Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education, College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
Pest Manag Sci. 2014 Jun;70(6):989-95. doi: 10.1002/ps.3640. Epub 2013 Oct 16.
Chilo suppressalis Walker, the rice striped stem borer (RSSB) is one of the most serious lepidopteron insect pests of rice in Asia. The registration of chlorantraniliprole added an option for the chemical control of RSSBs.
In this study, the geographic variability of susceptibility of field-collected RSSBs to chlorantraniliprole was assessed to establish a baseline for future comparisons of field population responses to the increased use of chlorantraniliprole products. Thirty-one RSSB colonies were established from 22 geographic areas in seven provinces of China, and were evaluated for chlorantraniliprole susceptibility. The range of mean lethal concentration (LC50 ) values in response to this chemical was between 0.821 and 17.720 mg (AI)/L across the populations. Susceptibility was significantly different (21.7-fold for LC50 and 55.6-fold for LC90 ) across the various geographic populations. No significant correlations were detected between the LC50 values of chlorantraniliprole and four conventional insecticides (monosultap, triazophos, chlorpyrifos and abamectin).
These results revealed great geographical variations in chlorantraniliprole susceptibilities among different geographic populations of RSSBs, which might indicate the potential for RSSBs to develop resistance to chlorantraniliprole. The effective execution of insecticide resistance monitoring programs and management strategies is urgently needed in China to sustain RSSB susceptibility to chlorantraniliprole.
二化螟是亚洲水稻上最严重的鳞翅目害虫之一。氯虫苯甲酰胺的登记为 RSSB 的化学防治提供了一种选择。
本研究评估了田间采集的 RSSB 对氯虫苯甲酰胺的地理变异性敏感性，为未来比较田间种群对氯虫苯甲酰胺产品使用增加的反应建立了基线。从中国七个省的 22 个地理区域建立了 31 个 RSSB 种群，并对其对氯虫苯甲酰胺的敏感性进行了评估。该化学物质的平均致死浓度 (LC50) 值范围在种群之间为 0.821 至 17.720 毫克 (AI)/升。不同地理种群的敏感性有显著差异（LC50 差异 21.7 倍，LC90 差异 55.6 倍）。在氯虫苯甲酰胺和四种常规杀虫剂（单甲脒、三唑磷、毒死蜱和阿维菌素）的 LC50 值之间未检测到显著相关性。
这些结果表明，不同地理种群的 RSSB 对氯虫苯甲酰胺的敏感性存在很大的地理差异，这可能表明 RSSB 对氯虫苯甲酰胺产生抗性的潜力。在中国，迫切需要执行有效的杀虫剂抗性监测计划和管理策略，以维持 RSSB 对氯虫苯甲酰胺的敏感性。
