Symptom | Disease rating | Disease index (%) | Disease reaction Immune |
No symptoms (healthy plant) | 0 | 0 | Resistant |
Small scattered vein thickening only | 1 | 0.1 - 10 | Highly tolerant |
Large group of vein thickening and curling or top of the plant affected | 2 | 10 - 30 | Tolerant |
All vein thickening and sever leaf curling or half of the plant affected. | 3 | 30 - 50 | Susceptible |
All vein thickening, sever Leaf curling, enation and stunting of the plant or whole plant affected. | 4 | >50 | Highly susceptible |