Table 1.

Percent of failures occurring in each region for control branches and watersprouts in silver maple trees converted from round-over to V-trim during electrical line clearance operations.

TreatmentNo failure (%)Beyond POAz (%)At POAy (%)Near POAx (%)Leader (%)
Control7733530
Watersprout88333121
  • z Beyond POA = failure occurred along the branch/watersprout and further than two diameter lengths from the point of attachment (POA).

  • y At POA = failure occurred at the point of attachment of branch/watersprout to parent stem (leader).

  • x Near POA = failure occurred along the branch/watersprout but within two diameter lengths from the point of attachment.

  • Leader = main leader broke before watersprout.

  • The table is adapted from a previous publication by the author (Dahle et al. 2006).