Super nice and informative Arborist helped me out yesterday.
Yes, the tree is too deep. But not so deep that we can't dig some soil & mulch away to help.
He diagnosed borers. His advice is to enlarge the mulch ring, remove soil & mulch from base of tree and spray the trunk in March or April with an insecticidal product and then again around a month later. He felt we caught it soon enough that we should be able to successfully save the tree.
Good news. It would be interesting to see the trunk flare after the mulch and soil and circling roots are removed. When will that be done?
Was he able to identify the species of borer? Did you find any other signs of bore activity such as boring frass (sawdust), or an entrance hole. How did he identify this other than the gummosis?
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