| Code | Definition | Number of Accessions |
| 2 | (2) Moderate number of lesions per leaf below ear. | 25 |
| 3 | (3) Numerous lesions on leaves below the ear, but no evidence of lesion coalescence. | 104 |
| 4 | (4) Numerous lesions with some killing of patches of leaf tissue below the ear. | 141 |
| 5 | (5) Whole leaves killed up to the ear and some disease evident above the ear. | 59 |
| 6 | (6) Heavy disease over whole plant, some leaves above the ear severely infected. | 14 |
| 7 | (7) Heavy disease over whole plant and some leaves above the ear killed. | 4 |