中国蔬菜 ›› 1999, Vol. 1 ›› Issue (2): 4-0.

• 研究论文 • 上一篇    下一篇

广州地区小菜蛾对Bt和阿维菌素敏感性的测定

刘宏海; 黄彰欣;   

  1. 华南农业大学昆虫毒理研究室;
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-03-20 发布日期:1999-03-20

Studies on the Susceptibility of Guangzhou Diamondback Moth to Bacillus thuringiensis and Abamectin

Liu Honghai; Huang Zhangxin   

  1. Laboratory of Insect Toxicology; South China Agricultural University; Guangzhou 510642
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-03-20 Published:1999-03-20

摘要: 采用叶片残留法测定了广州地区小菜蛾对Bt和阿维菌素的敏感性。结果表明,以LC50比值分析,广州地区田间小菜蛾对福建Bt、湖北Bt、深圳Bt和揭阳Bt的抗性倍数分别为1.44、2.90、3.82、3.00;对阿维菌素的抗性,以LC50比值分析,3龄、4龄幼虫分别为2.39倍和2.86倍;以LC95比值分析,3龄、4龄幼虫分别为4.24倍和7.11倍。从毒力回归直线方程斜率值分析,广州地区小菜蛾对几种Bt和阿维菌素有产生较高抗药性的发展趋势。

关键词: Bt, 阿维菌素, 小菜蛾, 抗药性

Abstract: Insecticide resistance of Guangzhou detected by the leaf residue bioassay showed that the resistance ratios were 1.44~3.82 folds to different Bt formulations;The resistance ratios of the 3rd and 4th instar larvae were 2.39 and 2.86 folds to Abamectin at LC 50 ,and were 4.24 and 7.11 folds at LC 95 . It was noticed that the slopes of LD P line from the Guangzhou Diamondback Moth population were less than that of LD P line from standard susceptible population. This suggests that the resistance of Gu...