I cut off a branch earlier this year as it was obviously dead and dying quickly. Other parts of the tree are OK. It's a very old peach tree. I see now some bored tunnels through the middle of the branch....any idea how to fix? How about what caused it...I dont' see anything down those holes.
![276852050_16c19bbedf.jpg](https://proxy.imagearchive.com/efd/efdb4baed0028aa84adcb57d6e30ce43.jpg)