Answer: The sudden death you describe, when leaves hang onto the branches rather than fall, usually indicates a vascular problem. For some reason the fluids normally transported from the roots through the trunk and branches and into the leaves has stopped. This can happen when there's root or crown rot, which is usually due to overly wet soils, or if the roots have been exposed to herbicides which essentially kills them. I don't know if your tree will survive or if it will recover. Try taking some samples of the problem (or some close up photos of the tree) to your local cooperative extension office for positive diagnosis. There may be something you can do to help your tree recover. Hope so!
Q&A Library Searching Tips