一、苦瓜枯萎病苦瓜整个生长期都能发生，而以结瓜期发病最重。幼苗发病，茎基部变褐色缢缩，干叶萎蔫下垂，严重时猝倒死亡。成株发病，病株生长缓慢，中午萎蔫，早晚恢复，持续几天后，全株萎蔫枯死。病株茎基部表皮粗糙且多纵裂，有些呈水渍状腐烂或呈褐色，潮湿时长有粉红 First, the bitter melon wilt Bitter melon can occur throughout the growing season, and the incidence of the most serious melons. Emergence of seedlings, the base of the brown hair shrunk, dry leaves wilting sagging, catastrophic death in severe cases. Adult disease, slow growth of diseased plants, wilting at noon, morning and evening recovery, continued for a few days, the whole plant wilted dead. The diseased stem base epidermis rough and more longitudinal crack, some water-like decay or brown, wet longer pink