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在甜菜生长季节,气温高、湿度大容易发生褐斑病。发病后的甜菜一般减产10％左右,含糖量降低1～2度。
In the sugar beet growing season, high temperature, humidity is prone to brown spot. After the onset of the general reduction of sugar beet about 10%, reduce the sugar content of 1 to 2 degrees.