菜缢管蚜、棉铃虫对杀虫混剂及其单剂的抗性遗传力分析

采用阈性状分析法，估算了菜缢管蚜Lipaphis erysimi(Kaltenbach)和棉铃虫Helicoverpa armigera(Hubuer)对菊马混剂及其单剂、棉铃虫对灭铃威混剂及其单剂的抗性现实遗传力，并对抗性风险和混剂延缓抗性的作用进行了评估。结果表明，菜缢管蚜和棉铃虫对混剂的现实抗性遗传力均明显小于各单剂，依次为：拟除虫菊酯>氨基甲酸酯>有机磷>混剂。混剂的使用寿命大于组成其各个单剂的使用寿命之和，抗性风险依次为：拟除虫菊脂>氨基甲酸酯>有机磷>混剂。菊马混剂对菜缢管蚜和棉铃虫，灭铃威混剂对棉铃虫均有延缓抗性发展的作用。灭铃威对棉铃虫抗性发展的延缓作用最显著。

REALIZED HERITABILITY ANALYSIS OF RESISTANCE TO SINIGLE AND MULTIPLE INSECTICIDES IN LIPAPHIS ERYSIMI (KALTENBACH) AND HELICOVERPA ARMIGERA (H(U)BNER)

Realized heritabilities (h²) of resistance to F-M mixture (fenvalerate+malathion) and its components in Lipaphis erysimi (Kaltenbach) and Helicoverp aarmigera (Htibner) and to CPM mixture (cyhalothrin+parathion-methyl+methomyl)and its components in Helicoverpa armigera were estimated by threshold trait analysis.The values of h² to mixtures in Lipaphis erysirni and Helicoverpa armigera were smaller than that of its components significantly, and the order was: pyrethroid>carbamate>organophosphorus〉mixture. The application lifetime of the two mixtures was longer than the total of its compoments's lifetimes respectively, resistance risk was: pyrethroid >carbamate>organophosphorus>mixture. Both F-M mixture and CPM mixture could delay resistance development, and CPM mixture was better in delaying resistance development in Helicoverpa armigera.