Resistance risk assessment and fitness cost of cyproflanilide in the common cutworm, Spodoptera litura (Lepidoptera: Noctuidae)

文献类型： 外文期刊

第一作者： Zhan, Enling

作者： Zhan, Enling;Lu, Hui;Wang, Junyan;Zhao, Chunqing;Tian, Honggang;Xu, Lu

作者机构：

关键词： Meta -diamide insecticides; Cyproflanilide; Spodoptera litura; Resistance risk; Realized heritability; Fitness costs

期刊名称：CROP PROTECTION （ 影响因子：2.5； 五年影响因子：3.0 ）

ISSN： 0261-2194

年卷期： 2025 年 188 卷

页码：

收录情况： SCI

摘要： As a major crop pest, common cutworm (CCW) Spodoptera litura (Fabricius) has evolved resistance to several insecticides. Cyproflanilide is a novel meta-diamide insecticide targeting the gamma-aminobutyric acid receptor (GABAR), and displays excellent insecticidal activity against lepidopteran pests, including CCW. Therefore, the resistance risk of CCW against cyproflanilide was assessed and the fitness cost was evaluated as well. After exposure with cyproflanilide for 10 generations (F10), the LC50 values of CCW against cyproflanilide increased 1.26 - fold. When the realized heritability (h2) to cyproflanilide in the field was assumed to be the laboratoryestimated value (h2 = 0.09) and the mortality of CCW was 50-90 %, 126-57 generations were required to obtain a 10-fold resistance against cyproflanilide. After selected with cyproflanilide for 10 generations, the egg duration, larval duration, pre-pupal duration and female pupal weight were significantly increased, but the pupal duration, pupation rate and life-cycle rate were significantly decreased. The mean generation time (T) of F10 was significantly prolonged by 4.39 days. The value of relative fitness (Rf) in F10 was 0.99. Although resistance developed slowly, the prolonged egg and larval durations have implications for managing CCW in the field. This information will contribute to identifying practices to delay the resistance development of CCW to cyproflanilide.

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