Damage by European hornets to various species and geographic sources of white-barked birches (Betula)—1984
| Sources | Trees Damaged | ||||
|---|---|---|---|---|---|
| Species origin | Number | North Latitude | Number | Percent | |
| B. papyrifera | 4 | 45° | 0/28 | 0 | |
| B. populifolia | 1 | 41° | 1/23 | 4.3 | |
| B. pendula | 5 | various | 4/26 | 15.3 | |
| Belgium1/ | (1) | 51° | (2/4) | (50.0) | |
| Corsica1/ | (1) | 42° | (0/8) | (0) | |
| B. pubescens | |||||
| Belgium | 2 | 50° | 0/23 | 0 | |
| Turkey | 1 | 40° | 4/15 | 26.6 | |
| B. platyphylla | 5 | 36° | 15/41 | 36.6 | |
↵1 Included in species total.