芋艿是沿江地区特色蔬菜,深受广大城乡居民消费者欢迎。而疫病是芋艿主要病害之一,严重影响芋艿的产量和品质。疫病主要为害叶片和球茎,叶片上初生的病斑为黄褐色斑点,后扩大融合成圆形或规则形的大斑,病斑有明显的同心轮纹,湿度大时,斑面可见一层白色霉状物,在坏死组织上分泌有黄色至淡褐色液滴,后期病斑多从中央腐败成裂孔,严重受害的叶片仅残留叶脉呈 Taro is the characteristics of vegetables along the Yangtze River, welcomed by the majority of urban and rural consumers. The disease is one of the major diseases Taro, taro tar yield and quality seriously affected. Blight mainly damage leaves and corms, leaf lesions on the primary spot for the brown spots, after the enlargement of the merged into a round or regular-shaped spots, the lesions have obvious concentric ring pattern, the humidity is large, the surface can be seen a white layer Moldy, in the necrotic tissue secreted yellow to pale brown droplets, the late spot more corrupt into holes from the central, severely damaged leaves only residual veins was