摘要
为了解小菜蛾对氰氟虫腙的抗药性规律,通过氰氟虫腙对小菜蛾田间种群抗性选育20代后,得到小菜蛾相对抗性品系。结果表明,与选育前比较,选育后小菜蛾敏感性降低9.17倍,与室内敏感品系比较,其敏感性降低27.31倍;对抗性现实遗传力(h2~)进行分析,其h2~为0.133 3;抗性风险评估结果表明,在50%、60%、70%、80%、90%的选择压力下,抗性增加100倍所需的代数分别为33.5、27.5、23.0、19.1、15.2代。
引文
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