一、问题的提出玉米丝黑穗病是国内当前玉米生产上的重要病害之一。我省每年都有损失,近年仍在5～10%,有些地区大面积损失达15%以上。综合防治是防治本病的正确方向,但在综合防治中,有些环节受其它因素牵制较大,贯彻尚存在一定限制,如:(1)应用抗病品种是有效的途径,但品种的抗病性首先要照顾到对大小斑病的抗病性,现有推 First, the problem put forward Corn head smut is currently one of the major diseases on the corn production. Every year, our province has suffered losses, and it is still 5 to 10% in recent years. In some areas, the loss of large areas has reached over 15%. Integrated prevention and control is the correct direction for the prevention and treatment of this disease. However, some aspects of comprehensive prevention and control are greatly restrained by other factors and there are still some restrictions in implementation. For example, (1) the use of resistant varieties is an effective way, Sex first to take care of the resistance of the size of the disease, the existing push