【目的】 为评估食蚜瘿蚊Aphidoletes aphidimyza滞育对其子代捕食豌豆修尾蚜Megoura crassicauda能力的影响。【方法】 本研究在室内条件下，系统研究了食蚜瘿蚊滞育解除后与非滞育处理后的子代3龄幼虫，在饥饿12 h后对不同龄期豌豆修尾蚜的捕食功能反应、搜寻效应、种内干扰及捕食偏好性。【结果】 滞育解除后的食蚜瘿蚊子代3龄幼虫日捕食量略高于非滞育组，但差异不显著（P = 0.730）。两处理组对豌豆修尾蚜的捕食功能反应均符合HollingⅡ型模型，且均表现对豌豆修尾蚜1-2龄若蚜捕食能力最强。随着豌豆修尾蚜密度的增加，食蚜瘿蚊子代3龄幼虫的搜寻效应降低，尽管滞育解除组的搜寻效应略高于非滞育组，但差异同样未达显著水平（1-2龄：P = 0.577；3龄：P = 0.665；4龄：P = 0.678）。此外，两处理组食蚜瘿蚊的单头捕食量均随其自身密度增加而下降，而分摊竞争强度则均随其自身密度的增加而上升。滞育并未改变食蚜瘿蚊对豌豆修尾蚜的捕食偏好性，两者均偏好捕食1-2龄若蚜，选择系数Q分别为1.35和1.39。【结论】 滞育在一定程度上增强了食蚜瘿蚊对豌豆修尾蚜的捕食能力，表明解除滞育后的食蚜瘿蚊在防治豌豆修尾蚜方面具有较高的应用潜力。本研究不仅为食蚜瘿蚊在生物防治中的实际应用提供了重要理论依据，同时也为深入研究食蚜瘿蚊的滞育机制奠定了研究基础。

[Aim]  To evaluate the effect of diapause in Aphidoletes aphidimyza on the ability of larvae to prey on Megoura crassicauda. [Methods]  Third instar larvae were randomly assigned to either a diapause termination, or non-diapause treatment, groups, after which their functional response, search efficiency, intraspecific interference, and predation preferences were systematically investigated under laboratory conditions. Larvae were starved for 12 h before being exposed to different instars of M. crassicauda. [Results]  The daily predation rate of 3rd instar larvae after diapause termination was slightly higher than that of the non-diapause group, but this difference was not significant (P = 0.730). The predation functional response of both treatment groups on M. crassicauda fitted the Holling TypeⅡmodel, and both exhibited the strongest predation on 1st and 2nd instar nymphs of M. crassicauda. As the density of M. crassicauda increased, the search efficiency of 3rd instar larvae after diapause termination was slightly higher than that of non-diapause larvae, but this difference was not significant (1st and 2nd instar: P = 0.577; 3rd instar: P = 0.665; 4th instar: P = 0.678). Furthermore, the predation rate of larvae decreased with increasing density. The predation rate of the diapause termination group was slightly higher than that of the non-diapause group, but this difference was not significant. Diapause did not alter the prey preferences of larvae towards M. crassicauda, larvae from both treatment groups preferred to prey on 1st and 2nd instar nymphs with respective preference coefficients (Q) of 1.35 and 1.39. [Conclusion]  Diapause somewhat enhanced the predatory capacity of A. aphidimyza larvae with respect to M. crassicauda, indicating that post-diapause larvae may be more effective predators of M. crassicauda. This study not only provides an important theoretical basis for using A. aphidimyza as biological control, but also lays a foundation for further exploration of its diapause mechanism.