褐飞虱求偶鸣声中有效声段及其特征

对褐飞虱Nilaparvata lugens (Stal) 雌、雄虫播放求偶鸣声信号的不同声段及其组合，结果表明在它们求偶识别过程中，由多个规则连续的声脉冲所组成的声段是有效的。播放不同声脉冲重复频率和主振频率组合的模拟信号，表明褐飞虱雌、雄虫求偶信号的声脉冲重复频率是它们识别异性的敏感声学特征参数,其敏感范围较窄，分别为70～90 Hz和22 Hz左右；而对主振频率的敏感范围较宽，分别为200 ～1 700 Hz和100～300 Hz。

Effective sections and sensitive characters of courtship signals in the rice brown planthopper, Nilaparvata lugens (St(a)l)

Different sections of courtship signals and their combinations in the rice brown planthopper Nilaparvata lugens (Stal) were played back. Synthesized signals with different pulse repetition frequencies and main vibration frequencies were presented to the rice brown planthoppers. The results showed that the acoustic sections consisted of regular and continuous multi-pulses were effective in planthopper mating recognition. The pulse repetition frequency was an important sensitive signal character in planthopper mating choice. The sensitive ranges of pulse repetition frequency were narrow, 70－90 Hz for the female and about 22 Hz for the male; but the sensitive ranges of their main vibration frequency were wide, 200－1 700 Hz for the female and 100－300 Hz for the male.