Name: Al F. 5b-6a mid-MI Knowledge counters trepidation.
..... hard to say from an image - killing (high) root temps, over or under-watering would be high on the list. If you notice any cankers, cracks, or bacterial ooze coming from the tree, perhaps fire blight.
Al
* Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for. ~ Socrates
* Change might not always bring growth, but there is no growth without change.
* Mother Nature always sides with the hidden flaw.