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芋疫病是芋类的毁灭性病害。此病主要发生于叶片、有时也会为害叶柄。其症状是发病初期,叶片上发生圆形暗色或褐色小斑,小斑向四周扩大,形成轮纹大斑,叶背轮纹最明显,斑点外围有白色的霉状物,斑上沿叶脉分泌黄色的液滴或凝成粒状,斑外呈暗绿色小渍状和黄色的环带,病斑扩大时常形成不规则的大斑
Taro disease is a devastating disease of taro. The disease occurs mainly in the leaves, sometimes pests. The symptoms are early onset, the occurrence of circular dark brown or brown spots on the leaves, small spots to the surrounding expanded to form a large spotted round pattern, leaf back pattern most obvious, the spot has a white mildew on the periphery, the spot along the veins secreted Yellow droplets or condensed into granular, extramacular dark green small stains and yellow ring, the lesion is often enlarged to form large irregular spots