Rating scale for leaf quality evaluation.
| Rating scale | Comment |
|---|---|
| 1 | Leaves and twigs dead |
| 2 | Leaves yellowed, large necrotic areas, some to severe leaf drop, and severe epinasty of remaining foliage |
| 3 | Moderate epinasty of the foliage, moderate leaf necrosis, and slight leaf drop |
| 4 | Only minor cupping of the leaves, no cupping or necrosis associated with treatment, and no leaf drop observed |
| 5 | No yellowing, no leaf drop, no cupping or necrosis associated with treatment, and good leaf color appropriate for the species |