【摘要】 中山杉是一种新开发的速生防护用材树种，幼林地常间种棉花等农作物。大造桥虫是棉花的主要害虫，到１０ 月下旬至１１ 月上旬大造桥虫上树噬食中山杉叶，为害重的年份有虫株率达１００％ ，虫口密度１４５ 头／ 株，严重影响了中山杉的正常生长。用化学农药防治大造桥虫可取得很好的效果。更多还原

【Abstract】 The cotton etc.crops are often inter cropped in sapling forest of Taxodium ascendens × T. mucronatum.Ascotis selenaria Schifformüller et Denis is a main pest on cottons.From the last 10 days of October to the first 10 days of November they climb up the trees to defoliate.All of the trees were injured.The population density reach 145 per tree.The efficiency of chemical control is better. Authors address:Rudong County Sea Wall Forestry Administration Station,Jiangsu 226409 China更多还原