玉米弯孢菌叶斑病是在玉米大、小斑病基本控制后新发生的又一种叶部重要病害。1994年以来,该病先后在北京、河北、山东、陕西、辽宁南部普遍发生,减产幅度10％～20％或更高。我省局部地区也已发现,应当注意识别,关注其发展动态。 Curvularia lunata leaf spot disease is another important disease in leaves after the basic control of large and small spot of corn. Since 1994, the disease has successively occurred in Beijing, Hebei, Shandong, Shaanxi and Liaoning, with a reduction of 10% -20% or more. Some areas in our province have also found that we should pay attention to identify and pay attention to their development.