Nectarine, split bark and oozing

My 8 year old Snow Queen Nectarine tree has bark splitting which oozes a gummy substance which is amber colored (no smell). This began about 2 years ago on truck and has spread up to top of tree: 7’ and some side branches. The oozing happens all year, even while dormant. The gummy substance is not sticky like sap.
I decided to remove this tree, as you can tell from pictures. The adjacent plum tree is starting to ooze gummy substance now, but no bark splitting. The nectarine tree showed lots of vigor this year with new growth.
I read the “Please advise on Bacterial Canker on Interspecifics” by dwn posted March 7, and UC IPM disease notes on Nectarines. I think the tree has bacterial canker, and would like others opinion(s).

Trunk section

Side branch to trunk section

Trunk stump

Sounds like BC to me. I hope you have new trees started.

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What’s the drainage like in the planting area.

The tree is on raised area to promote drainage. I live in southern CA, which is going into 5th year of drought. This year we only got 7 inches of rain, compared to historical average of around 14 inches.

Was the injury on your tree caused by sun scald/southwest injury?

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That does sound like bacterial canker. If it was spreading to other trees then removal seems like it was the right decision. If the plum tree is showing symptoms then I would recommend excising if it worsens. Where I excised on my tree it’s scarred over nicely. I’ve had 3 hail storms come through which put pockmarks all over my trees and some of them have oozed hard amber, not sure yet if they’re infected. Not sure what else to do except spray copper and plant more resistant varieties. Bad luck seems to abound in the garden some years.

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Did you by chance take pics of the roots of the tree that was removed?

I don’t know enough of reading symptoms of pest, disease, and environment. I figured that if it was localized, then sun scald could be on the list. But the symptoms on this tree successively have moved over much of the tree. Good point though.

I’m keeping an eye on plum, and plan to remove section if it continues, following the thread of your tree.

The roots are still in the ground until next week, and I’ll post those after I remove them.