棉铃虫成虫不同性比结构对繁殖力的影响

目的]为棉铃虫的综合治理和预测预报提供依据和参考。方法]在室内将棉铃虫雌、雄蛾按单倍性比和双倍性比设置10个处理,研究棉铃虫成虫不同性比结构对繁殖力的影响。结果]随着性比结构中雄蛾比例的增加,产卵前期缩短,产卵期增长,雌蛾寿命延长,卵孵化率增加。不同性比结构下,单雌产卵量在786.6~922.6粒之间浮动。在同一性比结构中,卵孵化率随产卵时间的推移而增加,以产卵高峰日为最高。同一性比结构不同倍比相比,单倍性比处理的卵孵化率相对较高。结论]不同性比结构对棉铃虫成虫的产卵前期、产卵期、成虫寿命、产卵量和卵孵化率都有一定的影响。

Effects of Different Sex Ratio Structures of Helicoverpa armigera Adults on Fecundity

Objective] The study aimed to provide foundation and reference for comprehensive control and forecast of Helicoverpa armigera.Method] Ten treatments of female and male H.armigera moths were set up according to single and double sex ratios in the laboratory so as to study the effects of different sex ratio structures of H.armigera adults on fecundity.Result] As the proportion of male moths in the sex ratio structure increased,the pre-oviposition period shortened,the oviposition period extended,the life-span of female moth extended and the hatching rate of eggs increased.Under different sex ratio structures,the oviposition amounts per female fluctuated in 786.6～922.6 eggs.Under the same sex ratio structure,the hatching rate of eggs increased along with the lapse of oviposition time and was highest on the day of ovipostion peak.Under the same sex ratio structure with different time ratios,the hatching rate of eggs in the treatment of single sex ratio was relatively higher.Conclusion] Different sex ratio structures had some effects on the pre-oviposition period,oviposition period,adult life-span,oviposition amount and hatching rate of eggs of H.armigera adults.