| Plant species | % of total plants | % of total problems | % of plants with problems |
|---|---|---|---|
| Thuja occidentalis | 20.4 | 4.1 | 7.6 |
| Juniperus spp. | 8.3 | 1.5 | 6.7 |
| Picea glauca | 5.9 | 1.1 | 7.1 |
| Lonicera tatarica | 5.6 | 14.2 | 95.0 |
| Spiraea x vanhouttei | 5.5 | 3.8 | 2.6 |
| Lonicera xylosteum | 4.3 | 0.0 | 0.0 |
| Fraxinus pennsylvanica | 3.7 | 8.6 | 88.5 |
| Potentilla fruticosa | 3.5 | 0.0 | 0.0 |
| Syringa vulgaris | 3.2 | 6.7 | 78.3 |
| Picea pungens | 3.2 | 3.4 | 39.1 |