斜纹夜蛾对甲氧虫酰肼的抗性选育及抗性风险评估  

Selection and Risk Assessment of Spodoptera litura (Fabricius) Resistance to Methoxyfenozide

作　　者：王建军[1] 田大军[1] 庄静[1] 

机构地区：[1]扬州大学园艺与植物保护学院,江苏扬州225009

出　　处：《江苏农业学报》2009年第1期79-83,共5页Jiangsu Journal of Agricultural Sciences

摘　　要：在室内用甲氧虫酰肼对斜纹夜蛾进行了抗性选育，并研究了斜纹夜蛾对甲氧虫酰肼的抗性现实遗传力和抗性风险。结果表明：经过12代9次选育，斜纹夜蛾对甲氧虫酰肼抗性发展缓慢，与选育前相比敏感性降低3．95倍，斜纹夜蛾对甲氧虫酰肼的抗性现实遗传力为0．1199；在致死率为50％-90％的筛选压力下，要获得10．00倍抗性，需要8-18代，表明斜纹夜蛾对甲氧虫酰肼产生抗性的风险很小。Common cutworms, Spodoptera litura （Fabricius）, were artificially selected in the laboratory for resistance to methoxyfenozide, and the realized resistance heritability and resistance risk were evaluated. The results showed that after selection with methoxyfenozide 9 times during 12 generations, S. litura exhibited 3.95-fold reduced susceptibility to methoxyfenozide compared with unselected parent strain, which indicated slow development of resistance to methoxyfenozide in this important agricultural pest. According to the relatively low realized resistance heritability （h^2 = 0. 119 9） and assuming selection pressure being 50% -90%, it required 8 - 18 generations for S. litura to develop 10. 00-fold resistance to methoxyfenozide. These results suggested that S. litura may have limited resistance risk to methoxyfenozide.

关 键 词：甲氧虫酰肼 斜纹夜蛾 抗性选育 现实遗传力 风险评估 

分 类 号：S763.42[农业科学—森林保护学] S481.4[农业科学—林学]