Life table study of sublethal concentrations of emamectin benzoate against Spodoptera frugiperda (Lepidoptera, Noctuidae).

IF 2.1 3区 农林科学 Q1 ENTOMOLOGY
Chengyu Chen, Yiting Tang, Yunxia Zhao, Xuefeng Zhang, Kai Zhang
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引用次数: 0

Abstract

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.

甲维菌素苯甲酸酯亚致死浓度对夜蛾的生命表研究。
秋粘虫,Spodoptera frugiperda J.E. Smith(鳞翅目:夜蛾科),是北美和南美的一种众所周知的农业害虫,在过去的十年中已经入侵了非洲、远东和澳大利亚。为探讨果蚜的综合治理,研究了甲维菌素对果蚜的亚致死效应。采用浸叶生物测定法研究了亚致死浓度(LC10和LC30)对果螨种群参数的影响,并根据年龄阶段、两性生命表理论对数据进行了解释。结果表明,亚致死浓度处理后,幼虫发育时间延长,繁殖力下降。此外,暴露于LC30浓度后,内在增长率和有限增长率以及净繁殖率显著下降,而平均世代时间较对照组延长。与对照组(0.18/天)相比,内在增重率(rm)降至0.14 (LC10)和0.13 (LC30)/天。LC10和LC30浓度处理后,净繁殖率(R0)分别从775.40下降到303.10和193.30。在本研究中,亚致死浓度的甲维菌素苯甲酸酯对果螨的发育时间、繁殖力和生命表参数有不利影响。
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来源期刊
Journal of Insect Science
Journal of Insect Science 生物-昆虫学
CiteScore
3.70
自引率
0.00%
发文量
80
审稿时长
7.5 months
期刊介绍: The Journal of Insect Science was founded with support from the University of Arizona library in 2001 by Dr. Henry Hagedorn, who served as editor-in-chief until his death in January 2014. The Entomological Society of America was very pleased to add the Journal of Insect Science to its publishing portfolio in 2014. The fully open access journal publishes papers in all aspects of the biology of insects and other arthropods from the molecular to the ecological, and their agricultural and medical impact.
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