【目的】 为有效防控重大入侵害虫番茄潜叶蛾Tuta absoluta，指导田间科学用药，延缓抗药性的发展。【方法】 在室内采用浸叶法，测定了2023-2024年山西省太谷、芮城和阳高3个地区番茄潜叶蛾种群对7种杀虫剂的敏感性，并以新疆番茄潜叶蛾室内种群对不同杀虫剂的敏感性作为敏感基线，评估3个田间种群产生抗性的可能性。【结果】 敏感性测定结果表明，2023年，太谷种群对阿维菌素最敏感，其次为甲氨基阿维菌素苯甲酸盐（简称甲维盐）、溴氰虫酰胺、多杀菌素、虫螨腈和氯虫苯甲酰胺，对茚虫威最不敏感，其LC₅₀最高为4.672 mg/L；与2023年相比，2024年太谷种群对虫螨腈的敏感性下降2.2倍，对甲维盐和氯虫苯甲酰胺的敏感性反而有所升高，分别为2023年的0.4和0.5倍，对其他杀虫剂的敏感性变化不大。此外，山西3个地区番茄潜叶蛾种群对甲维盐、溴氰虫酰胺、多杀菌素和虫螨腈4种杀虫剂的敏感性差异不大，对氯虫苯甲酰胺、阿维菌素和茚虫威3种杀虫剂的敏感性存在差异，分别最高相差5.6、3.8和2.9倍。以新疆室内种群对不同杀虫剂的敏感性作为敏感基线，2024年，3个田间种群对甲维盐抗性倍数为17.6-21.7，处于中等水平抗性；对虫螨腈抗性倍数为6.9-9.8，属于低水平抗性；对氯虫苯甲酰胺的抗性倍数为5.1-28.2，阳高种群处于中等水平抗性；对茚虫威的抗性倍数为4.9-14.3，芮城种群处于中等水平抗性；对多杀菌素的抗性处于敏感及敏感性下降阶段（抗性倍数为2.2-3.7）。【结论】 除多杀菌素外，山西3个地区番茄潜叶蛾对甲维盐、氯虫苯甲酰胺、茚虫威和虫螨腈产生低到中等水平抗性。研究结果可为山西省不同地区番茄潜叶蛾的药剂防治和抗性治理提供理论依据。

 [Aim]  To improve use of pesticides to control the tomato leaf miner, Tuta absoluta, a major invasive pest, and delay the development of pesticide resistance in this species. [Methods]  The susceptibility of populations from T. absoluta in Taigu, Ruicheng, and Yanggao counties, Shanxi Province, to seven insecticides was determined using the leaf-dip method under laboratory conditions in 2023 and 2024. The susceptibility of a laboratory, Xinjiang population of T. absoluta to different insecticides was used as the baseline of susceptibility to evaluate the possibility of resistance occurring in the three Shanxi populations. [Results]  The susceptibility test showed that, in 2023, the Taigu population was most susceptible to abamectin, followed by emamectin benzoate, cyantraniliprole, spinosad, chlorfenapyr and chlorantraniliprole, and the least susceptible to indoxacarb, with the highest LC₅₀ of 4.672 mg/L. However, in 2024 the susceptibility of the Taigu population to chlorfenapyr had decreased 2.2 times, whereas its susceptibility to emamectin benzoate and chlorantraniliprole had increased by 0.4 and 0.5 times, respectively, with little change in its susceptibility to the other insecticides. In addition, there was little difference in the susceptibility of the three Shanxi populations to four insecticides, namely, emamectin benzoate, cyantraniliprole, spinosad, and chlorfenapyr. There were, however, significant differences in the susceptibility of these three populations to chlorantraniliprole, abamectin and indoxacarb, with maximum differences of 5.6, 3.8 and 2.9 times, respectively. Based on the susceptibility of the Xinjiang laboratory population to the different insecticides, the resistance ratios of the three Shanxi populations to emamectin benzoate ranged from 17.6 to 21.7, indicating a moderate level of resistance. Resistance ratios to chlorfenapyr ranged from 6.9 to 9.8, which indicates low-level resistance, and resistance ratios to chlorantraniliprole ranged from 5.1 to 28.2, with the Yanggao population being the intermediate in terms of resistance. Resistance ratios to indoxacarb were 4.9-14.3 with the Ruicheng population being intermediate. Resistance to spinosad was at the susceptible, and decreasing susceptibility, stage (resistance ratios of 2.2-3.7). [Conclusion]  With the exception of spinosad, T. absoluta in Shanxi Province has developed low to moderate levels of resistance to emamectin benzoate, chlorantraniliprole, indoxacarb and chlorfenapyr. The results of this study provide useful information for better managing pesticide use and pesticide resistance in T. absoluta in different parts of Shanxi Province.