【目的】 针对田间多种天敌和多个虫态共存的情况，定量分析天敌的捕食当量关系，明确田间天敌群落对害虫的实际控制能力，为制定害虫生态防控策略与技术奠定基础。【方法】 通过检索天敌捕食功能反应相关文献，获取常见捕食性天敌对蚜虫的日捕食量数据，构建捕食当量关系式，并确定捕食当量系数；结合小麦和功能植物蛇床草Cnidium monnieri上天敌与麦蚜的实地调查数据，基于当量关系式计算多种天敌共同捕食麦蚜的理论数值，并将该理论值与实际麦蚜发生量进行比较，以评估麦田天敌群落对麦蚜的控害效能。【结果】 捕食当量关系式能有效地整合田间多种天敌、多个虫态的捕食量，构建一个统一的当量关系式，为评估田间天敌群落对麦蚜的捕食作用提供了有效工具；由此分析鲁东麦田的天敌控害作用，并模拟功能植物蛇床草1∶30伴生种植小麦，显示当蛇床草上涵养15头/m²天敌时，按每667 m²麦田22 m²蛇床草计算，麦田天敌群落可取食麦蚜数量达57 684头/667 m²，当麦蚜实际发生量低于此值时，天敌可有效控制麦田蚜虫的为害。【结论】 捕食当量关系式= QUOTE 为量化田间天敌群落对麦蚜的捕食能力提供了有效工具，有助于掌握田间天敌群落对害虫的实际控制能力，将为麦田天敌利用及其蚜虫生态防控提供决策支持。

 [Aim]  In response to the coexistence of multiple natural enemies and various insect stages in the field, a quantitative analysis of the predation equivalence among natural enemies is conducted to clarify their control efficacy against pests. This study aims to lay the foundation for developing ecological pest management strategies and technologies. [Methods]  By reviewing literature on the functional responses of natural enemies in predation, data on the daily predation rates of common predatory natural enemies on aphids were collected to construct a predation equivalent relationship and determine the predation equivalent coefficient. Combined with field survey data of natural enemies and wheat aphids on wheat and the functional plant Cnidium monnieri, the theoretical values of multiple natural enemies co-predating on wheat aphids were calculated based on the equivalent relationship. These theoretical values were then compared with the actual occurrence of wheat aphids to assess the control efficacy of the natural enemy community in wheat fields against wheat aphids. [Results]  The predation equivalent equation effectively integrates the predatory capacity of multiple natural enemy species and their various developmental stages in the field, establishing a unified quantitative model. This provides a practical tool for evaluating the predation effect of natural enemy communities on wheat fields. Based on this, the pest control efficiency of natural enemies in wheat fields of eastern Shandong was analyzed. A simulation of functional plant C. monnieri intercropped with wheat at a 1︰30 ratio demonstrated that when C. monnieri sustains a natural enemy density of 15 individuals/ m², the natural enemy communities in the wheat field can consume up to 57 684 wheat aphids per 667 m² (calculated as 22 m² of C. monnieri per 667 m² wheat field). When the actual aphid population falls below this threshold,

natural enemies can effectively suppress wheat aphid damage. [Conclusion]  The predation equivalent equation= QUOTE  

serves as a robust tool for quantifying the aphid-predation capacity of field natural enemy communities, aiding in the assessment of their practical pest control potential. This approach will provide decision-making support for utilizing natural enemies in wheat fields and advancing ecological aphid management strategies.