摘要
对棉大卷叶螟Sylepta derogata Fabricius第5代、第6代室内种群饲养结果显示,该虫的有效越冬虫源为第5代滞育的老熟幼虫,滞育率24.4%～33.1%,第6代棉大卷叶螟的发生对第2年的种群基数影响不大。滞育老熟幼虫的越冬存活率为60.0%～71.9%。次年越冬代羽化的成虫雌虫少,雄虫多,单雌产卵量平均为163.4～198.8粒。
By rearing the fifth and sixth generation of Sylepta derogata Fabricius with two cotton cultivars Simian-3 and Sumian-12 in laboratory,it was found that the effective overwintering insect into next year came mainly from the fifth generation of S.derogata,with the diapause rate 24.4%～33.1%.The occurrence of sixth generation of S.derogata had little effect on the population size in the next year.The survival rate of diapaused larvae was 60.0%～71.9%.In the next year,the number of females coming from overwintering larvae was less than that of males,and the everage number of eggs per female was 163.4～198.8.
出处
《昆虫知识》
CSCD
北大核心
2008年第5期735-738,共4页
Entomological Knowledge
基金
江苏省教育厅基金(02KJB210001)
关键词
棉大卷叶螟
种群生命表
幼虫滞育
越冬虫源
Sylepta derogata,population life table,larva diapause,number of overwintering insect
