The research was carried out by investigating number of predators and predation capabilities along with mortalities of the pine bast scale (?Matsucoccus liaoningensis? Tang) inside sampling plot, and by applying the ?K?-value graphic analysis method.

• 采用样方内各种捕食天敌数量与其捕食量引起辽宁松干蚧Matsucocusliaoningen?sisTang1）死亡数的调查统计法、K－值图解分析法，研究了辽宁松干蚧捕食天敌的作用。