Baseline susceptibility, risk assessment, biochemical mechanism and fitness cost of broflanilide resistance in Tuta absoluta from China

文献类型： 外文期刊

第一作者： Qu, Cheng

作者： Qu, Cheng;Lin, Ao-li;Wang, Ze-hua;Feng, Yao-fang;Luo, Chen;Wang, Ran;Qu, Cheng;Wang, Ze-hua;Luo, Chen;Wang, Ran;Lin, Ao-li;Fang, Yong;Wang, Ran;Guedes, Raul Narciso C.

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关键词： tomato pinworm; toxicity; field-evolved resistance; resistance risk; detoxifying enzymes

期刊名称：ENTOMOLOGIA GENERALIS （ 影响因子：4.6； 五年影响因子：4.4 ）

ISSN： 0171-8177

年卷期： 2025 年 45 卷 2 期

页码：

收录情况： SCI

摘要： The tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), is a globally invasive and highly destructive pest that primarily targets solanaceous plants. This species has developed resistance to most currently used insecticides. Broflanilide, a novel meta-diamide insecticide that binds to a unique site on the gamma-aminobutyric acid receptor, has been effectively used for managing Lepidopteran pest species. This study aimed to explore the development of resistance, fitness effects, and underlying biochemical mechanisms. A laboratory strain of T. absoluta was exposed to broflanilide for 17 generations, showing no apparent resistance development. The low realized heritability of 0.0804 indicated a minimal risk of resistance. Fifteen field-collected populations of T. absoluta were surveyed and exhibited high susceptibility to broflanilide, with resistance ratios ranging from 0.63 to 3.53. The activities of major detoxification enzymes (cytochrome P450 monooxygenase, carboxylesterase, and glutathione S-transferase) remained unchanged after broflanilide selection. Life table analysis revealed extended larval stages and reduced adult longevity, fecundity, and oviposition duration in the broflanilide-selected strain, but without significantly affecting overall fitness. These findings provide valuable insights for formulating practical guidelines for the effective use of broflanilide in managing insecticide resistance in T. absoluta.

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