Trees

Question

Two big branches of an elm broke. What can I do about the exposed part of the trunk to protect it from bug and severe cold weather.

Answer 1

Ragged, broken edges need to be pruned off. Look for the bark collar when deciding where to cut. If you lost large branches from the main trunk, elliptical-shaped cuts are made on the top and bottom. This is best left for a tree professional. Painting wounds is not recommended anymore. They cause more problems than they help. I have read that shellac is OK but don't use tar-based wound paint or house paint. Both are detrimental. Here are tips from the Arbor Day Foundation on storm-damaged trees.
https://www.arborday.org/media/stormrecovery/4_treefirstaid.cfm
https://www.arborday.org/trees/tips/keys-to-pruning.cfm