PROBLEM TO BE SOLVED: To provide a protective device of natural enemy insects, the device that provides a habitat optimized based on the behavior of bait mites being the substitute bait of the natural enemy insects in terms of IPM, and maintains the growth of the bait mites for a long term, and thereby settlement properties of the natural enemy insects preying on the bait mites are improved for a long term.SOLUTION: A protective device of natural enemy insects is improved in settlement properties of the natural enemy insects by maintaining the growth of bait mites of the natural enemy insects for harmful insects. The protective device includes a bag-shaped or box-shaped body having a sealed space inside, and a storage disposed in the sealed space of the body and having the natural enemy insects and bait mites stored in a bag body so as to come in/out. The protective device of the natural enemy insects is configured as follows: an interval between an inner surface of the sealed space of the body opposed to each other and an outer surface of the storage is 3.0 mm or less more preferably, a member comprising water retention materials of the sustained release moisture is included in the sealed space the sealed space enables the natural enemy insects to come in/out of the outside water does not enter inside when the body is watered and the humidity can be maintained 70% or more and 30 days or more.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】IPMの見地から、天敵昆虫の代替餌である餌ダニの習性に基づき最適化された生息環境を提供し、餌ダニの長期間にわたる増殖維持を実現し、これにより餌ダニを捕食する天敵昆虫の定住性を長期間にわたって向上させた天敵昆虫の保護装置の提供。【解決手段】害虫の天敵昆虫の餌ダニの増殖を維持することで天敵昆虫の定住性を向上させた天敵昆虫の保護装置で、内部に密閉空間を有する袋状又は筐体状の本体部と、本体部の密閉空間に配設された、袋体内に天敵昆虫及び餌ダニが出入り可能に収容された収容部とを備え、互いに対向する、本体部の密閉空間の内側表面と、収容部の外側表面との間隔が3.0mm以下であり、さらに好適には、密閉空間に徐放湿性の保水材からなる部材を備え、密閉空間が、天敵昆虫が外部に出入り可能で、本体部に散水した場合に水が浸入せず、且つ、その湿度が70%以上に30日間以上維持可能に構成した天敵昆虫の保護装置。【選択図】図1
