摘  要  【目的】 明确南方小花蝽Orius strigicollis和六斑月瓢虫Cheilomenes sexmaculata对马铃薯上3种传毒媒介昆虫西花蓟马Frankliniella occidentalis、烟蚜Myzus persicae和马铃薯长管蚜Macrosiphum euphorbiae的生物防控潜能。【方法】 在室内测定南方小花蝽与六斑月瓢虫雌成虫对3种猎物若虫和成虫的捕食功能反应、天敌自身密度对其捕食作用的影响，以及笼罩条件下释放单一天敌与联合释放天敌组合对3种媒介昆虫的防控效果。【结果】 南方小花蝽与六斑月瓢虫对3种猎物的捕食功能反应均符合HollingⅡ 模型。南方小花蝽对3种媒介昆虫成虫日最大捕食量分别为66.23、36.90和49.26头/d，六斑月瓢虫对3种媒介昆虫成虫的日最大捕食量分别为312.50、153.85和263.16头/d，且2种天敌昆虫对媒介昆虫若虫的日最大捕食量均大于成虫。南方小花蝽对3种媒介昆虫的干扰系数分别为0.25、0.11和0.19，六斑月瓢虫对3种媒介昆虫的干扰系数分别为0.07、0.06和0.05。笼罩条件下，与不释放天敌的空白对照相比，不同处理天敌昆虫释放16 d后，3种媒介昆虫的虫口数量均得到了有效控制。其中，南方小花蝽和六斑月瓢虫联合释放，对蓟马和蚜虫均具有较好的防控效果。【结论】 南方小花蝽与六斑月瓢虫对马铃薯上3种害虫均具有良好的防控潜能，两种天敌昆虫联合释放防控马铃薯媒介昆虫防效更好。

Abstract  [Aim]  To determine the effectiveness of using Orius strigicollis, in combination with Cheilomenes sexmaculata, as biological controls for three important insect potato disease vectors, Frankliniella occidentalis, Myzus persicae and Macrosiphum euphorbiae. [Methods]  The functional response of O. strigicollis and C. sexmaculata was measured, as was the predation rate of each species at different population densities. Finally, the effectiveness of releasing either O. strigicollis, C. sexmaculata, or both species together, was determined in indoor experiments. [Results]  The predatory functional responses of both species to all three insect pests were consistent with the HollingⅡ functional response model. The predation number of O. strigicollis to F. occidentalis, M. persicae and M. euphorbiae was 66.23, 36.90 and 49.26, respectively, whereas that of C. sexmaculata was 312.50, 153.85 and 263.16, respectively. Both O. strigicollis and C. sexmaculata had a greater predatory capacity for nymphal instars of the three pest species than they did for adults of these species. The interference coefficients of O. strigicollis with respect to F. occidentalis, M. persicae and M. euphorbiae were 0.25, 0.11 and 0.19, respectively, whereas those of C. sexmaculata were 0.07, 0.06 and 0.05, respectively. Compared to the control (no natural enemies), releasing either O. strigicollis, C. sexmaculata, or a combination of these species, effectively controlled all three pests after 16 d. [Conclusion]  Releasing both predator species may have been more effective for controlling thrips and aphids. Releasing both O. strigicollis and C. sexmaculata has the potential to effectively control three species of insect potato disease vectors.