【目的】 明确江西省南昌地区草地贪夜蛾Spodoptera frugiperda和亚洲玉米螟Ostrinia furnacalis在秋玉米上的发生动态，并比较不同类型诱捕器对成虫的诱集效果。【方法】 2021-2022年在南昌秋玉米上，采用性诱剂诱捕法调查草地贪夜蛾和亚洲玉米螟成虫发生动态，采用“W”型5点取样法调查草地贪夜蛾和亚洲玉米螟幼虫的发生情况。【结果】 2021年，草地贪夜蛾幼虫的第一个虫量高峰出现在玉米小喇叭口期，第二个高峰出现在抽雄期；诱捕器的诱蛾量呈现两个明显的峰值，且基本与田间幼虫动态一致，峰期相对滞后约1周；2022年，幼虫高峰期出现在玉米拔节期至小喇叭口期，锥桶型诱捕器和桶型诱捕器的诱蛾量分别在大喇叭口期和抽雄期出现高峰。亚洲玉米螟的动态在2021-2022年均表现为两个明显的峰期，2021年，幼虫虫量高峰出现在拔节期和抽雄期，成虫诱蛾量高峰出现在拔节期和开花期；2022年，幼虫高峰出现在小喇叭口期和开花期，诱蛾量高峰出现在大喇叭口期和抽丝期。诱集效果分析表明，除2021年草地贪夜蛾总诱蛾量外，锥桶型诱捕器的总诱蛾量和周均诱蛾量显著高于桶型诱捕器（P<0.05），且回归分析表明两种害虫的田间幼虫数量均与下一周两种诱捕器诱集到的成虫数量呈极显著的正相关（P<0.01）。【结论】 在江西南昌地区的秋玉米上，草地贪夜蛾幼虫的高峰期通常出现在喇叭口期和抽雄期，建议此时期重点监测成虫动态并开展幼虫防治；亚洲玉米螟幼虫的两个高峰期分别出现在喇叭口期至拔节期或开花期之间，应从喇叭口期开始加强亚洲玉米螟幼虫防治并开展成虫监测，后续重点关注第一个高峰期后的3-5周内虫情变化。建议使用锥桶型诱捕器进行草地贪夜蛾和亚洲玉米螟的防治及成虫动态监测。

[Aim]  To clarify the population dynamics of the moths Spodoptera frugiperda and Ostrinia furnacalis on autumn maize crops in Nanchang, Jiangxi Province, and compare the effectiveness of two, different, pheromone traps for adult moths. [Methods] A "W"-shaped five-point sampling method was used to investigate the occurrence of S. frugiperda and O. furnacalis larvae on autumn maize in Nanchang in 2021 and 2022. The performance of tapered and barrel-shaped sex pheromone traps was also compared in the field. [Results]  In 2021, the first peak of the S. frugiperda larval population occurred during the small tassel stage, and the second peak appeared during the tasseling stage. There were also two distinct peaks of adult moth captures in pheromone traps that generally corresponded to larval population dynamics, but occurred about one week later. In 2022, the larval peak occurred from the jointing to the small tassel stage. Captures in tapered and barrel traps peaked during the big tassel and tasseling stages, respectively. The population dynamics of O. furnacalis also exhibited two distinct peaks in both 2021 and 2022. In 2021, the larval population peaked during the jointing and tasseling stages, while the peak of adult moth captures occurred during the jointing and flowering stages. In 2022, the larval peak occurred during the small tassel and flowering stages, but the adult peak occurred during the big tassel and silking stages. Tapered traps significantly outperformed barrel traps in terms of both total moth catch and weekly average catch (P<0.05). A regression analysis revealed a highly significant, positive, correlation between the larval abundance of each species and the number of adults captured the following week (P<0.01). [Conclusion]  The peak of S. frugiperda larval abundance typically occurs during the tasseling and silking stages in autumn maize fields in Nanchang, Jiangxi. Growers should focus on monitoring adult moth dynamics and implementing larval control measures during these periods. Peak O. furnacalis larval abundance occurs between the tasseling and jointing stages, as well as between the flowering and silking stages. Therefore, control measures for this pest, together with continuous monitoring of adult moths, should begin in the tasseling stage. Growers should be vigilant for changes in pest population levels 3-5 weeks after the first peak. The use of cone-shaped traps is recommended for both S. frugiperda and O. furnacalis control, as well as for monitoring adult moth abundance.