| Estimated yield loss given detectable disease (1%) at different canopy levels during head emergence | |||
|---|---|---|---|
| Modified from Lipp, P. E. and Madden, L. V.; Phytopathology 79:462-470. | |||
| Varietal Reaction | Third Leaf | Second Leaf | Flag Leaf |
| Susceptible | 6% | 16% | 25% |
| Moderately Susceptible | 4% | 10% | 16% |
| Moderately Resistant | 2% | 5% | 8% |
| Resistant | - | - | - |
A disease level of 1% is equal to approximately 2 or 3 pustules per leaf. Estimates of yield loss are based on 6 varieties over 3 years.