棉铃虫对氰戊菊酯抗性遗传分析

本文采用剂量对数-死亡机率值回归线(LD-P线)分析法, 利用室内选育的棉铃虫 Heliccverpa armitera(Hubner)对氰戊菊酯抗性晶系和敏感品系,研究了棉铃虫对氰戊菊酯的抗性遗传规律。结果表明,棉铃虫对氰戊菊酯的抗性为多基因遗传,其主要基因为不完全显性,抗性不属性连锁遗传。利用增效剂对抗性机理进行的研究表明,多功能氧化酶(MFO)是棉铃虫对氰戊菊酯产生抗药性的主要因子,因此,可以推断多功能氧化酶基因为不完全显性。     

SURVIVAL OF HELICOVERPA PUNCTIGERA (WALLENGREN) AND H. ARMIGERA (HÜBNER) (LEPIDOPTERA: NOCTUIDAE) PUPAE SUBMERGED IN WATER

The effect of varying periods of submersion in water on survival of non-diapausing pupae of Helicoverpa punctigera (Wallengren) and H. armigera (Hübner) was investigated. At 25°C the submersion time to kill 50% of pupae was 49 h for H. punctigera and 35 h for H. armigera . Since pupae survive relatively long periods under water, drowning may not be an important mortality factor in the field except when prolonged waterlogging occurs.