Major stem and foliage problems In Norway, silver, and sugar maple street trees.
| Condition | Norway maple | Sliver maple | Sugar maple |
|---|---|---|---|
| Incidence in Percent | |||
| Stem problems—Syracuse | |||
| large wounds | 12 | 7 | 8 |
| broken branches | 3 | 8 | 5 |
| broken branch stubs | 38 | 32 | 29 |
| pruning branch stubs | 25 | 22 | 15 |
| Nectria cinnabarina | 2 | 0 | 0 |
| target nectria | 0 | 0 | 2 |
| Eutypella parasitica | 2 | 0 | 3 |
| heart rot | 25 | 28 | 34 |
| sap rot | 13 | 3 | 5 |
| seam | 20 | 9 | 14 |
| Foliage problems—Syracuse | |||
| scorch | 17 | 2 | 24 |
| necrotic fleck | 12 | 0 | 4 |
| chlorosis | 25 | 33 | 38 |
| chlorotic fleck | 15 | 6 | 8 |
| interveinal chlorosis | 1 | 28 | 8 |
| chlorotic, tufted and small | 6 | 0 | 7 |
| wilted | 20 | 7 | 28 |
| fall coloration | 3 | 8 | 13 |
| mites | 0 | 20 | 0 |
| aphids | 19 | 0 | 1 |
| None, normal foliage | 10 | 16 | 6 |
| 1 Ratings: 0 to 9 | |||
| Average stem condition | |||
| Syracuse | 2.0 | 1.5 | 2.2 |
| Rochester | 1.6 | 1.4 | 1.4 |
| Average foliage condition | |||
| Syracuse | 2.1 | 1.5 | 1.9 |
| Rochester | 1.5 | 1.0 | 2.5 |
↵1 Varies from good (0) to bad (9).