文献类型： 外文期刊

作者： Jiang, Mingjun ¹ ; Qian, Xiujuan ¹ ; Zhou, Zhaoxu ² ; Liu, Yueying ² ; Zhang, Meijiao ² ; Yang, Yaxian ¹ ;

作者机构： 1.Gansu Agr Univ, Coll Plant Protect, Lanzhou 730000, Peoples R China

2.Gansu Acad Agr Sci, Plant Protect Res Inst, Lanzhou 730000, Peoples R China

3.Gansu Prov Agr Pest Nat Enemy Engn Res Ctr, Lanzhou 730000, Peoples R China

关键词： spinetoram; Tuta absoluta; survival and developmental; antioxidant enzymes; detoxifying enzymes

期刊名称：INSECTS （ 影响因子：2.9； 五年影响因子：3.3 ）

ISSN：

年卷期： 2024 年 15 卷 12 期

页码：

收录情况： SCI

摘要： Tuta absoluta is a major pest, damaging tomato crops in many countries. Spinetoram, a novel insecticide, is increasingly used for the management of various insect pests. However, limited information is available on its lethal effects on T. absoluta. Therefore, this study was carried out to evaluate the toxicity of spinetoram concentrations in T. absoluta by exposing third-instar larvae to this insecticide through leaf-dipping bioassays under laboratory conditions. The results showed that sublethal spinetoram concentrations (LC10 and LC20) extended the developmental duration of the larval and pupal stage, as well as the oviposition period, and decreased the pupal weight, pupation and eclosion rates, fecundity, sex ratio, and egg-hatching rate compared to the control group. LC10 and LC20 treatments up-regulated the activity of superoxide dismutase and catalase antioxidant enzymes in T. absoluta larvae by 51.14-88.72% and 39.34-87.76% at 12 h, 62.71-96.68% and 37.38-39.92% at 24 h, and 41.78-53.34% and 19.44-48.39% at 48 h, respectively, compared to the control. Conversely, the LC10 and LC20 treatments inhibited the activities of detoxifying enzymes, i.e., carboxylesterase (14.72-34.95%), acetylcholinesterase (9.02-48.86%), glutathione S-transferase (19.40-43.19%), and mixed-function oxidase (18.18-25.93%). These findings indicate that lethal concentrations of spinetoram influence the population dynamics of T. absoluta by reducing their survival and developmental potential and inhibiting the activity of detoxifying enzymes.