摘要
桑皱鞘叶甲越冬成虫在湖桑和杂交桑桑园土层 30～ 50cm深处分布最多 ,分别占总虫数的65 0 7%和 65 92 % ,显著高于其它深度土层的成虫数 ;其次是 1 0～ 30cm深处 ,分别占 2 1 69%和 34 0 8% ;0～ 1 0cm以内无越冬成虫分布。越冬成虫 4月中旬开始出土 ,4月下旬大量出土 ,出土成虫数占总成虫数的 80 %以上。田间成虫 4月中旬开始为害 ,4月底到 5月上旬是发生和为害的高峰期。夏伐对桑皱鞘叶甲的成虫数量有显著的抑制作用。
The mulberry beetle, Abirus fortunei (Baly),overwintered under ground in mulberry fields.65.07% and 65.92% of the total hibernating adults were distributed over 30～50cm underground in common mulberry fields and hybrid mulberry fields respectively,while the ratios of adults of 10～30cm underground were 21.69% and 34.08%.The hibernating adults emerged out of land and gnawed mulberry leaves from middle April,and more than 80% of the adults came out in late April.Damaging peaks occurr from late April to early May.Summer cutting of mulberry branch could restrain significantly population density of the adults.
出处
《蚕业科学》
CAS
CSCD
2000年第4期205-209,共5页
ACTA SERICOLOGICA SINICA
基金
江西省科委资助项目
关键词
桑皱鞘叶甲
种群动态
Abirus fortunei
Population dynamics
