【摘要】 对我国天敌昆虫引进 2 0多年来各阶段的引种量、引进重复率、引种国际范围、引种单位、引进种类和引进后的应用情况的变化进行了分析 ,结果表明 ,我国的年平均引种量虽然逐年有所上升 ,但每年基本上维持在 8～ 1 0种次。 2次、3次引种重复率逐年降低 ,至 2 0 0 0年2次引种率大约 2 3%。 3次引种率在 1 0 %左右。引种目标国由 4个到 38个 ,引种单位数量变化相对不大 ,1 986年后年平均基本上维持在 1 0个左右。应用效果分 3种类型 :( 1 )建立种群起到控害作用 ;( 2 )建立不稳定种群控害效果不明显 ;( 3)未能建立种群。更多还原

【Abstract】 Analysis of introduced beneficial insects number, species, introducing repeat ratio, export countries and results of application shows that the average number of introduced species remain in between 8 to 10. Repeat ratio of twice and thrice introduction went down from 66%～75% during year period of 1979～1990 to 10%～23% in 2000?Export country numbers increased from 4 to 38 in the 20 years?Numbers of introduced species kept unchanged almost in every 10 years period. Application results can be divided into three types, 1.established population and suppress target pests successfully; 2.population in field was unstable and effect has not been demonstrated; 3. unable to survival in the new environment.更多还原