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杨小舟蛾是近年来为害较严重的杨树食叶害虫之一.为探明该虫羽化及生殖行为的发生规律,为生态调控技术应用于其防治工作提供参考,本文在光周期L∶D=14∶10、温度(27±1)℃和相对湿度(60±10)%的条件下,研究了杨小舟蛾成虫的羽化、求偶、交配和产卵节律.结果表明:杨小舟蛾雌虫在蛹期7 d,雄虫在蛹期8 d达到羽化高峰;在昼夜24 h间,成虫的羽化主要集中在光期6 h至暗期2 h,雌虫羽化高峰期为光期11 h,雄虫较之晚1 h.雌蛾羽化后,只在暗期进行求偶,高峰期为暗期6~7 h;1~3 d雌蛾求偶率随日龄逐渐增加,3 d达69.8%,之后求偶率逐渐下降.在单对组中,雌、雄虫的交尾行为开始于暗期5 h,至暗期7~8 h达到高峰,而在多对组中,在暗期0.5 h就已出现交尾行为,高峰期较单对组晚1.5 h.1~3 d雌蛾产卵量占其总产卵量的68.4%,之后逐渐减少.
In order to find out the regularity of eclosion and reproductive behavior, this paper provides reference for the application of ecological control technology in its prevention and control work. In this paper, L: D = 14:10, temperature (27 ± 1) ℃ and relative humidity (60 ± 10)%, the fecundity, courtship, mating and ovipositional rhythms of adults of the larvae were studied.The results showed that: At pupal stage of 7 days, the male reached the peak of eclosion at pupal stage 8 days. During the 24 h day and night, the predation of adult was concentrated in 6 h of light to 2 h of darkness, and the females peaked at 11 h of light, The females were 1 h later than the late females, and the females only contracted in the dark period after the emergence of the female moths, with the peak period of 6-7 h. The odds ratios of female moths increased gradually with the increasing of age, After that, the odds of gradual decline of the odds ratio in the single pair group, female and male cross-mating behavior began in the dark period of 5 h, to the dark peak of 7 to 8 h peak, and in pairs of groups, in the dark period of 0.5 h The cross-hatching behavior occurred at 1.5 h after the peak at 1 h and 3 d after mating. The fecundity of females was 68.4% of the total fecundity, and then decreased gradually.