy organism effective for controlling insect pests by using a device for maintaining or proliferating the population of the natural enemy organism, and for protecting the natural enemy organism from the external environment such as wind and rain, high-pressure spraying of agricultural chemicals, etc., and controlling insect pests by the natural enemy organism.SOLUTION: There is provided a method in which a device including a base material having a fine gap structure or pores, a water-retaining material having moisture-releasing properties, and a waterproof member is installed in a crop cultivation field, and using a natural enemy organism in the device, insect pests are controlled.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】天敵生物の個体数を維持又は増殖させ、かつ、風雨や農薬の高圧散布などの外部環境から天敵生物を保護するための装置を利用して、害虫の防除に有効な天敵生物の個体数を維持し、当該天敵生物により害虫を防除する方法を提供する。【解決手段】 微小な間隙構造又は細孔を有する基材、放湿性の保水材、及び防水部材を含む装置を作物栽培圃場に設置し、当該装置中に備えた天敵生物を用いて害虫を防除する方法。【選択図】なし
