【摘要】 本文对上海市郊防护林主要树种上的害虫种类进行了初步调查。其中白榆树在市郊防护林中所占比重较大,经调查,为害白榆的害虫种类计4目19科46种。为害杨柳和竹子的害虫亦有许多种类。更多还原

【Abstract】 Investigation into important species of pest on the shelter trees in Shanghai area.The elm is the most important shelter tree here,on which have been found about 4 orders,19 families and 45 species of pest.The willow and the bamboo also get quite a lot of pests on them.更多还原