I've only had this cherry tree for a little over 2 years now. The bark started to peel back near the ground. After a couple branches lost all their leaves I knew something was wrong - I looked where the bark had peeled back and it appears like some bugs are digging holes in it now. I'm living in the Sacramento, CA region too in case that matters. (the wood ash around it is something I just put there a couple days ago to stop the squirrels from burying nuts).
Trying to figure out if there's anything I can do to save it.