Ohio State University Extension/Research

Improving Wheat Yields in Ohio


Table 10: Predicted Percentage Yield Loss to powdery Mildew Based on Varietal Susceptibility and Disease Level

---- decetable disease (1%) at Head Emergence ----  
Varietal Reaction
Flag Leaf
Leaf Two
Leaf Three
Susceptible 25% 16% 6%
Moderately Susceptible 16% 10% 4%
Moderately Resistant 8% 5% 2%
Resistant --- --- ---
1% disease = 2 to 3 powdery mildew lesions per leaf.
Percentage yield loss based on six varieties over three years.


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