Under the light microscope, there were more than 85% spore among the three groups of Bacillus Subtilis. The inhibitted bacteria circles were all clear and their borders in order.

• 3组枯草芽孢杆菌经镜查含芽孢均在85%25以上,所铺的含菌平盘抑菌圈均清晰且边缘整齐;