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一、概况大通湖地区位于长江中游平原,洞庭湖区的中心地带,地势平坦低洼,气候温和雨水充沛,土地肥沃,适宜种植粮食、棉花、甘蔗等作物。据报道甘蔗黑穗病于1877年首先在南非的那塔尔发现后传播到日本、中国、印度、毛里求斯、印尼、菲律宾、阿根廷等国。一般发病率达10～20%,严重的80～90%,几乎达到毁灭的程度。我省广大蔗区都有发生,特别是滨湖蔗区发生较为普遍,我场自1970年以来从广东
I. Overview Datong Lake area is located in the middle reaches of the Yangtze River Plain, the heart of Dongting Lake area, flat and low-lying, mild climate with abundant rainfall, fertile land, suitable for planting crops such as grain, cotton, sugar cane. Sugarcane smut is reported to first spread to Japan, China, India, Mauritius, Indonesia, the Philippines, and Argentina after it was first discovered in Natal in South Africa in 1877. The general incidence of 10 to 20%, severe 80 to 90%, almost to the extent of destruction. The vast majority of sugarcane areas in our province have occurred, especially in the creek area where the occurrence of more common, my field since 1970 from Guangdong