Cotton aphid - Cotton aphid

An insect belonging to the order Hemiptera, suborder Homoptera, family Aphididae. Body length is 1.0-1.2 mm. Wingless viviparous females come in a variety of body colors, including black, dark brown, blue-green, light green, and yellow, and are not shiny. The antennae consist of six segments, with the third segment being particularly long. The horn-shaped tube is short and cylindrical with a thin tip. The eggs overwinter on Rose of Sharon and Celastrus orbiculatus trees, and from spring they parasitize potatoes, eggplants, cucumbers, lilies, and chrysanthemums, and sexually reproduce on Rose of Sharon and cotton in November. Distributed worldwide. A major pest of horticultural plants, the colonies are large. They mainly parasitize the undersides of lower leaves near the ground surface.

[Masami Hayashi]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

昆虫綱半翅(はんし)目同翅亜目アブラムシ科Aphididaeに属する昆虫。体長1.0～1.2ミリ。無翅胎生雌は黒色、黒褐色、青緑色、淡緑色、黄色と体色はさまざまで、光沢はない。触角は六節からなり、第三節はとくに長い。角状管は短円筒形で先端は細い。ムクゲ、ツルウメモドキの樹上で卵越冬し、春季からジャガイモ、ナス、キュウリ、ユリ、キクなどに寄生し、11月ごろにムクゲやワタ上で有性生殖をする。世界中に分布。園芸植物の大害虫で、コロニーは大きい。おもに地表近くの下葉の裏に寄生する。

［林　正美］

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