Answer: Unfortunately, based on your description I am unable to identify the problem. I would strongly suggest you consult with your local county extension to obtain a specific diagnosis of what this is, and based on knowing that, their recommendations of how to control it. If a chemical control is needed they will have the most up to date information on what to use and how/when to apply it for the best results. They may appreciate photos of the overall tree and close-ups, possibly also a sample enclosed in a clear plastic bag. I am sorry about your tree.
Q&A Library Searching Tips