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上海是全国棉花亩产最早超过百斤皮棉的高产地区之一,也是棉花品种岱字15、沪204的全国棉花良种繁殖基地。但目前棉花枯萎病蔓延迅速,危害日益严重,今年发病面积高达37.8441万亩,因病绝产的面积达五千余亩,皮棉损失达150～200万斤。同时棉花黄萎病已在局部地区发生。棉花枯萎病、黄萎病都是真菌性病害。前者属镰刀菌,后者属轮枝菌。这两种病害的传播途径,以及对棉花的危害方式相同,是由病菌在土壤中侵入棉花的根部,沿根、茎
Shanghai is one of the earliest high-yielding areas in China that produce over 100% of cotton lint per mu and is also the national cotton seed multiplication base for cotton varieties Dai-Dai 15 and Shanghai-204. However, the current rapid spread of cotton wilt disease, the increasingly serious harm, the incidence of up to 37.8441 million mu of this year, due to disease over 5,000 acres of area, lint loss of 150 to 200 kg. Verticillium wilt also occurred in some areas at the same time. Fusarium wilt, Verticillium wilt are fungal diseases. The former belongs to Fusarium, the latter belongs to Verticillium. The transmission of these two diseases, as well as the same way they endanger the cotton, are caused by germs invade the roots of the cotton in the soil,