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To add to Torrey's post, he so clearly states his comments and observations, I continue to await a publication titled Torrey's Tree Care Guide, or The Druid's Guide to Tree Care, or similar. I too observe these damage types as being related to previous ...

Howard... definitely a high risk of failure, i.e., already failing if there are visible cracks. The exudate is likely a combination of sap and a bacterial infection. It is common for bacteria to infect such cracks. As far as cause of the cracks, ...

Good day, Folks, I came upon this phenomenon in a White pine woodlot in Exeter, NH (images below). Trees are single stem, 18 - 22 DBH, 80 - 100' ht. About a third of them exhibit an oozing in the form of a crack at about 7', staining the bark below. ...