麦茬直播夏玉米,苗期与当地雨季相吻合,易引起玉米苗枯病发生危害。近几年发生危害呈上升趋势逐渐加重,特别是2003年降雨频繁、雨量大,我区夏玉米苗枯病普遍发生熏且发病更严重,轻者减产20%～30%,严重的减产50%左右,甚至绝产。现将夏玉米苗枯病的发生防治措施介绍如下。1.发病 Wheat stubble live summer maize, seedling stage coincides with the local rainy season, easily lead to corn seedling blight harm. In recent years, the hazard is on the rise, especially in 2003 with frequent rainfall and heavy rainfall. The incidence of summer maize blight in our district is more common and the incidence is more serious. The light output is reduced by 20% to 30% and the output is reduced by 50% Left and right or even dead. Now the occurrence of summer corn seedling disease prevention measures are described below. 1. onset