Trying to decide if I should cut back below the borer hole. Please advise. (My other trees have mature leaves now so its much slower to leaf out.)

First picture is the tree.
Second picture is the branch removed that had a borer hole. Beige in first picture.
Third picture is the borer hole on the main trunk. Red circle in first picture.      

Maybe you could try to squirt some insecticide into the borer hole and hope it kills it.  After all, that is a fresh hole, so the little bugger should be right there...
Jim

Do you have an ID on that horrible little bugger yet?

can you root the pieces that are still good?

Hi barnhardt9999,
To your knowledge, are there lots of those beetles at your place ?
Do you have some insecticide or baits to kill these beetles ?

Cutting the tree if there are other insects around won't help much IMO .
I would leave the tree and get rid of the insects - if there is another mean to do so.
In last choice, then cut the tree ...

I sprayed pesticide in the hole then painted over with latex paint. I did not notice any other beetle holes on any of my other trees.

stick a thin wire in there and thread it until you will soft cushy thing.. and feel the wire going through it. make sure to wiggle it around and poke it few more times. then pull the wire out, then spray pesticide on the end and do it again. i'm sure that will kill that sucker for sure. and plug the hole. :)