【目的】 为探究室内外两种不同温度模式对草地贪夜蛾Spodoptera frugiperda生长发育、存活、繁殖等生活史参数的影响。【方法】 研究了室内恒温（27.5 ℃）和室外自然变温（22-32 ℃）两种条件下的草地贪夜蛾两性种群生命表。【结果】  室内外相比，草地贪夜蛾的卵期和1龄幼虫历期无显著性差异；室内条件下2龄以后各龄幼虫发育历期、卵至成虫的发育历期以及成虫寿命要显著长于室外，室内条件下的种群存活率、化蛹率均显著高于室外，室内条件下雌性比例显著低于室外。室内和室外条件下平均世代周期分别为38.10 d和30.01 d，净增值率（R₀）分别为152.13和81.59，内禀增长率（r）分别为0.13和0.14，周限增长率（λ）分别为1.14和1.15。【结论】 在室内外不同温度模式下，室内恒温的草地贪夜蛾种群存活率更高，但室外变温条件下草地贪夜蛾的世代周期更短，繁殖力也更强，且雌性比例较大。本研究通过构建草地贪夜蛾种群生命表，揭示变温环境对该虫自然种群生长发育、存活和繁殖的影响，并为草地贪夜蛾的预测预警及其综合防治提供理论依据。

[Objectives]  To investigate the effects of a constant indoor, and a variable outdoor, temperature on life history parameters of Spodoptera frugiperda, including growth, development, survival and reproduction. [Methods]  Populations of S. frugiperda were kept at either a constant indoor temperature (27.5 ℃) or a naturally variable outdoor temperature (22-32 ℃) and life tables for each population compiled. [Results]  There was no significant difference in the duration of the egg stage or that of the first larval instar between the two populations. The larval period, the duration of development from egg to adult, and the adult lifespan after the second instar, were significantly longer in larvae kept indoors than in those kept outdoors. Larvae kept indoors also had significantly higher survival and pupation rates than those kept outdoors. Significantly fewer females were produced indoors than outdoors. The average generation periods under indoor and outdoor conditions were 38.10 and 30.01 d, respectively, the net value-added rates (R₀) were 152.13 and 81.59, the intrinsic growth rates (r) were 0.13 and 0.14, and the cycle-limited growth rates (λ) were 1.14 and 1.15. [Conclusion]  S. frugiperda kept at a constant temperature indoors had a higher survival rate than those exposed to naturally variable outdoor temperatures, but the generation time of the latter was shorter, its fecundity was higher, and the proportion of females produced was greater. Life tables can reveal the effects of variable vs constant temperature on the growth, survival and reproduction of S. frugiperda populations, providing a theoretical basis for obtaining early warning of outbreaks of this pest.