稻曲病是我市水稻穗期的常发性病害 ,近三年随高秆大穗品种的推广 ,后期穗肥水平提高 ,该病发生逐年加重。病菌侵染稻谷后 ,空秕粒增加 ,千粒重下降 ,影响水稻产量、米质。受害较重的田块减产10 %以上。 1999～ 2 0 0 0年我们对其发生危害特点及控制对策进行了初步探讨。1发生? False smut is a common disease of paddy in our city. With the popularization of tall stalk and big spike breed in the recent three years, the level of panicle fertilization increased in the later stage, and the incidence of this disease increased year by year. After the bacteria invade the rice, the amount of empty rice grains increases and the grain weight decreases, affecting the rice yield and the quality of rice. The hardest hit plots yield more than 10%. From 1999 to 2000, we made a preliminary study on its characteristics and control measures. 1 happened?