黄杨绢野螟生物学特性研究

STUDIES ON THE BIONOMICS OF DIAPHANIA PERSPECTALIS

摘要本文阐述了黄杨绢野螟[Diaphania perspectalis(Walker)]在上海地区年发生3代,并以3～4龄幼虫在黄杨木叶片上结苞越冬。翌年3月中下旬开始活动为害;经过2个世代后,第三代幼虫于9月中旬起陆续结茧越冬。同时对该虫的各虫态发育历期、生物学特性等进行了研究,为指导防治提供依据。

ABSTRACT Diaphania perspectalis(Walker)has three generations in Shanghai and overwin-ters as 3 or 4 instar larvae that cocoon on the leaves of box tree. The overwintering larvae start to move and damage the trees in the middle or late of March next year. After two generations, the larvae of the third generations overwinter gradu-ally by cocooning in the middle of September. Meanwhile, the studies of the durations of all stages and the biological characteristics are carried out in order to control this pest.