Growths on Crab Apple roots

[Guy]

Quarantine the plant and soil from all others -----not sure, but if only the in-ground section is affected I would air layer a couple of inches up the trunk then discard the cut off lower section (bin or burn)----keep in quarantine for a couple of years until the roots show how effective the treatment.If the pot is important I would clean(preferably over a bin) then perhaps soak in bleach for a period .

is air layering above ground level not a possible solution?

[reddoggy]

Yeah Guy air layering is a possibility but I want to make sure what it is before I make a decision on an air layer probably not a good time of the year either to air layer as crab apples are going to sleep soon.

[teamak]

my first instinct would be that it would take too long and add more stress to any already stressed tree?