| Code | Definition | Number of Accessions |
| 1 | no disease symptoms and completely healthy | 8 |
| 2 | between 0-10% leaf surface area showing disease symptoms | 9 |
| 3 | 10% leaf surface area showing disease symptoms | 14 |
| 4 | between 10-25% leaf surface showing disease symptoms | 20 |
| 5 | 25% leaf surface area showing disease symptom | 20 |
| 6 | about one third surface area showing disease | 33 |
| 7 | 50% leaf surface area showing disease symptoms, and severely stunted | 63 |
| 8 | more than half leaf area diseased, but not dead | 71 |
| 9 | caused plant death | 74 |