PROBLEM TO BE SOLVED: To solve problems in which most of conventional anesthetics for insects (organic chemicals) are harmful to a human body and are necessary to set appropriate conditions for each of insect species, also the carbon dioxide therapy being frequently used has drawbacks such as having a place of use limitation because an anesthesia time is short and special facilities and devices are required.SOLUTION: A behavior inhibitor is provided that is an external application agent simply available at every place to a wide range of terrestrial invertebrate species without using a special device and container, in which a highly safe specific natural plant essential oil component is assumed as active ingredients.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】従来の昆虫用麻酔剤の多く(有機薬品類)は人体に有害な上に、昆虫種ごとに適切な条件を設定する必要が有った。また汎用される炭酸ガス麻酔は、麻酔時間が短く、特別な設備や装置を必要とするため使用場所の制約を受ける、などの難点が有った。【解決手段】安全性の高い特定の天然植物精油成分を有効成分とし、特別な装置や容器を用いることなく、広範囲の陸生無脊椎動物種に対して、あらゆる場所で簡便に使用可能な外用塗布剤である行動抑制剤を提供する。【選択図】なし