Evidence for field evolved resistance to newer insecticides in Spodoptera litura (Lepidoptera: Noctuidae) from Pakistan
Evidence for field evolved resistance to newer insecticides in Spodoptera litura (Lepidoptera: Noctuidae) from Pakistan
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DOI：
10.1016/j.cropro.2008.05.003
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发表时间：
2008-10-01
期刊：
影响因子：
2.8
通讯作者：
Ahmad, Mushtaq
中科院分区：
文献类型：
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作者：
Ahmad, Munir;Sayyed, Ali H.;Ahmad, Mushtaq
在巴基斯坦广泛使用的代表性新型杀虫剂对斜纹夜蛾（Spodoptera litura，Fabricius）的毒性进行了连续3年的调查。对多杀菌素的抗性倍数为7-122倍，对茚虫威的抗性倍数为3-95倍，对阿维菌素的抗性倍数为4-186倍，对甲氨基阿维菌素的抗性倍数为2-77倍，对氟虫腈的抗性倍数为13-224倍。对昆虫生长调节剂（IGR）的抗性倍数范围为：乐螨脲2-66倍，氟虫脲8-56倍，甲氧虫酰肼2-153倍。对所有种群测试的杀虫剂的对数LC（50）的配对比较显示几种杀虫剂之间的相关性，表明交叉抗性机制。这些杀虫剂毒性低的最可能原因也可能是多种抗性机制的发展;然而，需要进一步研究来确定这些机制。当这些相同的产品对易感的实验室人群（Lab-PK）进行测试时，emamectin和indoxacarb的毒性明显高于其他测试化合物。本文还讨论了该研究结果与该地区害虫综合治理的关系。斜纹夜蛾在田间的抗性不稳定。(C)2008爱思唯尔有限公司版权所有。
The toxicity of representative newer insecticides, which are being used widely in Pakistan, were investigated against various populations of Spodoptera litura (Fabricius) collected from three different districts for 3 consecutive years. For spinosad, resistance ratio compared with Lab-PK were in the range of 7-122-fold, 3-95-fold for indoxacarb, 4-186-fold for abamectin, 2-77-fold for emamectin and 13-224-fold for fipronil. The resistance ratio for insect growth regulator (IGR) tested was in the range of 2-66-fold for leufenuron, 8-56-fold for diflubenuron and 2-153-fold for methoxyfenozide. Paired wise comparisons of the log LC(50)s of insecticides tested for all the populations showed correlations among several insecticides, suggesting a cross-resistance mechanism. The most probable reason for low toxicity of these insecticides could also be the development of multiple resistance mechanisms; however, further studies are required to establish these mechanisms. When these same products were tested against a susceptible laboratory population (Lab-PK), emamectin and indoxacarb were significantly more toxic than other compounds tested. The results are discussed in relation to integrated pest management (IPM) for the S. litura with respect to unstable resistance in the field. (C) 2008 Elsevier Ltd. All rights reserved.