Gerken Alison R, Campbell James F
Agricultural Research Service Center for Grain and Animal Health Research USDA Manhattan KS USA.
Ecol Evol. 2018 Jan 29;8(5):2428-2439. doi: 10.1002/ece3.3865. eCollection 2018 Mar.
Controlling postharvest pest species is a costly process with insecticide resistance and species-specific control requiring multiple tactics. Mating disruption (MD) can be used to both decrease a female's access to males and delay timing of mating and decreases overall mating success in a population and population growth rate. Development of new commercially available MD products requires an understanding of life history parameters associated with mating delay. These can provide information for targeting proportions of reproducing individuals using MD. After delaying mating for females of two closely related beetle species, and , we surveyed survivorship, number of eggs laid, and number of progeny emerged. With increases in mating age, total number of eggs laid and total number of progeny emerged significantly declined over time. typically had greater numbers of eggs laid and progeny emerged compared to as female age at mating increased, suggesting that may be more resistant to long-term delays in mating. Life span showed an increase as mating age increased but life span significantly decreased almost immediately following mating. Simulations depicting multiple distributions of mating within a population suggest that in a closed population, high levels of mating delay significantly reduced reproductive growth rates. Although reproductive growth rates were decreased with increased mating age, they are still large enough to maintain populations. This study highlights the differences in life history between two closely related species, suggesting that outperforms over the course of a life span, but has better reproductive capabilities early in life. MD may also be a viable component of a pest management system for these two species as it significantly decreased overall reproductive output and population growth.
控制采后害虫种类是一个成本高昂的过程，因为存在杀虫剂抗性问题，且针对特定物种的控制需要多种策略。交配干扰（MD）可用于减少雌性与雄性接触的机会、延迟交配时间，并降低种群中的总体交配成功率和种群增长率。开发新的商用交配干扰产品需要了解与交配延迟相关的生活史参数。这些参数可为确定使用交配干扰技术的繁殖个体比例提供信息。在延迟两种近缘甲虫物种（ 和 ）的雌性交配后，我们调查了其存活率、产卵数量和羽化后代数量。随着交配年龄的增加，产卵总数和羽化后代总数随时间显著下降。与 相比，随着雌性交配年龄的增加， 通常产卵数量更多且羽化后代数量更多，这表明 可能对长期交配延迟更具抗性。寿命随着交配年龄的增加而增加，但在交配后几乎立即显著下降。描述种群内多种交配分布的模拟结果表明，在封闭种群中，高水平的交配延迟会显著降低生殖增长率。尽管生殖增长率随着交配年龄的增加而下降，但仍足以维持种群数量。本研究突出了两种近缘物种在生活史上的差异，表明在整个寿命周期中 比 表现更好，但 在生命早期具有更好的繁殖能力。交配干扰对于这两个物种的害虫管理系统而言也可能是一个可行的组成部分，因为它显著降低了总体生殖产出和种群增长。
