If the bark is cut too deep during layering the flow of water and nutrients
up the branch/trunk will be slowed and or stopped. This could cause the
leaves to yellow and die. You might try misting the tree and/or keeping it
in a more protected environment so the leaves are not drawing as much from
the roots. This may slow the growth of new roots, particularly if more
protected means less sunlight, but it may keep the branch alive long enough
for solid pathways to be reestablished.

Marty

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