【摘要】 系统调查表明,金坛市尧塘花木基地是该地区烟粉虱扩散蔓延的虫源地。该虫4月下旬逐渐从越冬虫源地向外扩散蔓延,首先在葎草[Humulus scandens(Lour)M err]上产卵危害,然后再危害其它植物;距虫源地越近,发生的时间早,虫口密度高,反之,则发生的时间迟,虫口密度低;11月下旬部分种群迁移到温室大棚内越冬。本文还提出了相应的控制措施。更多还原

【Abstract】 The investigation showed that,in Jintan,Bemisia tabaci was originated from Yaotang Ornamental Flower and Tree Market.The pest spread from overwintering site in late April.Humulus scandens Merr was the first host.The pest occurrence time postponed with the distance from the originating site and its density decreased with that,too.In late November,some individuals migrated into the greenhouse to experience the winter.Meanwhile,the measures for the pest control were also proposed.更多还原