棉铃虫飞行能力和兼性迁飞的初步研究

应用吊飞装置研究比较了成虫的飞行能力 ,按飞行节律和时间区分出长飞型、短飞行和中间型 3种类型 .研究了温度和食料对生殖前期、产卵量、寿命等的影响 ,证实在 2 8℃下生殖前期仅 2 .13± 0 .67d ,温度、食料等对成虫生殖前期的影响不明显 ,可见适合其迁飞的生理时期较短 ,仅为 1～ 2个夜晚 .用雌蛾卵巢连续解剖的方法比较了江苏丰县和辽宁朝阳两地 2、3代的虫源性质 ,证实朝阳 2～ 3代成虫全部或部分从外地迁入 ,而丰县种群则以本地繁育为主 .与多种迁飞性和非迁飞性害虫比较 ,讨论了中国棉铃虫兼性迁飞特性和迁飞潜能的评估 .

Flight capacity and facultative migration of cotton bollworm

The flight capacity of moth cotton bollworm was studied by hanging flight installation. According to the flight rhythm and time, the individuals of population could be differentiated into long, medium, and short flight type. Laboratory stuies on the effect of temperature and food on pre-reproductive period, fecundity and life-span showed that the pre-reproductive period was only 2.13 +/- 0.67 days under 28 degrees C, and food or temperature had no significant effect on pre-reproductive period. The physiological period fitting for migration was quite short, only 1-2 nights. The population sources in Fengxian county, Jiangsu province and Chaoyang city, Liaoning province were studied by analysis of the dissecting of females ovary and the patterns of moth occurrence sequentially. The result indicated that the 2nd and 3rd generation moths in Chaoyang all or partly immigrated from other places, while in Fengxian, there was no migration. The flight capacity and reproductive characteristics of moth cotton bollworm were compared with other migratory or un-migratory species. The facultative migration and potential for migration of this species were discussed.