I cut off a 3” branch on a cherimoya.
No sealant applied.
2 weeks later I peeled the bark back.
Cambium on the top 1” was brown.
I abandoned the idea of bark grafting on that branch.
I did many bark grafts on smaller branches.
Only gotten 1 good graft.
I no longer do bark graft on cherimoya.
A picture from a nursery.
Most of the grafts were like that.
The graft has sealant on top, which I never use.
Not sure if that is why I have had high failures.