Percent of stem decay by species In street trees In Central New Jersey and park trees In Central Park, New York.
| Species | No. sampled | % decay | ||
|---|---|---|---|---|
| NJ | NY | NJ | NY | |
| Honeylocust(Gleditsia sp.) | 46 | — | 2.2 | — |
| Planetree, London (Platanus x acerlfola) | 26 | 6 | 7.7 | 0 |
| Ailanthus (Ailanthus altissima) | — | 26 | — | 7.7 |
| Oak (Quercus) | ||||
| Pin (palustris) | 36 | 37 | 11.1 | 5.4 |
| Red (borealis) | — | 43 | — | 6.9 |
| Turkey (cerrls) | — | 16 | — | 43.8 |
| Weighted mean of oaks | 12.5 | |||
| Ash (Fraxinus) | ||||
| Green (pennsylvanica) | 35 | — | 11.4 | — |
| White (americana) | — | 78 | — | 12.8 |
| Locust, black (Robinia pseudoacacia) | — | 74 | — | 16.2 |
| Hackberry (Celtis sp.) | — | 36 | — | 16.7 |
| Maple (Acer) | ||||
| Sycamore (pseudoplatanus) | — | 63 | — | 9.5 |
| Red (rubrum) | 59 | — | 10.2 | — |
| Sugar (saccharum) | 54 | — | 14.8 | — |
| Norway (platanoldes) | 92 | 133 | 15.2 | 20.3 |
| Silver (saccharinum) | 51 | — | 19.6 | — |
| Weighted means of maples | — | — | 14.8 | 16.8 |
| Ginkgo (Ginkgo biloba) | — | 28 | — | 17.8 |
| Hawthorn (Crataegus sp.) | — | 20 | — | 30.0 |
| Linden (Tilia sp.) | 23 | — | 30.4 | — |
| Cherry, ornamental (Prunus sp.) | — | 32 | — | 34.3 |
| Total | 422 | 592 | ||
| Weighted mean of trees with stem decay | 12.6 | 16.2 | ||