Percentage of parent stems (leaders) in each distance class (cm) in which (A) internal and (B) external decay began from the heading cut in silver maple leaders converted from roundover to V-trims during electrical line clearance operations.
| A. Internal decay | ||
|---|---|---|
| Distance (cm) | No. of leaders | Percentage with decay |
| 0 | 32 | 46.4 |
| 1 to 50 | 23 | 33.3 |
| >50 | 7 | 10.1 |
| No decay | 7 | 10.1 |
| B. External decay | ||
|---|---|---|
| Distance (cm) | No. of leaders | Percentage with decay |
| 0 to 50 | 41 | 59.4 |
| 51 to 100 | 5 | 7.2 |
| >100 | 9 | 13.0 |
| No decay | 14 | 20.3 |