Originally Posted by Think Green
Good call Gardens...........From the pic of drought stressed grass in the background, it would seem evident of Verticillium Wilt or Bacterial issues. A twig graft slice would tell all.
I can't really say for sure without doing a thorough inspection of the tree. Just looks like the symptoms of Vert Wilt.
If it were me I'd call the local extension office. At least around here Verticillium wilt isn't rampant, so when it shows up the extension office likes to know about it.
One reason I believe it's a disease or infection is that the tree isn't showing an over-all tree decline. It's sporadic in the pics.