我场现有紫胶寄主林六百四十多亩,年产种胶约一万斤.在放养紫胶虫过程中,常受白虫危害而造成减收或失败.一九七二年秋,我们场的“三结合”科研组,从外地引进了小茧蜂种,经室内人工饲育繁殖,发展到五万多只,一九七三年夏代,利用这些经人工饲育出来的小茧蜂作防治白虫试验,效 In our field, there are 640 hectares of laccase host forest, with an annual output of about ten thousand jin of glue. During the process of stocking lac bug, it is often harmed by white worms to reduce or fail. In the autumn of 1972, Our field of “three combination” research group, introduced from the field of small calluses bees, breeding indoor artificial breeding, development to more than 50,000, the summer of 1973, the use of these caged calluses Bees for white worm test, effectiveness