Alinejad Marzieh, Kheradmand Katayoon, Fathipour Yaghoub
Department of Entomology and Plant Pathology, College of Abouraihan, University of Tehran, Pakdasht, Iran.
Exp Appl Acarol. 2014 Nov;64(3):361-73. doi: 10.1007/s10493-014-9830-y. Epub 2014 Jun 30.
Knowledge of the impact of acaricides on predatory mites is crucial for integrated pest management programs. The present study evaluated the sublethal effect of fenazaquin (Pride(®) 20 % SC, Behavar, Iran) on life table parameters of the subsequent generation of the predatory mite, Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae), fed on Tetranychus urticae Koch under laboratory conditions [26 ± 1 °C, 70 ± 3 % RH and 16:8 (L:D) h]. The sublethal concentrations including LC10, LC20 and LC30 were determined using a dose-effect assay. The total development time of both sexes enhanced with an increase in concentration. The oviposition period and total fecundity decreased in dose-dependent manner. The intrinsic rate of increase (r) and finite rate of increase (λ) significantly descended with concentration enhancing from LC10 to LC30, compared with the control. The net reproductive rate (R 0) ranged between 2.76 and 7.37 offspring. Overall, the results indicated that fenazaquin had negative effects on development and life table parameters of the subsequent generation of A. swirskii. In conclusion, fenazaquin is not a compatible acaricide with A. swirskii and should not be used with this predatory mite in integrated management of T. urticae.
了解杀螨剂对捕食螨的影响对于综合虫害管理计划至关重要。本研究评估了喹螨醚（Pride(®) 20%悬浮剂，伊朗Behavar公司）在实验室条件下（26±1°C、70±3%相对湿度和16:8（光照:黑暗）小时）对以二斑叶螨为食的斯氏钝绥螨（蜱螨亚纲：植绥螨科）后代生命表参数的亚致死效应。使用剂量效应试验确定了包括LC10、LC20和LC30在内的亚致死浓度。随着浓度增加，两性的总发育时间均延长。产卵期和总繁殖力呈剂量依赖性下降。与对照相比，随着浓度从LC10增加到LC30，内禀增长率（r）和周限增长率（λ）显著下降。净繁殖率（R0）在2.76至7.37个后代之间。总体而言，结果表明喹螨醚对斯氏钝绥螨后代的发育和生命表参数有负面影响。总之，喹螨醚不是一种与斯氏钝绥螨相容的杀螨剂，在二斑叶螨的综合管理中不应与这种捕食螨一起使用。
