莲藕得了腐败病。主要危害地下茎部,产生不规则的紫黑色或褐色的病斑,病茎被害部位纵皱或者腐烂。从病茎抽出来的叶片颜色变淡,叶缘开始产生褐色干枯,整叶最后卷转枯死,叶柄也跟着枯死,在靠近顶端处多向下弯曲。发病轻者,结藕延迟,造成减产,重者绝收。 Lotus root got rotten disease. The main harm to underground stems, resulting in irregular purple black or brown spots, sick stems wrinkled or decay. The leaf color of the leaves from the diseased stems fades, the leaf edges begin to brown and dry, the entire leaf turns to wither, the petioles also withered, bending more downwardly near the top. Slight onset, coupled lotus root delay, resulting in reduced production, and those who receive the most.