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杨小舟蛾的羽化和生殖行为节律

陈琳,王广利+,魏洪义**   

  1. (江西农业大学农学院, 南昌 330045)
  • 出版日期:2014-08-18 发布日期:2014-08-18

Circadian rhythm of emergence and reproduction of Micromelalopha troglodyta (Lepidoptera: Notodontidae).

CHEN Lin, WANG Guang-li, WEI Hong-yi   

  1. (College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China)
  • Online:2014-08-18 Published:2014-08-18

摘要:

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.
 

Abstract: Micromelalopha troglodyta (Graeser) is one of serious defoliators of poplars. In order to explore the occurrence regularity of emergence and reproductive behavior of M. troglodyte, which could provide references to the application of ecological control techniques, the circadian rhythms of emergence, calling, mating and oviposition were studied at (27±1) ℃ and (60±10)% RH under a 14L:10D photoperiod. The results showed that the emergence peak of the female occurred at the 7th day of the pupal stage, while the male at 8th day. As for the circadian rhythm during 24 hours, most individuals of both sexes emerged from the 6th hour of the photophase to the 2th hour of the scotophase. The 11th hour after initiation of the photophase was the emergence peak of female, while that of the male was 1 hour later. Female M. troglodyte after emergence did not call until the scotophase. The calling percentage reached the peak at the 6th-7th hour of the scotophase which increased with age of 1-3 days and reached 69.8% at the 3rd day, and then went down gradually. In the cage of only a pair of female and male, adults started mating after the 5th hour of the scotophase, and reached peak at the 7th-8th hour. But in the cage of multiple pairs of adult moths, they started mating after 0.5 hour of the scotophase, and the peak was 1.5 hours later than one pair’s. Eggs laid by females at the age of 1 to 3 days accounted for 68.4% of their total lifetime fecundity, and then the oviposition gradually reduced with the age.