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王志钢, 海秀平, 许永红, 钱巍. 家蝇对氯氰菊酯抗性的风险评估与预报[J]. 中国公共卫生, 2004, 20(3): 363-364.
引用本文: 王志钢, 海秀平, 许永红, 钱巍. 家蝇对氯氰菊酯抗性的风险评估与预报[J]. 中国公共卫生, 2004, 20(3): 363-364.
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WANG Zhi-gang, HAI Xiu-Ping, XU Yong-hong, . Risk assessment and prediction of resistance to cypermethrin in housefly(Musca domestica)[J]. Chinese Journal of Public Health, 2004, 20(3): 363-364.
Citation: WANG Zhi-gang, HAI Xiu-Ping, XU Yong-hong, . Risk assessment and prediction of resistance to cypermethrin in housefly(Musca domestica)[J]. Chinese Journal of Public Health, 2004, 20(3): 363-364.
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家蝇对氯氰菊酯抗性的风险评估与预报

Risk assessment and prediction of resistance to cypermethrin in housefly(Musca domestica)

    摘要
  • 摘要:
      目的   评估家蝇(Musca domestica)对氯氰菊酯抗性风险, 预测抗性发展速率。
      方法   采集自然种群家蝇带回室内饲养, 采用点滴法用氯氰菊酯筛选抗性品系, 测定LD50; 采用Tabashnik的方法测定抗性遗传力和预测抗性发展速率。
      结果   家蝇在室内饲养并用氯氰菊酯连续筛选了10代, 平均存活率54.5%, 抗性上升了50倍.测得抗性遗传力h2为0.1577。据此预测在50%~90%的杀死率的选择压力下, 要获得10倍的抗性仅需2.2~4.8代。
      结论   家蝇对氰氰菊酯抗性上升迅速, 10代内抗性遗传力基本稳定。

     

    Abstract:
      Objective   To assess resistance risk to cypermethr in and predict the rate of r esistance development in housefly(Musca domestica).
      Methods   Houseflies collected from natural group were cultured in laboratory.Resistant strain to cypermethrin in housefly was obtained while LD50 was deter mined with the method of topical application.Based on the method described by Tabashnik(1992), the realized heritability(h2)to cypermethrin in housefly was estimated and the rate of resistance development was predicted.
      Results   Continuously selected with cypermethr in for 10 generations at the average survival percentage of 54.5% in laboratory, the strain of housefly had a 50-fold increase in resistance to cypermethrin.The realized heritability(h2)of resistance to cyper methrin in housefly was estimated to be 0.157 7.The rate of resistance development for 10 fold in the housefly was predicted based on the estimation of the realized heritabilit y(h2), and it only needs 2.2-4.8 generations under the selected pressure of mortality ranged 50%-90%.
      Conclusion   The resistance to cypermethrin in housefly in creased rapidly and the realized heritability(h2)was stable in 10 generations.

     

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