【目的】 枸杞红瘿蚊Gephyraulus lycantha Jiao & Kolesik是枸杞生产中重发、频发的害虫，明确枸杞红瘿蚊成虫交尾行为及其相关的影响因素，为利用性信息素防控枸杞红瘿蚊提供理论基础。【方法】 在室内条件下，观察枸杞红瘿蚊成虫的交尾行为、交尾节律和多次交尾现象，并统计分析不同时龄及寄主植物对其交尾次数和交尾时长的影响。【结果】 枸杞红瘿蚊羽化后即可发生求偶和交尾，交尾行为包括避让、打斗和交尾3种，且雌雄成虫都具有搜寻和识别配偶的行为。成虫交尾具有明显的时辰动态节律，多集中于光期，在光期2 h（8：00）达到交尾高峰。枸杞红瘿蚊成虫的平均交尾时长为（32.49±1.67）s，大多集中在10.0-50.0 s时间段内。枸杞红瘿蚊雌雄成虫都存在多次交尾现象，雄虫更为明显。雄虫时龄变化对雌雄成虫的交尾次数影响较大，随着雄虫时龄的增加，交尾次数降低，而当雌雄成虫时龄同时变化时会对其交尾时长产生显著影响（P<0.05)。寄主植物对枸杞红瘿蚊成虫交尾行为无显著影响。【结论】 本研究揭示了枸杞红瘿蚊成虫交尾的行为特征、动态节律，明确了成虫时龄是影响其交尾的主要因素，从理论上证实了利用性信息素防治枸杞红瘿蚊的可行性和有效性。

 [Objectives]  To determine the factors that affect the mating behavior of the gall midge, Gephyraulus lycantha Jiao & Kolesik, a frequent and recurrent pest of Lycium barbarum, in order to provide information to develop techniques controlling of this pest with sex pheromones. [Methods]  The mating behavior of G. lycantha was studied under laboratory conditions and the effects of age and host plant species on mating frequency and duration were statistically analyzed. [Results] Adults generally begin courtship and mate immediately after emerging. Mating behavior has three aspects avoidance, fighting and mating. Both males and females search for, and identify, mates. Copulation has an obvious dynamic, hourly rhythm, which is mainly concentrated in the light phase of the photoperiod, peaking at 2 h (8:00) in the light phase.  The average mating duration of adults was (32.49±1.67) s, with most in the range of 10.0-50.0 s.  Multiple copulation occurred in both male and female adults, but was more common in males.  The frequency of mating by both sexes significantly decreased with age. Host plant species had no significant effect on mating behavior. [Conclusion]  Age is the main factor affecting mating in G. lycantha. These results indicate that it should be both feasible and effective to use sex pheromones to control this pest.