Onion thrips (Onion thistle)

Japanese: ネギアザミウマ(葱薊馬) - ネギアザミウマ（英語表記）onion thrips

A tiny insect belonging to the Thripidae family of the order Thripidae. Its body length is 1.1-1.4 mm, and it is light yellowish brown to yellowish brown. Its antennae have seven segments, with the first segment being light yellow, the second, sixth and seventh segments being yellowish brown, and the third to fifth segments being light gray with a light base. It reproduces parthenogenetically, and males are rarely found. It is distributed all over the world, and can be found throughout Japan. It lives on the flowers and leaves of various crops such as onions, chrysanthemums, cucumbers, melons and tobacco, as well as other plants, and is known as an agricultural pest. It occurs throughout the year in greenhouses, but in the field it repeats 5-7 generations from spring to autumn, and it occurs most frequently during the hot and dry period of July and August.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

アザミウマ目アザミウマ科に属する微小な昆虫。体長は1.1～1.4mm，淡黄褐色～黄褐色。触角は7節で，第1節は淡黄色，第2節，第6,7節は黄褐色，第3～5節は淡灰色で基部は明るい。単為生殖を行い，雄はまれにしか発見されない。世界各地に分布し，日本全国で見られる。ネギ，キク，キュウリ，メロン，タバコなど農作物やその他各種植物の花上，葉上に生活し，農業害虫としても知られる。温室内では年中発生するが，野外では春から秋にかけて5～7世代を繰り返し，7,8月の高温で乾燥した時期にもっとも多く発生する。

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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