Turnip sawfly - Turnip sawfly

Japanese: カブラハバチ - かぶらはばち(英語表記)turnip sawfly
Turnip sawfly - Turnip sawfly

An insect belonging to the order Hymenoptera, family Tenthredinidae. The original species is widely distributed from Europe to the Korean Peninsula. It is about 7 mm long, with a black head and the back half of the thorax, orange-yellow otherwise, and dark wings. The larvae feed on plants of the Brassicaceae family, and can cause damage to radishes and turnips. The larvae grow to about 2 cm in length and are black velvety caterpillars called nano-chrome-mushi. They emerge five or six times a year, building cocoons in the soil in which they overwinter as pre-pupal bodies. Two other species of the same genus, the Japanese turnip sawfly and the black turnip sawfly, infest Brassicaceae vegetables; the former emerges twice a year, in spring and autumn, and the latter emerges five or six times.

[Teiichi Okutani]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

昆虫綱膜翅(まくし)目ハバチ科に属する昆虫。原種は広くヨーロッパから朝鮮半島まで分布する。体長約7ミリメートルで、頭と胸部の後半が黒く、ほかは橙黄(とうこう)色で、はねは暗色を帯びる。幼虫の食草はアブラナ科の植物で、ダイコン、カブなどに被害が出ることがある。幼虫は2センチメートル近くになり、黒いビロード状のイモムシで、ナノクロムシとよばれる。年5、6回発生し、土中に繭をつくり、その中で前蛹体(ぜんようたい)で越冬する。アブラナ科の野菜には本種と同属のニホンカブラハバチとセグロカブラハバチがつき、前者は春秋の2回発生、後者は5、6回発生する。

[奥谷禎一]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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