通化县大豆蚜虫的主要天敌有:日本豆蚜茧蜂(Lysiphlebia japonica Asbmeab)、大豆蚜茧蜂(Trioxys anctus Haliday)和三叉蚜茧蜂(Trioxys sp.)。其中日本豆蚜茧蜂约占95％以上,一般年份寄生率可达34％～70％,是大豆蚜虫前期的重要天敌。由于后期重寄生率高,羽化率低,失去对蚜虫的控制作用。为此,我们从1985年开始对不同时期、不同环境和栽培方式进行大豆蚜虫重寄生调查,结果如下: The main natural enemies of soybean aphids in Tonghua County are: Lysiphlebia japonica Asbmeab, Trioxys anctus Haliday and Trioxys sp. The Japanese aphid cocoon bee accounts for more than 95%, the general year of parasitism rate of up to 34% to 70%, soybean aphid is an important predator. Due to the high rate of late parasitism, emergence rate is low, losing control of aphids. To this end, we started from 1985 to different periods, different environments and cultivation methods for soybean aphid heavy parasite survey, the results are as follows: