【目的】 明确亚致死浓度溴氰菊酯对天敌昆虫叉角厉蝽Eocanthecona furcellata的影响。【方法】 采用点滴法测定溴氰菊酯对天敌昆虫叉角厉蝽的毒力反应，并用溴氰菊酯亚致死浓度LC₁₀、LC₁₅和LC₂₀处理叉角厉蝽成虫，测定其F₁代的发育历期、繁殖力、存活率及雌、雄成虫的寿命等参数，并组建F₁代年龄-龄期两性生命表。【结果】 在F₁代中，经溴氰菊酯亚致死浓度处理后叉角厉蝽若虫发育历期缩短；雌成虫的平均单雌产卵量较对照组显著降低（P = 0.009），LC₁₀、LC₁₅和LC₂₀浓度分别降低了24.68%、29.04%和37.53%。此外，F₁代种群参数结果表明，LC₁₀、LC₁₅和LC₂₀浓度溴氰菊酯处理使叉角厉蝽平均世代周期（T）均显著缩短（P < 0.05），分别较空白对照组缩短3.19%、9.70%和9.40%，但内禀增长率（r）、周限增长率（λ）与净增殖率（R₀）各处理组较对照组无显著差异（P > 0.05）。【结论】 亚致死浓度溴氰菊酯会缩短叉角厉蝽后代的存活时间，同时也能显著抑制雌成虫的繁殖力，不利于叉角厉蝽后代种群发展。

[Aim]  To clarify the effects of sublethal concentrations of deltamethrin on the predatory insect Eocanthecona furcellata. [Methods]  The topical application method was used to determine the toxic response of E. furcellata to deltamethrin. Adults were treated with sublethal concentrations of deltamethrin (LC₁₀, LC₁₅, and LC₂₀), and the developmental duration, fecundity, survival rate, and the lifespan of female and male adults in the F₁ generation were measured. An age-stage life table was also constructed for each sex. [Results]  Exposure to sublethal concentrations of deltamethrin generally shortened the developmental duration of nymphs. Treatment with LC₁₀, LC₁₅, and LC₂₀ concentrations of deltamethrin significantly reduced female fecundity by 24.68%, 29.04%, and 37.53%, respectively, relative to the control group (P = 0.009). Treatment with the above concentrations of deltamethrin also significantly (P < 0.05) shortened the mean generation time (T), by 3.19%, 9.70%, and 9.40%, respectively, relative to the control group. However, deltamethrin did not cause any significant change to the intrinsic rate of increase (r), finite rate of increase (λ), and net reproductive rate (R₀), of treatment groups relative to the control (P > 0.05). [Conclusion]  Sublethal concentrations of deltamethrin both shortened the survival time of the E. furcellata F₁ generation, and significantly inhibited female fecundity, thereby reducing population growth.