摘要
苹果绵蚜在昭通市1年最高发生15～16代，最低发生10代，世代重叠。10月份部分虫进入越冬期，1月份苹果绵蚜开始活动。7～8月份，完成1代仅需11～27d，而在冬季完成1代需50．3～92．5d。1年产生2次有翅蚜，夏季有翅蚜所产生的后代均为孤雌蚜，而秋季所产生的后代不仅有孤雌蚜，而且能够产生性蚜。各龄虫均有越冬，其中以第2龄虫为主，田间尚未发现性蚜和卵。第1龄虫为全年主要迁移虫态，占98％以上。
According to observation in Zhaotong city, Woolly apple aphid has 15 or 16 generations in maximum and 10 generations in minimum a year, with generation overlapping. The aphid begins overwinter in October and ends in January, Only 11 - 27 days were required for its finishing one generation during July and August, but 50.3 - 92.5 days in winter, The winged aphide have two occurrence a year in summer and autumn. In summer all offspring produced by winged aphid are asexual females,but it can reproduce both the asexual females and sexual aphids in autumn. Every instar nymphs can overwinter, especially the second instar. No sexual aphids and egg were observed in fields. The first nymphs were mainly crawlers, accounting for over 98 %.
出处
《西南农业学报》
CSCD
2006年第2期251-254,共4页
Southwest China Journal of Agricultural Sciences
基金
云南省省院省校科技合作项目(2002FCBFB01K001)
关键词
苹果绵蚜
发生世代
习性
昭通市
woolly apple aphid
life history
habits
Zhaotong city
