芡实瘟病为芡实的重要病害,种植地区发生分布,春、夏、秋季都可发病,以夏季闷热天较多,发病重。主要为害叶片,严重时亦侵染花器。初在病部出现形状不规则的褐色小点,以后扩展成不定形黄褐色至暗褐色坏死斑,短期内致叶缘坏死腐烂。花器染病,呈褐色不规则坏死,以后软化腐烂,最后仅剩纤维组织和种子,其上可产生灰白至黄褐色菌丝团,最后 芡 real blast as a real important disease, the distribution of planting areas, spring, summer and autumn can be onset, the summer hot days more, severe onset. The main damage leaves, in severe cases also invaded flower. At the beginning of the disease appeared irregular brown spots, later expanded into amorphous brown to dark brown necrotic spots, causing the edge of leaf necrosis decay in the short term. Floral disease, brown irregular necrosis, after softening decay, the last remaining fibrous tissue and seeds, which can produce gray to yellow brown mycelium, and finally