The codling moth Cydia pomonella (L.) (Lepidoptera: Tortricidae) is one of the key pests of pome fruit and walnut in almost all growing regions of the world and has developed resistance to several insecticides. In this study, the susceptibilities of 15 codling moth populations to emamectin benzoate and 9 populations to lambda cyhalothrin collected in five European countries were measured by standard diet incorporation bioassays. Variation in susceptibility was observed among populations, with LC₅₀ values ranging from 0.0017 to 0.0119 mg a.i./kg diet for emamectin benzoate and from 0.033 to 0.292 mg a.i./kg diet for lambda cyhalothrin. Our results revealed only small variations in emamectin benzoate susceptibility between populations, indicating no selection of resistance to this active ingredient. Even though a wider range of responses was detected for lambda cyhalothrin, our results also suggest that populations remain susceptible to this insecticide. Based on pooled LC₉₅ evaluations, we propose the use of concentrations 0.02 mg a.i./kg of diet for emamectin benzoate and 0.60 mg a.i./kg of diet for lambda cyhalothrin in order to discriminate between resistant and susceptible individuals.

苹果蠹蛾Cydia pomonella (L.) (Lepidoptera: Tortricidae) 是世界上几乎所有种植区的梨果和核桃的主要害虫之一，并且对几种杀虫剂产生了抗药性。在这项研究中，通过标准饮食掺入生物测定法测量了在五个欧洲国家收集的 15 个苹果蠹种群对甲维菌素苯甲酸酯和 9 个种群对高效氯氟氰菊酯的敏感性。在人群中观察到易感性的差异，LC ₅₀甲维苯甲酸酯的数值范围为 0.0017 至 0.0119 mg ai/kg 饮食，λ 三氯氟氰菊酯的数值范围为 0.033 至 0.292 mg ai/kg 饮食。我们的研究结果表明，不同人群之间甲维菌素苯甲酸酯敏感性的差异很小，表明没有选择对这种活性成分的抗性。尽管检测到高效氯氟氰菊酯的反应范围更广，但我们的结果也表明，人群仍然对这种杀虫剂敏感。基于汇总的 LC ₉₅评估，我们建议使用浓度为 0.02 mg ai/kg 饮食的阿维菌素苯甲酸盐和 0.60 mg ai/kg 饮食的 λ 三氟氯氰菊酯，以区分耐药个体和易感个体。