After living through tile winter, the conidium produced by the witches’ broom of bamboo had the aid of rainwater to disseminate and infect the growing point of current shoot. Then the current shoot disased or rhizome shoot of the earth’s surface infected, formed discaed plant in sharp of a thick growth of grass. According to survey in many years, We think this disease which results from local infection, it was not systemicly infeeted. Consequently, it is the best way to wipe out the disease twig thoroughly, in another way, it has a better effect to adopt sahzuotong on dieased twig, but it was not any improvement to adopt antibioctic such as tetracline and oxytcrtracyc-line and so on for this disease symptoms.