Borers? Or something else?

Horticulture
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I noticed these holes on a red pine pre-bonsai in the garden yesterday. Are these from borers? Or something else? Any ideas/solutions appreciated. I have it separated from the rest of my trees for now.

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I swear I saw this on Reddit. Made my skin crawl then just as much as it does now. :nauseated_face: Also, my vote was also borers. The holes plus the swelling of the tissue attempting to heal itself is the indicator for me.

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Check out this thread. Not saying that’s what you have. Your pic just reminded me of this one.

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Normally if you have had a borer infestation there will be cloudy sap coming from those areas.
To me they look like remnants of small branches that have died and fallen off.

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I agree with MtBakerBonsai. On some of the holes there is a small amount of callousing indicating a cut rather than insect attack.

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Thanks for takin a look! Tree is otherwise healthy. I’ll just keep an eye on it for now.

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