“7501”菌剂是乌苏县林管站土法生产的微生物农药,在该地区防治部份鳞翅目、鞘翅目害虫幼虫效果特别显著,能否在我市园林上大量推广,必须要进行毒力测定,现将我们初步试验加以整理,供今后工作参考.一、具体作法一九七八年八月二十三日从乌苏县林管站微生物厂带回两支“7501”斜面培养菌种试管,肉眼观察:在蛋白冻琼脂培养基上,“7501”菌落灰白色,无光泽,具皱纹,局部边缘 “7501” is a microbial pesticide produced by native method in Forest Station of Wusu County. It is particularly effective in preventing and controlling some Lepidoptera and Coleoptera pests in this area. It is necessary to carry out large-scale promotion in the garden of our city. Toxicity determination, we will now be the first test to be collated for future reference .A specific approach August 23, 1978 from Wusu County Forest Station Microbiological Factory brought back two “7501” bevel training Bacterial test tube, visual inspection: On a protein frozen agar medium, the “7501” colony is off-white, dull, wrinkled, with a localized edge