长治市郊区玉米播种面积逐年增加,然而玉米丝黑穗病的为害随之加重,根据1999～2001年在郊区故驿、关村、堠西庄抽样调查,病株率依次为11％～15％,15％～20％和17％～20％,最严重的地块病株率为50％以上,造成玉米大面积减产,甚至绝收。为此我站对该病发生原因和防治对策进行了初步探讨。 The sown area of ​​maize in the suburbs of Changzhi City increased year by year, however, the maize head smut damage subsequently increased. According to the sampling survey conducted in the suburbs of Guyi, Guancun and Xixizhuang from 1999 to 2001, the rate of diseased plants was 11% ~ 15% 15% ~ 20% and 17% ~ 20%, the most serious land-mass rate of more than 50%, resulting in large-scale production of corn, or even absolute. To this end I stand on the cause of the disease and prevention and treatment of a preliminary discussion.