| Score | Percent Disease (%) | Host Response |
| 1 | 1 - 5 | Highly Resistant |
| 3 | 6 - 12 | Resistant |
| 5 | 13 - 25 | Moderately Resistant |
| 7 | 26 - 50 | Moderately Susceptible |
| 9 | 51 - 100 | Susceptible |