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首页> 外文期刊>Pesticide Biochemistry and Physiology >Cycloxaprid: A novel cis-nitromethylene neonicotinoid insecticide to control imidacloprid-resistant cotton aphid (Aphis gossypii)
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Cycloxaprid: A novel cis-nitromethylene neonicotinoid insecticide to control imidacloprid-resistant cotton aphid (Aphis gossypii)

机译：Cycloxaprid：一种新型的顺-硝基亚甲基新烟碱类杀虫剂，可控制耐吡虫啉的棉蚜（Aphis gossypii）

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摘要

Imidacloprid is a nicotinic acetylcholine receptor (nAChR) agonist with potent insecticidal activity. However, resistance to imidacloprid is a significant threat and has been identified in several pest species. Cycloxaprid with cis-configuration is a novel neonicotinoid insecticide, which shows high activity against imidacloprid-resistant pests. The LC50 of imidacloprid against the resistant Aphis gossypii was 14.33 mg L-1 while it was only 0.70 mg L-1 for the susceptible population, giving a resistance ratio of 20.47. In this imidacloprid-resistant population, a point mutation (R81T) located in the loop D region of the nAChR beta 1 subunit was found out. But this point mutation did not decrease the activity of cycloxaprid against A. gossypii. The LC50 of cycloxaprid was 1.05 and 1.36 mg L-1 for the imidacloprid-susceptible and imidacloprid-resistant populations, respectively. In addition, cycloxaprid provided better efficacies against resistant A. gossypii than imidacloprid in the fields. Although cycloxaprid was highly toxic to A. gossypii, it showed high selective activity between A. gossypii and its predominant natural enemies, Harmonic axyridis and Chrysoperla sinica. These results demonstrate that cycloxaprid is a promising insecticide against imidacloprid-resistant A. gossypii and suitable for the integrated pest management. (C) 2016 Published by Elsevier Inc.
机译：吡虫啉是具有有效杀虫活性的烟碱乙酰胆碱受体（nAChR）激动剂。但是，对吡虫啉的抗药性是一个重大威胁，并且已在几种害虫物种中得到鉴定。具有顺式构型的环oxaprid是一种新的烟碱类杀虫剂，对耐吡虫啉类害虫显示出高活性。吡虫啉抗药性棉蚜的LC50为14.33 mg L-1，而易感人群的LC50仅为0.70 mg L-1，抗性比为20.47。在这种对吡虫啉有抗药性的人群中，发现了位于nAChR beta 1亚基环D区的点突变（R81T）。但是这一点突变并没有降低环沙必利抗棉铃虫的活性。吡虫啉易感人群和吡虫啉耐药人群的环丙沙星的LC50分别为1.05和1.36 mg L-1。另外，在田间，环吡喃比抗吡虫啉提供了更好的抗棉衣曲霉的功效。尽管环沙哌啶对棉铃虫具有很高的毒性，但它在棉铃虫及其主要天敌，谐波木虱和Chrysoperla sinica之间显示出较高的选择性活性。这些结果表明，环磷酰胺是一种有前景的杀虫剂，可抵抗耐吡虫啉的棉衣曲霉，并适于病虫害综合治理。 （C）2016由Elsevier Inc.发布

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