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目前,小麦白粉病已成为我国小麦生产上发生为害面积最大的病害。然而该病对小麦产量的影响程度究竟应该作何评价,迄今为止,报道不多。Large和Doling(1963)曾提出小麦白粉病对产量的损失约为10.5生长阶段(相当于扬花期)的白粉病发病率平方根的二倍(L=2M~(1/2))。但其四年的试验中,发病轻微。因此,该模式只能适用于轻病类型的年份或田块,不能反映早发重病类型年份或田块白粉病对产量的损失情况。
At present, wheat powdery mildew has become the most harmful disease in wheat production in our country. However, the impact of the disease on the yield of wheat what should be evaluated, so far, few reports. Large and Doling (1963) have proposed that wheat powdery mildew yield is twice as large as the square root of the incidence of powdery mildew (L = 2M ~ (1/2)) during the growth phase (equivalent to the flowering period) But in its four-year trial, the disease was mild. Therefore, this model can only be applied to the year or pluripotent disease type, can not reflect the early onset of serious illness type or field powdery mildew on the yield loss.