摘  要  【目的】 为明确大豆食心虫Leguminivora glycinivorella越冬种群解除滞育的变化规律。【方法】 在实验室条件下，模拟大豆食心虫冬季滞育环境（温度：4 ℃，相对湿度：80%，L∶D=0∶24）和夏季解除滞育环境（温度：（26±1）℃，相对湿度：80%，L∶D=16∶8），观察并分析不同滞育持续时间大豆食心虫解除滞育后的存活、化蛹、羽化和被寄生等影响种群动态的参数。【结果】 不同滞育持续时间大豆食心虫的滞育强度无显著差异，解除滞育的平均时长为82 d；大豆食心虫滞育持续时间越长，活力越差，其中滞育168-224 d为大豆食心虫活力迅速下降的转折期，化蛹率由21.9%下降至1.9%，中位存活时间由77 d下降至35 d；不同滞育持续时间大豆食心虫的平均羽化时间为89 d，晚于其寄生天敌的60 d，二者解除滞育表现出一定的同步性。【结论】 大豆食心虫滞育幼虫在低温环境中会长期保持滞育，而在适宜环境中则维持一段滞育后能恢复发育并化蛹。这些特性将有利于预测大豆食心虫田间发生规律。

Abstract  [Objectives]  To investigate the population dynamics of the soybean pod borer (SPB) Leguminivora glycinivorella after diapause termination. [Methods]  Diapause (4 ℃, RH80%, L∶D=0∶24) and diapause termination [(26±1) ℃, RH80%, L∶D=16∶8] conditions were simulated in a laboratory and the effects of different diapause durations on the survival, pupation, eclosion and parasitism rate, were investigated. [Results]  Different diapause durations had no significant effect on the diapause intensity of SPBs; the average duration of diapause termination was 82 d. However, the longer the diapause duration, the less active SPBs became; 168 to 224 d of diapause was the duration required to produce a rapid decline in activity. Diapausing for this length of time caused the pupation rate to decrease from 21.9% to 1.9%, and the median survival time to decrease from 77 d to 35 d. The average emergence time of SPBs was 89 d compared to 60 d for their parasites, which indicates a degree of synchronization in diapause termination between parasites and host. [Conclusion]  At lower temperatures, SPB larvae can remain in diapause for a long time but under more suitable conditions larvae will develop and pupate after a shorter diapause period. These findings are helpful for predicting the frequency of occurrence of the SPB.