估计是白锈病。对该病害的预防,可在播种前用种子量0.3%的35%甲霜灵拌种。发病初期,用58%甲霜灵・锰锌可湿性粉剂500倍液,或50%甲霜铜可湿性粉剂600倍液,或72.2%霜霉威水剂800倍液,每隔7-10天喷茎叶,连续用药2-3次。