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根据土壤黄萎病病原体水平确定黄萎发病率和棉花产量损失之间的关系播种期大丽花轮枝孢病原体密度(每克土繁殖体个数),用于两个品种连续3年的试验结果绘制而成的发病率(致萎品种叶部症状百分数)曲线非常接近反指数曲线Y=57.09(1-e-0.351:x)。当...
Relationship between Verticillium wilt incidence and cotton yield loss based on the level of pathogen of Verticillium dahliae Sowing Density (number of multiparities per gram of soil) of Verticillium dahliae at sowing time was plotted for test results for two consecutive years for three years The resulting incidence (leaf percentage of withered varieties) curve is very close to the inverse exponential curve Y = 57.09 (1-e-0.351: x). when...