In an earlier post I showed winter damage to a tree in my back yard. Here is the update, after carefully cutting the branch off at the base, I will leave the tree to heal. I will not treat it unless there is a problem with it healing. In the weeks to come, I will check on it continually to ensure that it has become diseased or infested with insects. Although the damage is considerable to the branch, it is actually a good time for it to heal, since there are few insects around at this time of year and the thaw has not happened so the sap has not started running. I would be much more concerned if it was later in the season and the sap was running and the insects were out as it could easily draw insects to its wound.
And although this is quite a big wound, the tree will be none the worse for wear if I have to cut the entire branch off. The most important thing to do is to keep checking the tree as it heals. The branch actually has two other healthy branches forking off of it, so I really would like to give the branch a chance to heal. The other branches that were broken were much smaller so it was just a matter of cutting them off.