Satsuma plum leaf damage

Hello. I notice the satsuma leaves on my 8 in 1 plum tree has leaves as shown in the attachment…anyone have any idea what causes this? The other varieties on the tree do not exhibit this symptom.

The splotchiness and the way the outer leaves are worse than the inner ones makes me think it was burn from either the sun or from something you sprayed on it… more likely the latter I would guess.

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@scottfsmith i guess burn , given i didn’t spray anything on it and it’s only the satsuma leaves with this problem. The other varieties on the same tree look fine. Not sure if it makes any difference but this is 2 yr old satsuma on m2624 but i grafted 8 other varieties to most of the satsuma branches.