Five least problem prone trees and shrubs of the 30 most common ones encountered in 6 Maryland communities in 1982.
| % of plants with problems | |
|---|---|
| Tree | |
| Black locust | 0 |
| Black gum | 0 |
| White oak | 3 |
| Tulip poplar | 4 |
| Hickory | 4 |
| Shrub | |
| Yew | 0 |
| Honeysuckle | 0 |
| Barberry | 6 |
| Arborvitae | 7 |
| Viburnum | 8 |