近年来我们除了把赤眼蜂用来防治玉米螟及为害甜菜的甘兰夜蛾之外,1977年我们和双城县植保站、五家果园协作,把它的应用范围扩大到果园,防治果树害虫。现将我们在五家果园利用松毛虫赤眼蜂防治苹褐卷蛾等五种果树害虫的一些试验结果整理如下,供参考。一、放蜂方法放蜂的面积共计45亩,并以同样面积的另一块不放蜂的果树地作为对照,比较放蜂效果。 In recent years, we used Trichogramma to control Ostrinia furnacalis and beet-damaged Beet armyworm. In 1977, we cooperated with Shuangcheng County Plant Protection Station and five orchards to extend its application to orchards and fruit trees Pests. Now we are in five orchards use Trichogramma Trichogramma to control the five species of fruit pests and other fruit pest test results are summarized below for reference. First, the bee-keeping method The bee-keeping area totaled 45 acres, and to another area of ​​the same area is not put bee fruit trees as a control, put the bee effect.