Life table study of sublethal concentrations of emamectin benzoate against Spodoptera frugiperda (Lepidoptera, Noctuidae)
文献类型： 外文期刊
作者： Chen, Chengyu 1 ; Tang, Yiting 1 ; Zhao, Yunxia 1 ; Zhang, Xuefeng 1 ; Zhang, Kai 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Huaiyin Inst Agr Sci Xuhuai Reg Jiangsu, Plant Protect Ctr, Nanjing 223001, Jiangsu, Peoples R China
2.China Natl Agr Sci Observat & Expt Stn Huaian, Huaian 223001, Jiangsu, Peoples R China
关键词： emamectin benzoate; Spodoptera frugiperda; sublethal effects; population growth parameters; two-sex life table
期刊名称：JOURNAL OF INSECT SCIENCE （ 影响因子：2.0； 五年影响因子：2.6 ）
ISSN：
年卷期： 2025 年 25 卷 1 期
页码：
收录情况： SCI
摘要： The fall armyworm, Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae), is a well-known agricultural pest in North and South America and has invaded Africa, the Far East, and Australia in the past decade. To investigate the integrated management of S. frugiperda, the sublethal impacts of emamectin benzoate were studied. Leaf-dipping bioassays were used to investigate the effects of sublethal (LC10 and LC30) concentrations of emamectin benzoate on S. frugiperda demographic parameters, and data were interpreted based on the age-stage, two-sex life table theory. The results showed that the developmental time of larvae was prolonged while the fecundity decreased after sublethal concentration treatment. Furthermore, the intrinsic and finite rates of increase, as well as the net reproductive rate, significantly declined following LC30 concentration exposure, whereas the average generation time was extended in comparison to the control group. The intrinsic rate of increase (rm) dropped to 0.14 (LC10) and 0.13 (LC30)/day, compared to the control group (0.18/day). The net reproductive rate (R0) dropped from 775.40 to 303.10 and 193.30 after the LC10 and LC30 concentration treatment, respectively. In this study, sublethal concentrations of emamectin benzoate adversely affected the developmental time, fecundity, and life table parameters of S. frugiperda.
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