玉米大斑病的流行原因与综合治理措施

Epidemic causes of Exserochilum turcicum and its integrated management measures

1990～2004年,玉米大斑病在忻州滹沱河流域的6个县(市、区)有4年大流行。其中2004年发病面积9万hm2,因病害减产约49500t。根据多年系统观察,发现病害的发生与流行和作物茬口、品种抗病性、气象条件、耕作管理等密切相关。控制该病害,必须在选育抗病品种的同时,大力推广秋深耕、轮作倒茬、增施农家肥、做好病情测报、适时喷药控制田间中心病株等综合治理措施。

Exserochilum turcicum has four years’outbreaks from 1990 to 2004 in six counties, Hutuo river valley, Xinzhou city. Occurring area was 90,000 hm2 in 2004, which led to corn yield loss of 49,500 tons. The occurrence and outbreak of Exserochilum turcicum had close relation with the previous crop, host resistances, climate, cultivation management and so on, which was discovered through observation for many years. IPM measures, such as cultivating resistant varieties, deep plough, rotation, applying organic fertilizer, doing well in forecasting, spraying pesticide in time to control the inoculum’s plants are promoted.