He Heng-guo, Zhao Zhi-mo, Yan Xiang-hui, Wang Jin-jun
Municipal Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.
Ying Yong Sheng Tai Xue Bao. 2011 Aug;22(8):2147-52.
On the basis of resistance breeding and selection in laboratory, and by using the threshold trait analysis in quantitative genetics, this paper studied the realized resistance heritability of Panonychus citri (McGregor) collected from Beibei of Chongqing to avermectin and fenpropathrin, and predicted the resistance risk of P. citri to these two acaricides. After 11- and 16-generations of selection with avermectin and fenpropathrin, the resistance of P. citri to the two acaricides increased by 3.8- and 29.9-fold, and the realized resistance heritability was 0.0475 and 0.1544, respectively. Under laboratory condition, to develop a 10-fold increase of resistance required 12-26 generations of selection for avermectin, and 7-16 generations of selection for fenpropathrin under the selection pressure of 50%-90% mortality for each generation. Under field condition, it would require more generations to develop the same resistance level. Comparing with bioacaricide avermectin, pyrethroid fenpropathrin had obviously higher resistance risk to P. citri. The results provided references for the resistance management of P. citri to acaricides.
在室内抗性选育的基础上，运用数量遗传学中的阈性状分析方法，研究了采自重庆北碚的柑橘全爪螨对阿维菌素和甲氰菊酯的现实遗传力，并预测了柑橘全爪螨对这两种杀螨剂的抗性风险。经阿维菌素和甲氰菊酯分别选育11代和16代后，柑橘全爪螨对这两种杀螨剂的抗性分别提高了3.8倍和29.9倍，现实遗传力分别为0.0475和0.1544。在室内条件下，在50% - 90%的逐代死亡率选择压力下，阿维菌素抗性提高10倍需12 - 26代选育，甲氰菊酯需7 - 16代选育。在田间条件下，达到同样的抗性水平所需代数更多。与生物源杀螨剂阿维菌素相比，拟除虫菊酯类甲氰菊酯对柑橘全爪螨的抗性风险明显更高。研究结果为柑橘全爪螨对杀螨剂的抗性治理提供了参考。
