【摘要】 褐飞虱饲养于不同水稻品种、不同生育期以及不同种群密度条件下，5龄若虫翅芽长度与成虫翅型具有稳定的相关性：翅芽长于1．10mm羽化后为长翅型雌虫，介于0．96～1．09mm之间为长翅型雄虫或短翅型雌虫，小于0．95mm为短翅型雄虫。根据5龄若虫翅芽长度结合外生殖器特征，编制了成虫翅型检索表。由此，可在5龄若虫期预测成虫的翅型和种群盛衰的趋势。更多还原

【Abstract】 Stable relations between the wingbud iength of 5th instar nymph and wing form of brown planthopper reared on different rice varieties and growth periods, and different densities have been found. The 5th-instar nymph with wingbud longer than 1.10mm emerge as female macropterous,with wingbud which is between 0.96 to 1.09mm emerge as male macropferous or female brachypterous, with wingbud shorter than 0.95mm emerge as male brachypterous. A key to adult wing form according to wingbud length and external genital characteristics of 5th-instar mymph is appended. From that, the wing form of adult and the tendency of population development can be forecasted in the 5th-instar nymph stage.更多还原