This insect belongs to the Lepidoptera family, Pyralidae, and its larvae feed on dry foods such as stored grains, biscuits and other sweets, starch, and dried fruit inside houses (illustration). The larvae build nests from food and their own feces, live there and feed, and when they mature, they build cocoons in gaps in the room and pupate inside. They emerge about twice a year, and overwinter as mature larvae. The emergence of adults is not constant, but they appear from early summer to autumn, and during the day they rest on walls with their wings open, bending their abdomen backwards in an extremely peculiar position. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
鱗翅目メイガ科に属する昆虫で,幼虫が家屋内で貯蔵穀,ビスケットのような菓子類,デンプン,干果など乾燥食品を食害する(イラスト)。幼虫は食餌や自分の糞をつづって巣をつくり,その中にすんで食害するが,老熟すると室内の隙間などで繭をつくり,その中で蛹化(ようか)する。年に2回くらい発生し,老熟幼虫で越冬する。成虫の発生は一定していないが,初夏から秋にかけて出現し,昼間は壁面などに翅を開いて静止し,その際,腹部を背面に曲げて,きわめて特異な姿勢をしている。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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