Key Laboratory of Monitoring and Control of Tropical Agricultural and Forest Invasive Alien Pests, Ministry of Agriculture, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.
Pest Manag Sci. 2024 Mar;80(3):1533-1546. doi: 10.1002/ps.7887. Epub 2023 Nov 27.
Spodoptera frugiperda, a global agricultural pest, can be effectively controlled through the sterile insect technique. However, exposure to low-dose radiation below the sterilization threshold may induce hormetic effects. Here, the biphasic aspects of the fertile progeny population of S. frugiperda were analyzed using an age-stage, two-sex life table after dosing male and female pupae with 10-350 Gy gamma radiation.
The parental sterilizing dose for 6-day-old female and male pupae was 200 and 350 Gy, respectively. The total longevity, pre-adult survival rate, net reproduction rate, and intrinsic growth rate of the offspring population increased with decreasing radiation doses from 250 to 10 Gy. Offspring population of parents treated with low doses of 10-100 Gy showed better life table parameters compared to non-irradiated controls. Females and males fecundity irradiated with 10, 50, and 100 Gy and 10 Gy, respectively, exceeded controls, producing 2339.4, 2726.4, 2311, and 2369 eggs, as opposed to 1802.9 eggs produced by the controls. Males irradiated with 10 Gy displayed the highest intrinsic rates of increase and net reproduction rate, at 0.1709 and 682.3, respectively. Projections from the survival rate and fecundity indicated that female and male S. frugiperda populations after 10 Gy irradiation may grow considerably faster than the controls.
This study explores the hormetic effects of low-dose radiation on S. frugiperda through life table analysis, while providing enhancements for utilizing substerilizing gamma dose in a modified F sterility technique. © 2023 Society of Chemical Industry.
美洲棉铃象甲（Spodoptera frugiperda）是一种全球性农业害虫，可以通过不育昆虫技术有效地控制。然而，暴露在低于杀菌阈值的低剂量辐射下可能会引起激效作用。在这里，使用两性生命表分析了用 10-350Gyγ 射线照射雌雄蛹后 S. frugiperda 可育后代种群的两阶段特征。
6 日龄雌蛹和雄蛹的亲本杀菌剂量分别为 200Gy 和 350Gy。随着辐射剂量从 250Gy 降至 10Gy，后代种群的总寿命、成虫前存活率、净生殖率和内禀增长率增加。与未辐照对照相比，用 10-100Gy 低剂量处理的后代种群表现出更好的生命表参数。10、50 和 100Gy 以及 10Gy 辐照的雌、雄个体的繁殖力分别超过对照，产生 2339.4、2726.4、2311 和 2369 枚卵，而对照产生 1802.9 枚卵。10Gy 辐照的雄虫表现出最高的内禀增长率和净生殖率，分别为 0.1709 和 682.3。存活率和繁殖力的预测表明，辐照 10Gy 后 S. frugiperda 的雌、雄种群可能比对照增长得更快。
本研究通过生命表分析探讨了低剂量辐射对 S. frugiperda 的激效作用，同时为利用改良的 F 不育技术中的亚致死剂量γ射线提供了改进。© 2023 化学工业协会。
