Lethal and sublethal effects of fluralaner on the two-spotted spider mites, Tetranychus urticae Koch (Acari: Tetranychidae)
文献类型： 外文期刊
作者： Leviticus, Kipchoge 1 ; Cui, Li 2 ; Ling, Han 1 ; Jia, Zhong-Qiang 1 ; Huang, Qiu-Tang 1 ; Han, Zhao-Jun 1 ; Zhao, Chu 1 ;
作者机构： 1.Nanjing Agr Univ, Key Lab Integrated Pest Management Crops Eastern, Minist Agr China, Coll Plant Protect, Nanjing 210095, Jiangsu, Peoples R China
2.Chinese Acad Agr Sci, Key Lab Integrated Pest Management Crops, Minist Agr, Inst Plant Protect, Beijing, Peoples R China
3.Jiangsu Acad Agr Sci, Key Lab Food Qual & Safety Jiangsu Prov, State Key Lab Breeding Base, Inst Plant Protect, Nanjing 210014, Jiangsu, Peoples R China
关键词： acaricide; fluralaner; life table; sublethal effect; Tetranychus urticae
期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）
ISSN： 1526-498X
年卷期：
页码：
收录情况： SCI
摘要： BACKGROUND Two-spotted spider mite (TSSM), Tetranychus urticae Koch is a serious agricultural pest and has developed high levels of resistance to many acaricides. Hence, screening new acaricides is important in the control of TSSM. Fluralaner, a novel isoxazoline, has high activity against agricultural and ectoparasitic pests; however, little information is available about its effects on agricultural mites. Lethal and sublethal effects of fluralaner towards TSSM eggs and female adults were therefore evaluated in this study. RESULTS Fluralaner exhibited higher activity towards TSSM female adults (LC50, 0.49 mg L-1) compared with commercial acaricides including fenpyroximate, pyridaben and hexythiazox, and also excellent activity towards eggs (LC50, 0.36 mg L-1). The results of a sublethal effect study showed a significant reduction in the duration and fecundity of female adults with increases in the tested concentrations. The net reproductive rate (R-0) decreased to 67.34 +/- 3.96 and 50.29 +/- 3.40 offspring per individual in LC10 and LC30 treatments compared with control (108.31 +/- 7.61 offspring per individual). The intrinsic rate of increase (r) and finite rate of increase (lambda) in the controls (0.30 and 1.36 d(-1)) were significantly higher than in the LC30 treatment (0.25 and 1.29 d(-1)); whereas, they were almost identical to values for the LC10 treatment. No change in mean generation time (T) was observed at sublethal concentrations treatments. CONCLUSION Our results demonstrated that fluralaner has high acaricidal activity and could be considered a potential acaricide for TSSM management. (c) 2019 Society of Chemical Industry
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