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从1972年开始,我们公社的甘薯上发生了烂根开花病,1975年蔓延到11个大队,发病面积800多亩,其中400亩无收,300亩减产70—80%,100亩减产20—50%。公社党委多次组织农技站和各农科队,先后对全社17个大队157个生产队,逐队逐块进行调查研究,分析发病原因,总结防治方法。1976年基本控制了烂根开花病的蔓延,压缩了发病面积,减轻了为害。甘薯烂根开花病主要发生在大田栽插后的初期。春薯栽后20—30天,夏薯栽后10—15天开始出现症状,病株下部叶片卷缩发黄、发脆、心叶老化缩小,薯苗茎梗发软,
Since 1972, rotting root blight has occurred on sweet potato in our commune. In 1975, it spread to 11 brigades with a disease area of over 800 mu, of which 400 mu were not collected, 70 to 80% were cut down from 300 mu, 20 to 100 mu was cut, 50%. The commune party committee organized the agrochemical station and each agricultural team many times, and successively conducted 157 production teams of 17 brigades of the whole society, conducted investigation and study block by block, analyzed the causes and summarized the prevention and treatment methods. In 1976 the basic control of the spread of rotten root blight, reducing the incidence of disease, reducing the damage. Rotten root blight of sweet potato occurred mainly in the early days after planting. 20-30 days after planting of spring potato, 10-15 days after planting of summer potato, symptoms begin to appear. The lower part of the diseased plant leaves curl yellowish, crisp, the aging of heart leaf is reduced,