斜纹夜蛾（Hübner）（鳞翅目：夜蛾科）对氯虫苯甲酰胺的抗风险评估。
Assessment of resistance risk in Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) to chlorantraniliprole.
机构信息
College of Plant Protection, Nanjing Agricultural University, Nanjing, China.
出版信息
Pest Manag Sci. 2011 Nov;67(11):1468-72. doi: 10.1002/ps.2201. Epub 2011 May 18.
BACKGROUND
Beet armyworm, Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae), is a major pest of numerous cultivated crops. Chlorantraniliprole, the first commercialised ryanodine receptor insecticide from the anthranilic diamide class, has exceptional insecticidal activity on a range of lepidopteran pests. The aim of this study was to assess the resistance of S. exigua to chlorantraniliprole in the laboratory.
RESULTS
A field-collected population of S. exigua was selected after repeated exposure to chlorantraniliprole to determine the risk of resistance evolution. After 22 generations of selection, there was a 12.0-fold increase in LC(50) . The realised heritability (h(2)) of resistance was estimated as 0.1082 by using threshold trait analysis. The projected rate of resistance evolution indicated that, if h(2) = 0.1082 and 70% of the population was killed at each generation, then a tenfold increase in LC(50) would be expected in 21.7 generations for chlorantraniliprole.
CONCLUSION
These results show that the risk of resistance development to chlorantraniliprole exists in S. exigua after continuous application.
背景
甜菜夜蛾，Spodoptera exigua（Hübner）（鳞翅目：夜蛾科），是许多栽培作物的主要害虫。氯虫苯甲酰胺，一种来自邻苯二甲酰胺类的首个商业化的肌醇 1,4,5-三磷酸受体杀虫剂，对一系列鳞翅目害虫具有优异的杀虫活性。本研究旨在评估甜菜夜蛾对氯虫苯甲酰胺的室内抗性。
结果
在田间采集的甜菜夜蛾种群在反复接触氯虫苯甲酰胺后被选择，以确定抗药性进化的风险。经过 22 代的选择，LC50 增加了 12.0 倍。通过阈性状分析，估计出抗性的现实遗传力（h2）为 0.1082。预测的抗性进化速度表明，如果 h2=0.1082，且每代有 70%的种群被杀死，那么在氯虫苯甲酰胺中 LC50 预计将在 21.7 代内增加 10 倍。
结论
这些结果表明，在连续使用的情况下，甜菜夜蛾对氯虫苯甲酰胺的抗性发展存在风险。
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