Kanzawa spider mite

A mite belonging to the Arthropoda phylum, Arachnida class, Acarina order, Tetranychidae family. Summer-type females are dark red, while diapausing females are vermilion. Females are about 0.4 mm long, while males are about 0.3 mm long. Their eggs are white and transparent. They parasitize a variety of plants, including tea, pears, peaches, apples, cherries, citrus fruits, persimmons, grapes, papayas, mulberries, hops, cassava, eggplant, soybeans, kidney beans, taro, strawberries, melons, rice, and corn. They are particularly important pests of tea, and in tea fields they occur twice a year, from March to June and September to December. They generally overwinter as diapausing females, but in the south they can also occur as summer-type females or in a developmental stage other than the adult stage. They are distributed throughout Japan, from Hokkaido to Okinawa.

[Mori Fansu]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

節足動物門クモ形綱ダニ目ハダニ科に属するダニ。夏型雌は暗赤色、休眠雌は朱色。体長は雌0.4ミリメートル内外、雄0.3ミリメートル内外。卵は白色透明。チャ、ナシ、モモ、リンゴ、オウトウ、柑橘(かんきつ)類、カキ、ブドウ、パパイヤ、クワ、ホップ、キャッサバ、ナス、ダイズ、インゲンマメ、サトイモ、イチゴ、ウリ類、イネ、トウモロコシなど、種々の植物に寄生する。とくにチャの重要害虫で、茶園では3～6月と9～12月の2回発生する山がある。越冬は一般に休眠雌によってなされるが、夏型雌あるいは南方では成虫態以外の発育ステージのこともある。北海道から沖縄まで日本全土に分布する。

［森　樊須］

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