当前位置: 首页 > 文章 > 二点叶螨对甲氰菊酯、氧乐果和四螨嗪抗药性的选育、衰退和恢复 昆虫学报 2002,45 (3) 341-345
Position: Home > Articles > Selection,decline and recovery of Tetranychus urticae Koch resistance to fenpropathrin,omethoate and clofentezine Acta Entomologica Sinica 2002,45 (3) 341-345

二点叶螨对甲氰菊酯、氧乐果和四螨嗪抗药性的选育、衰退和恢复

作  者:
沈慧敏;张新虎
单  位:
甘肃农业大学植物保护系
关键词:
二点叶螨;甲氰菊酯;氧乐果;四螨嗪;抗药性;遗传分析
摘  要:
以兰州吐鲁沟公园的二点叶螨Tetranychusurticae为敏感品系 ,分别用氧乐果、甲氰菊酯、四螨嗪喷雾处理 15次 ,其抗性水平分别为 38 5、 479 8和 6 7 3倍。将抗性品系分别与敏感品系进行杂交和回交的结果表明 :抗氧乐果品系的显性系数DRS (R♀×S♂ )为 0 470 0、DSR (S♀×R♂ )为 0 4749;抗甲氰菊酯品系的DRS (R♀×S♂ )为 0 5 15 5 ,DSR 为0 5 2 37;抗四螨嗪品系的DRS为 0 3134 ,DSR 为 0 2 46 6。表明二点叶螨对这 3种药剂的抗性均是由单个不完全显性基因所控制。在连续 10个月不接触药剂的情况下 ,3个抗性品系的抗药性都有下降 ,抗氧乐果品系的抗性下降最快 ,只有敏感品系的抗性倍数的 3 6倍 ;抗甲氰菊酯种群的抗性下降较慢 ,为敏感品系的 95 9倍。再经甲氰菊酯、氧乐果、四螨嗪分别连续15次喷雾处理后 ,3个抗性种群的抗性水平又再度回升 ,抗甲氰菊酯品系回升较快 ,抗性为敏感品系的 5 2 3 5倍 ,抗四螨嗪品系次之 ,抗氧乐果的品系抗性恢复最慢。
译  名:
Selection,decline and recovery of Tetranychus urticae Koch resistance to fenpropathrin,omethoate and clofentezine
作  者:
SHEN Hui-Min, ZHANG Xin-Hu (Department of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China )
关键词:
Tetranychus urticae Koch; fenpropathrin; omethoate; clofentezine; resistance; genetic analysis
摘  要:
After the susceptible strains of Tetranychus urticae were sprayed with omethoate, fenpropathrin, clofentezine for 15 times, their resistance to these insecticides increased 38.5, 479.8 and 67.3-fold respectively. Cross and backcross breeding between the resistant and the susceptible strains showed that the dominance coefficient (D) of the R-omethoate strain was RS=0.4700 and SR=0.4797; D of the R-fenpropathrin strain was RS=0.5155 and SR=0.5237; D of the R-clofentezine strain was RS=0.2466 and SR=0.3134. It was inferred that their resistance to the insecticides was controlled by a single and incomplete dominant gene. The resistance of three strains significantly declined when spraying was suspended for 10 months, and following spraying for fifteen successive times with the 3 insecticides respectively resulted in recovery of their resistance to the corresponding insecticide to different extents.

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