At the position of the graft, the tree is somewhat weak. It is not s
structural weakness but a growth weakness. Nutrients going up from the
roots and down from the leaves slow at that point. This does not affect
the shoot from the rootstock, which will eventually dominate the plant.
In the end, the grafted top might wither and die.
David E. Ross
Climate: California Mediterranean, see
Exactly... catch those suckers early before they grow larger, and with
a gloved hand yank them laterally, on trunks yank downward. If cut
suckers will grow back in the same spot only larger and often in
multiples. Sometimes a sucker will persist and still grow back, then
excising some of the surrounding wood and cutting deep is necessary,
like removing a cancer, especially occurs at ground level on fruit
trees where the sucker cannot be yanked downward. With persistant
suckers on my plum trees I drill a 1/2" diameter hole 3/4" deep and
fill it with caulking compound.
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