【摘要】 山楂绢粉蝶在陇东各地每年发生 1代 ,以 3龄幼虫群集于树冠上吐丝缀叶成巢 ,并在其中越冬。幼虫共 5龄 ,幼虫食叶为害 ,每年 4月中下旬是猖獗为害期。天敌优势种是菜粉蝶绒茧蜂和白头小食虫虻等。更多还原

【Abstract】 The black veined white Aporia crataegi L.is one of the important pests on apple and azarole.It has one generation per year in eastern Gansu Province and overwinters in the third larval instar.Larval stage consists of five instars.Larvae occur from the middle to the end of April every year and in this period fruit trees are damaged seriously, Apanteles glomeratus (L.) and Philodieus albiceps Meigen are dominant species among the natural enemies of Aporia crataegi L.更多还原