【摘要】 美国杂交杏李园害虫中桃蚜[Myzus persicae(Sulzer)]与山楂叶螨(Tetranychus viennensis Zacher)的生态位宽度较宽,占据空间较大,为害虫优势种群,在空间维度上害虫之间存在较大竞争;大草蛉(Chrysopa septempenctata Wesmael)在各期的生态位宽度最大,说明大草蛉是重要的优势天敌,且天敌与主要害虫在空间上相遇机率较大;天敌之间生态位重叠指数较高,表明主要天敌之间存在明显的相互竞争关系;美国杂交杏李园天敌对主要害虫在时间维度上有较强的追随效应和控制作用。更多还原

【Abstract】 The niche breath of Myzus persicae and Tetranychus viennensis were more than other pests in U.S.hybrid apricot and plum orchard,those are dominant population occupying more space;Resources of natural enemies were rich and majority was Chrysopa septempenctata;Pests had strong competition, natural enemies were so.Natural enemies and major pests could meet very often.They had strong pursuing and control effect to Myzus persicae and Tetranychus viennensis from time dimension.更多还原