白绢病白绢病菌侵染薄荷茎基部,使它产生褐色坏死斑。发病初期,病株地上部叶片褪色、萎蔫,茎基及地际处产生有大量白色丝状物和棕色油菜籽状小颗粒;病情加重后导致植株生长势减弱、萎凋或全株枯死。病菌随病残体遗留土中越冬。病株产生的绢丝状物延伸接触邻近植株或病菌随水流传播,使病害传播蔓延。连作、土质粘重、地势低洼或高温多湿年份发病重。发病株率10%以上时,一定要采取措施加以控制。防治方法:(1)重病地避免连作。提倡施用日本酵素菌沤 Scirpus sclerotiorum infects stem base of peppermint and causes brown necrotic spots. In the early stage of disease, a large number of white filaments and brown rapeseed-like small particles were formed on the leaves of above-ground parts of the diseased plants due to fading, wilting, stem base and the ground; aggravating the disease resulted in weakened plant growth potential, withered or whole plant withering. Bacteria leave the soil with the disease overwintering. Silk disease caused by disease strains extended contact with neighboring plants or bacteria spread with the flow of water, so that spread of disease spread. Continuous cropping, soil sticky, low-lying or hot and humid years of onset heavy. When the incidence of plant more than 10%, we must take measures to control. Prevention methods: (1) seriously ill to avoid continuous operation. Promote the use of Japanese enzyme bacteria 沤