夏谷锈病流行规律研究初报

近年河北省谷锈病逐年加重,给夏谷生产造成严重损失,尤其发病早的地块减产较重,甚至绝收。该病在夏价产区田间流行呈典型的“Ｓ”开曲线。病害流行与否阳决于夏谷生育期的雨量、雨次及其分布,夏谷品种抗病性和环境。防治技术为播种前处理还病谷草,大面积种植抗病品种,多雨年份在发病中心形成期喷药防治。

A Premilinary Study on the Epidemic Characteristics of Millet Rust

The millet rust has been becoming more serious in recent years in Hebei Province. It makes great losses to millet productionlesp. in the fields where the disease oc-cur earlier, the loss is heavier, even without gains. In main millet-production area, the dis-ease epidemic curve is typical "S" type. The epidemic degree deponds on the factors such as rainfall, rain times, resistance of millet varieties, and environment. The controlling methods are: removing diseased millet straw before sowing, planting resistant varieties widely,spraying pesticide in th diseased area during the forming period.