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A blunt hand tool peels, scrapes away dead material so you can see the tree's response, and the extent of potential issues. Diagnosis requires more than watching, which is a course of INaction. Diagnosis requires cleaning. Lack of knowledge does not require anything!

So it just went away? Thanks for the followup. That orange stuff sure looks like callus turning into woundwood. the cracking bark to the left indicates that it is dead, from the same physical injury. In ALL cases, removing all non-living material from an area of concern is the best way to...

Gummosis is not always bacterial or infectious. This looks like a pine pitching at wound margins. Scrape under the 'grease'--that looks like callus tissue.