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甜菜褐斑病是甜菜的重要病害,我国各甜菜产区发病普遍,为害严重。主产区黑龙江(中部、南部)、吉林、内蒙、辽宁等省区一般可使块根产量降低10—20％,含糖降低1—2度,茎叶损失40—70％。山东、江苏、河北因气温、雨量适宜发病,为害尤其严重。春甜菜可减产30—50％,含糖降低2—4度。近几年病势逐渐加重,成为发展甜菜生产的主要威胁。因此,有效地防治甜菜褐斑病的为害,迅速改变我国甜菜产量低、含糖低的局面,是当前生产上急待解决的问题。
Beetle leaf spot is an important disease of sugar beet. The incidence of each sugar beet producing area in our country is widespread and serious damage. The main producing areas of Heilongjiang (central and southern), Jilin, Inner Mongolia, Liaoning and other provinces and regions can generally reduce root yield 10-20%, 1-2 degrees lower sugar, stems and leaves 40-70% loss. Shandong, Jiangsu, Hebei, due to temperature, suitable for the onset of rainfall, the damage is particularly serious. Spring beet can cut 30-50%, reducing sugar 2-4 degrees. In recent years, the disease gradually increased, becoming the main threat to the development of sugar beet production. Therefore, the effective prevention and control of sugarbeet brown spot disease, rapid changes in China’s sugar beet low yields and low sugar situation is the current production of urgent problems to be solved.