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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Brown planthopper ： ウィキペディア英語版 Brown planthopper The brown planthopper (BPH), ''Nilaparvata lugens'' (Stål) (Hemiptera: Delphacidae) is a planthopper species that feeds on rice plants (''Oryza sativa'' L.). BPH are among the most important pests of rice, and rice is the major staple crop for about half the world's population. They damage rice directly through feeding and also by transmitting two viruses, rice ragged stunt virus and rice grassy stunt virus. Up to 60% yield loss is common in susceptible rice cultivars attacked by BPH. The BPH are distributed in: Australia, Bangladesh, Bhutan, Burma (Myanmaar), Cambodia, China, Fiji, India,〔Oudhia, P. "Traditional medicinal knowledge about green leafhopper, Nephotettix spp., in Chhattisgarh (India)." International Rice Research Notes 25.3 (2000).〕 Indonesia, Japan, North and South Korea, Laos, Malaysia, Nepal, Pakistan, Papua New Guinea, Philippines, Sri Lanka, Taiwan, Thailand, and Vietnam. Their host plant other than rice is ''Leersia hexandra''. == Biology == The brown plant hopper is dimorphic, with fully winged 'macropterous' and truncate-winged 'brachypterous' forms. The macropterous forms are potentially migrants and are responsible for colonizing new fields. After settling down on the rice plants, they produce the next generation in which most of the female insects develop as brachypters and males as macropters. Adults usually mate on the day of emergence, and the females start laying eggs from the day following mating. Brachypterous females lay 300 to 350 eggs, while macropterous females lay fewer eggs. The eggs are thrust in a straight line generally along the mid-region of the leaf sheath. Eggs hatch in about six to nine days. The newly hatched nymphs are cottony white, and turn purple brown with in an hour; they feed on plant sap. They undergo five instars to become adults. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Brown planthopper」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.