Grafting for disease resistance?
Hi. sorry if this has been asked here before (It was too much to go throuhg all of the posts to find out). I have two 30+ year-old pink flowering crabapple trees in my yard that are very prone to cedar-apple rust. They normally drop their leaves around mid-late summer every year unless I spray with copper soap. Is it possible to graft a more resistant cultivar, such as Siberian, Wyman, Prariefire, etc. into the trees and cause it to develop a resistance(I'm talking about a disease resistant scion into disease-prone understock). Thanks in advance.