Answer: Based on your description I am not able to identify the problem for you. It might be related to poor rooting underground, or there might be a pest or disease problem, or a combination of issues; these types of symptoms are very difficult to diagnose long distance. I would strongly suggest you work with your local county extension and/or a professionally trained and certified arborist to obtain a specific diagnosis and then based on knowing that, decide how to proceed. I am sorry you are having trouble with your tree.
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