Wang Zhao, Zhu Huan, Jin Dao-Chao, Hou Jin-Ting, Liu Xia
College of Life and Health Science, Kaili University, Kaili, 556011, P. R. China.
Guizhou Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Institute of Entomology, Guizhou University, Guiyang, 550025, P. R. China.
Sci Rep. 2025 Jan 2;15(1):141. doi: 10.1038/s41598-024-84103-x.
The fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) is a major phytophagous pest that invaded China in late 2018, posing a serious threat to local agricultural production. Therefore, we investigated the effects of maize, soybean, and sweet potato on the growth, development, and reproduction of S. frugiperda under laboratory conditions. The developmental period of the egg-larval stage was significantly longer when S. frugiperda fed on sweet potato (28.94 days) compared to maize (16.19 days) and soybean (17.82 days). Sweet potato feeding significantly prolonged the pupal period, but this effect was not observed in the adult stage. Spodoptera frugiperda larvae fed on sweet potato had the lowest pupal weight (116.18 mg) and pupation rate (68.19%). The mean fecundity of females significantly differed among the plants, with egg production being highest for insects fed on maize (996.17 eggs) and lowest for those fed on sweet potato (319.28 eggs). Spodoptera frugiperda fed on sweet potato exhibited the smallest net reproductive rate (47.892), lowest intrinsic rate of increase (0.083 day), lowest finite rate of increase (1.086 day), and longest mean generation time (46.806 days). Overall, S. frugiperda can survive and complete its entire life cycle on all three host plants.
草地贪夜蛾Spodoptera frugiperda（鳞翅目：夜蛾科）是一种主要的植食性害虫，于2018年末侵入中国，对当地农业生产构成严重威胁。因此，我们在实验室条件下研究了玉米、大豆和甘薯对草地贪夜蛾生长、发育和繁殖的影响。与以玉米（16.19天）和大豆（17.82天）为食相比，草地贪夜蛾以甘薯为食时，卵-幼虫期的发育时间显著更长（28.94天）。取食甘薯显著延长了蛹期，但在成虫期未观察到这种影响。取食甘薯的草地贪夜蛾幼虫的蛹重最低（116.18毫克），化蛹率最低（68.19%）。不同植物上雌性的平均繁殖力存在显著差异，取食玉米时昆虫的产卵量最高（996.17粒卵），取食甘薯时最低（319.28粒卵）。取食甘薯的草地贪夜蛾的净增殖率最小（47.892），内禀增长率最低（0.083天），周限增长率最低（1.086天），平均世代时间最长（46.806天）。总体而言，草地贪夜蛾可以在这三种寄主植物上存活并完成其整个生命周期。
