光周期对烟粉虱生长发育及繁殖的影响

Effect of Photoperiods on Development and Reproduction of the Bemisia tabaci

[目的]研究了光周期对扬州地区烟粉虱实验种群的影响。[方法]采自扬州郊区茄科蔬菜上的烟粉虱为供试虫源,选用扬州生产上常用的茄子品种扬茄一号为供试寄主,设置9个光周期处理研究了光周期对烟粉虱生长发育及繁殖的影响。[结果]光周期对烟粉虱种群增长影响显著。光照时间在0～21h,光照时间越长,烟粉虱的生长发育就越快,则世代历期就越短。世代发育速率表现为21L:3D>24L:0D>18L:6D>15L:9D>12L:12D>9L:15D>6L:18D>3L:21D>0L:24D。在24h光照条件下,种群增长指数最高,达109.80;光照时间在18h以上,6h以下,烟粉虱的发育历期显著增加;随着光周期的延长,烟粉虱子代性比、产卵量均呈线性回归。[结论]光周期的长短对烟粉虱种群增长、子代性比、成虫每雌的产卵量的影响很显著。

[Objective] The aim of the research was to study the effect of photoperiods on the experimental population of Bemisia tabaci.[Method] With the B.tabaci collected from solanaceous vegetable in suburb in Yangzhou city as tested insect resource and the eggplant variety Yangque 1 commonly used in production in Yangzhou as tested post,9 treatments of photoperiods were set up to study the effect of photoperiods on development and reproduction of the B.tabaci.[Result] The population of B.tabaci was influenced by the photoperiod significantly.In the light of 0～21 h,the longer the light time was,the quicker the development B.tabaci was and the shorter the generation duration was.The development rate of generation in B.tabaci showed 21L：3D 〉24L：0D 〉18L：6D 〉15L：9D 〉12L：12D 〉9L：15D 〉6L：18D 〉3L：21D 〉0L：24D.If the B.tabaci was in the light for 24 h per day the population increasing index was highest,reaching 109.80.If the B.tabaci was in light for over 18 h or below 6 h per day the development period of the B.tabaci in creased significantly.The sex ratio of progeny and oviposition amount per female were raised in linear relation with the prolonging of photoperiod.[Conclusion] The population increasing,sex ratio of progeny and oviposition amount per female were influenced by the photoperiod significantly.