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瓜类枯萎病又称萎蔫病,是瓜类作物危害最重的土传病害,全国各地均有发生。黄瓜、西瓜、冬瓜发病最重,甜瓜次之,南瓜很少发病。一、发病症状病菌在土壤、病株残体、种子及未腐熟的带菌粪肥中越冬。苗期发生病,幼苗出土后子叶萎蔫,真叶褪绿黄枯,茎基部变褐缢缩,猝倒死亡。成株期发病,病株生长不良,植株矮化,叶小色暗绿,并由下而上逐渐褪绿黄枯,以后全株或局部瓜蔓白天萎蔫,早晚恢复,5—6天后逐渐枯萎死
Fusarium wilt, also known as wilt disease, is the hardest hit by melons and soil-borne diseases, all over the country have occurred. Cucumber, watermelon, melon most incidence, followed by melon, pumpkin rarely sick. First, the symptoms of pathogens in the soil, diseased plants residues, seeds and not decomposed with manure in winter. Seedling disease, cotyledon wilt after excavated seedlings, true leaves chlorotic yellow withered, stem base browning shrinking, cataplexy death. Adult disease, poor growth of diseased plants, dwarf plants, dark green leaves, and gradually from the bottom green faded yellow, after whole plant or local melon during the day wilt, morning and evening recovery, gradually wilt 5-6 days dead