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一、发病症状主要为害莲藕叶片,以浮贴水面的叶片受害严重。叶片发病初为绿褐色小斑,后扩展成圆形、椭圆形或不定形黑褐色湿腐状病斑,病斑颜色分布不均匀,多个病斑相互连接致叶片变褐腐烂或干缩,贴水叶片不能抽离水面。严重时叶柄亦坏死腐烂。二、防治方法农业防治因地制宜选育和种植抗病品种,勿栽带病秧苗,发
First, the incidence of symptoms of the main damage to lotus leaf blade to the water surface of the leaves seriously affected. Leaf early onset of small green spots, after the expansion into a round, oval or amorphous dark brown wet rot lesions, spot color unevenly distributed, multiple lesion interconnected leaves brown rot or shrink, Agreed leaves can not be pulled out of the water. Petiole is also rotten necrosis when severe. Second, the prevention and treatment methods of agricultural prevention and control according to local conditions breeding and planting resistant varieties, not planted with sick seedlings, hair