SCORE |
SYMPTOMS |
DESCRIPTION |
1 |
 |
Clean. No visible symptoms |
2 |
 |
Fine chlorotic specks, but vigorous plants |
3 |
 |
Mild chlorotic streaks on emerging leaves |
4 |
 |
Moderate chlorotic streaks on emerging new leaves |
5 |
 |
Chlorotic streaks and mottling throughout plant |
6 |
 |
Intense chlorotic mottling throughout plant, necrosis of leaf margin |
7 |
 |
Excessive chlorotic mottling, mosaic and leaf necrosis. At times dead heart symptoms. |
8 |
 |
Excessive chlorotic mottling, leaf necrosis, dead heart and premature death of plants. |
9 |
 |
Complete plant necrosis, and dead plant. |