一九七三年春、夏我们开展“以菌治虫”的试验研究,测定青虫菌、杀螟杆菌、白僵菌对茶毛虫分别有甚为良好、良好、好的杀虫效果;青虫菌、杀螟杆菌在茶园试验对茶蚕还分别有甚为良好、良好的持续杀虫效果(以上已报导在本刊一九七三年三期十五页)。当年秋季,继续对茶毛虫进行这几种菌剂的茶园效果试验,结果同上述测定 In spring and summer of 1973, we carried out the experimental study of “controlling pests by bacteria”, and determined that there was a very good, good and good pest-killing effect on the caterpillars of the coccidian; The test of Bt rice in the tea plantations also showed very good and good sustained insecticidal effects respectively (as reported above in the third issue of the Third Plenary, 1973). In the fall, tea caterpillars continue to carry out these kinds of fungicide tea plantation effect test results with the above determination