The sterile insect technique is a new approach for the integrated management of Drosophila suzukii Matsumura (Diptera: Drosophilidae), an invasive pest in North America. We evaluated, under laboratory conditions, the mating capacities and success of male D. suzukii, irradiated at a dose of 120 Gy, with and without competition. We also explored the tendency of females to remate depending if their first mate was irradiated or not. We observed that irradiated males have the same mating capacity as control males, copulating with, respectively, 6.4 ± 1.9 females versus 6.9 ± 2.0 females in a 24-hour period. Irradiated males won the competition 37.5% of times, which is not significantly different from competiveness of control males. Female remating can be considered infrequent and not significantly influenced by male treatment: 7.4% of the females first mated with control males and 18.8% of the females first mated with irradiated males remated when given the opportunity two days and four days after the first mating. Latency before mating and mating duration were not significantly influenced by male treatment, but by presence of male competition. Overall, irradiated males thus seem to be as performant as control males, which is an important condition for a successful sterile insect technique programme.

昆虫不育技术是一种综合治理北美果蝇（Drosophila suzukii Matsumura）（双翅目：Drosophilidae）的新方法。我们在实验室条件下评估了雄性铃木D.的交配能力和成功率，在有无竞争的情况下以120 Gy的剂量辐照。我们还探讨了雌性交配的倾向，这取决于雌性是否受到照射。我们观察到，受辐照的雄性与对照雄性具有相同的交配能力，在24小时内分别交配6.4±1.9雌性和6.9±2.0雌性。接受辐照的男性赢得了比赛的37.5％的时间，与对照组男性的竞争能力没有显着差异。雌性交配很少，并且不受男性治疗的影响不大：如果有第一次交配后两天和四天的机会，则有7.4％的雌性首次与对照雄性交配，而有18.8％的雌性首次与辐射雄性交配。男性治疗对交配前的潜伏期和交配时间没有显着影响，但由于存在男性竞争。因此，总体而言，受辐照的雄性似乎与对照雄性一样，这是成功的不育昆虫技术计划的重要条件。