Institute of Entomology, Guizhou University, Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Huaxi District, Guiyang, Guizhou Province, P. R.China.
Centre for Biodiversity and Biosecurity, School of Biological Sciences, University of Auckland, Auckland, New Zealand.
J Econ Entomol. 2018 Aug 3;111(4):1650-1657. doi: 10.1093/jee/toy108.
A pheromone-mediated mating disruption is a vital tool in the management of insect population dynamics that not only prevents mating but also delays mating in the target insect. Here, we examined the effect of delayed mating on the longevity and reproductive performance of the global pest, Spodoptera litura Fabricius (Lepidoptera: Noctuidae). Delayed mating was imposed on both sexes simultaneously, males only, and females only. The results showed that a 30-40% reduction in the successful mating rate of S. litura was caused by 7-d delay in mating. Increased mating ages of both sexes of S. litura resulted in a significant decrease in 3-d-old delayed mating, followed by an increase in mean duration of copulation. Furthermore, delayed mating had a significantly negative influence on the number of S. litura eggs produced. Mating delay imposed on both sexes simultaneously had a significantly greater effect on longevity and the number of eggs than when it was applied to either sex alone, and females were more severely affected by delayed mating than males in terms of longevity. Percentage of mating, fecundity, and female longevity were all significantly correlated with the number of days delayed mating. However, the hatching rate of eggs was not significantly affected by an increased delay in mating. Overall, our results indicated that delayed mating in both females and males drastically reduced the females' reproductive output, which itself was affected more by increasing the age at mating of females than males.
信息素介导的交配干扰是昆虫种群动态管理的重要工具，它不仅可以阻止交配，还可以延迟目标昆虫的交配。在这里，我们研究了交配延迟对全球害虫斜纹夜蛾（鳞翅目：夜蛾科）寿命和繁殖性能的影响。同时延迟雌雄交配、仅延迟雄性交配和仅延迟雌性交配。结果表明，斜纹夜蛾的成功交配率降低 30-40%是由于交配延迟 7 天所致。斜纹夜蛾雌雄交配年龄的增加导致 3 天龄延迟交配显著减少，随后交配持续时间显著增加。此外，延迟交配对斜纹夜蛾产卵数量有显著的负面影响。雌雄同时延迟交配对寿命和产卵数的影响明显大于仅对任一一性延迟交配的影响，而且从寿命方面来看，雌性比雄性受延迟交配的影响更大。交配延迟的百分率、生育力和雌性寿命都与延迟交配的天数显著相关。然而，卵的孵化率不受交配延迟增加的显著影响。总的来说，我们的研究结果表明，雌雄同时延迟交配大大降低了雌性的繁殖输出，而增加雌性的交配年龄对雌性的影响大于雄性。
