摘要
通过设计不同的迁移比例(1%、5%、10%、20%),研究棉铃虫抗药性基因流动对三氟氯氰菊酯和氰戊菊酯抗性频率的影响。结果表明,抗性个体迁入敏感种群,使得敏感种群抗性频率增加,迁移比例越大,抗性频率增加越大;而敏感个体迁入抗性种群使得其抗性频率减少,随着敏感个体迁入比例的增大,抗性种群中抗性频率的减少量越大。利用抗性频率变化值与相应迁移率的比值来表示迁移的相对效率,结果表明迁移率为1%时,迁移影响抗性个体频率变化的相对效率最高。
Individual frequencies of resistance to cyhalothrin and fenvalerate in cotton bollworm ( Helicaverpa armigera Hubner) were measured with different rates of immigration ( 1 % , 5% , 10% and 20%). When resistant adults immigrated into the susceptible population, frequency of resistant individual increased. The frequency decreased after the susceptible adults immigrated into resistant population. Changes (increased or decreased ) of resistant individual frequency increased with the rates of immigration. The results also showed that the relative efficacy of influence on the frequency changes by immigration was highest among the 4 tested immigration rates when the migration ratio was 1 % .
出处
《植物保护学报》
CAS
CSCD
北大核心
2000年第3期273-276,共4页
Journal of Plant Protection
基金
"九五"国家科技攻关课题(96-005-01-08)资助