trimming pecan trees
i have an old pecan tree that has rotten spots where it has been trimmed before.Should the should the rotten holes be plugged with something? Should trimmed branches be painted with something? What is the right time of year to trim?
Aransas County Texas
There is no real benefit in plugging those rotten spots unless they are holding water or soil. If so, you could fill them with quickcrete if you want to. Trimmed pecan branches do not need to be painted - the only time we recommend painting pruning cuts is for oak trees (to prevent the spread of oak wilt which is NOT in Aransas County at this time) in which case it should be done immediately after cutting.
If you have to cut a very large branch (or as a precaution against disease), you can apply copper hydroxide to a pruning cut on any tree.
You can do light pruning any time of year on pecans, but heavy pruning (never more than 1/3 of the tree) should be done in the late fall or the spring.
(Oaks should only be pruned if really needed, and should NOT be pruned from January to June.)