PROBLEM TO BE SOLVED: To provide an insect proof instrument and the like that can be used regardless of plant cultivation places and can prevent damage by crawling insects.SOLUTION: An insect proof instrument 10 includes: an insect repellent storage part 1 capable of being mounted on the surface L1 of a culture medium L while surrounding the circumference of a root of a stem P1 of a plant P grown in the culture medium L and a ground insertion part 2 insertable in the culture medium L while being continuously arranged from the lower surface of the insect repellent storage part 1 toward the culture medium L and surrounding the circumference of the root R of the plant P. A portion including a central line of the insect repellent storage part 1 becomes a penetrating region 3 where an object can pass through toward a central line direction. The insect proof instrument 10 is mounted on the culture medium L in such a posture as the insect repellent storage part 1 surrounds the circumference of the cultivating plant P in the culture medium L. The ground insertion part 2 of the lower surface of insect repellent storage part 1 is inserted in the culture medium L, and then an insect repellent such as water W is put in the insect repellent storage part 1 before the instrument is used.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】植物の栽培場所を問わず使用することができ、這行虫類による被害を防止することができる防虫器具などを提供する。【解決手段】防虫器具10は、培地Lで育成される植物Pの茎P1の根元の周りを包囲する状態で、培地Lの表面L1上に載置可能な防虫剤収容部1と、防虫剤収容部1の下面から培地L中に向かって連設され植物Pの根Rの周りを包囲する状態で培地L中に挿入可能な地中挿入部2と、を備えている。防虫剤収容部1の中心線を含む部分は中心線方向に物体が通過可能な貫通領域3となっている。培地Lで栽培中の植物Pの周りを防虫剤収容部1が包囲するような姿勢で、防虫器具10を培地L上に載置し、防虫剤収容部1の下面の地中挿入部2を培地L中に挿入した後、防虫剤収容部1内に水Wなどの防虫剤を入れて使用する。【選択図】図3