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聊城县农业微生物试验厂从1977年开始研究生物农药防治榆兰金花虫。最初用杀螟杆菌、卵孢白僵菌,“7216”进行防治试验,杀虫效果都不高。1978年该厂从自然死亡榆兰金花虫幼虫尸体上,分离得致病菌,经中国科学院微生物研究所陈庆涛和山东大学生物系白玉谦两位同志鉴定,结果一致,属球孢白僵菌,取名“聊783”。两年来在天津、河南和本省二十多个点上进行试验,杀虫效果良好。据统计,1979年六个点的平均杀虫率为93.7％,今年十一个点平均杀虫率为80.3％。
Liaocheng County agricultural microbiology pilot plant from 1977 to study the biological pesticide control elm Golden Pest. Initially with Chickweed, Beauveria bassiana, “7216” for prevention and control tests, insecticidal effect is not high. In 1978 the plant died from the natural death of Ulmus larvae isolated from pathogens, the Chinese Academy of Sciences Institute of Microbiology Chen Qingtao and Shandong University Department of Biology Bai Yuqian two comrades identified the same result belonged to Beauveria bassiana , Named “chat 783”. Two years in Tianjin, Henan and the province more than 20 points on the trial, insecticidal effect is good. According to statistics, the average insecticidal rate at six points in 1979 was 93.7%, and the average insecticidal rate at the eleven points this year was 80.3%.