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棉花枯萎病菌随病籽传播,一旦定居土壤,铲除极难。重病田内的棉花受害最重,产量损失也最大。碧溪公社十一大队十队,1965年发现有零星棉花枯萎病,嗣后发病面积逐年增加,病情日趋严重,1973年发病面积占棉田总面积的63.5％,不能立苗的重病田占总面积的5.65％。1966年皮棉亩产189斤,1967年以后几乎每年下降20斤,1972年平均亩产只有82.3斤。自1973年起,试种抗病棉后,病情基本控制,产量也几乎每年上升20斤,1975年皮棉亩产144.1斤,1976年,气候条件虽然不利,皮棉产量也达到了125.1斤。因此,选用抗病品种确实是综合防治重病田,夺取棉花高产的有效措施。
Cotton Fusarium wilt spread with the disease, once settled in the soil, eradication extremely difficult. The worst cotton crop in the field has suffered the most, with the most yield loss. Bixi commune eleven brigade tenth team, found in 1965 sporadic cotton wilt disease, the subsequent incidence of the area increases year by year, the condition is getting worse, the incidence of the disease accounted for 63.5% of the total area of cotton fields in 1973, can not stand seedlings of serious diseases accounted for the total area 5.65%. In 1966, lint yield 189 pounds, after 1967 dropped almost 20 pounds a year, the average yield in 1972 was only 82.3 kg. Since 1973, the test of disease-resistant cotton, the basic control of the disease, the output rose almost 20 kg per year in 1975, lint yield 144.1 kg, 1976, although the adverse weather conditions, lint yield reached 125.1 kg. Therefore, the selection of resistant varieties is indeed a comprehensive prevention and treatment of serious disease, to seize the cotton yield effective measures.