枣庄市玉米常年种植面积10万hm2,其中夏直播8.6万hm2,无水浇条件地块占70%以上。近年来,夏玉米苗枯病发生有加重趋势,成为本市玉米上的主要病害之一。一般病地的病株率10%～18%,严重地块达20%～50%,个别地块高达60%以上,甚至绝产,对玉米生产造成威胁。1症状玉米苗枯病主要由串 Zaozhuang corn perennial planting area of ​​100,000 hm2, of which 86,000 hm2 live in summer, no water conditions of land accounted for more than 70%. In recent years, the occurrence of summer maize blight has aggravating trend, becoming one of the main diseases on maize in this city. The average disease rate of diseased plants 10% to 18%, a serious block up to 20% to 50%, individual plots up to 60% or more, or even abortion, a threat to the production of corn. 1 Symptoms Corn seedling blight is mainly caused by skewers