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在两年重茬油菜田内调查结果表明：油菜菌核病发病率与子囊盘田间密度有极显著的相关性。利用回归方程＾ｙｐ＝１００／（１＋ｅ２８１５９－０３４１７ｘ）和＾ｙｓ＝１００／（１＋ｅ２８６４８－０２７４４ｘ）可预测菌核病的病株率＾ｙｐ和病茎率＾ｙｓ。油菜菌核病子囊盘密度３个／ｍ２以下时，为中等偏轻发生；４～５个／ｍ２时，为中等偏重发生；６个／ｍ２以上时为大发生。
The results of two years of continuous cropping rape field showed that the incidence of sclerotinia sclerotiorum had a very significant correlation with the field density of ascus. Using the regression equation ^ yp = 100 / (1 + e2 8159-0 3417x) and ^ ys = 100 / (1 + e2 8648-0 2744x) can predict the sclerotinia disease plant rate ^ yp and disease stem rate ^ ys. When the density of rape mycelium was less than 3 per m2, it was moderate to moderate; 4 to 5 per m2, moderate to severe, and over 6 per m2.