Branch failures by month
The database (September, 2011) contains 1878 reports of branch failures for which a date is recorded. Eight genera have 87 or more branch failure reports. The following table lists the percentage of failures that occurred for each genus for the periods May-October and November-April.
| May-Oct | Nov-Apr | Number of reports | |
| Cedrus | 60% | 40% | 87 |
| Cupressus | 21% | 79% | 222 |
| Eucalyptus | 38% | 62% | 293 |
| Fraxinus | 62% | 38% | 124 |
| Liquidambar | 67% | 33% | 92 |
| Pinus | 51% | 49% | 287 |
| Quercus | 60% | 40% | 297 |
| Ulmus | 67% | 33% | 100 |