I have 2 semi dwarf apple trees and want to know what kind of rootstock are they on. I have a feeling they are most likely M9 but I don't knoe for sure. I bought them from sheridan nurseries whom inturn bought them from mori nurseries. I also want to know where one can find "vineland 1" and/or "geneva 65" rootstocks. I have done some research and concluded they are the better choice of rootstock to avoid fire blight and collar rot.
Howdy Gardenlover, I do not know where you can get hold of G65. V1 has not been released. You may try your luck with University of Guelph and see if she will allow you to test it. UofG has released V3. Propagation rights for it has been given to a nursery in the States. However, DnA Gardens in Elnora, Alberta has sub-contract to produce it. Peace Thean
Most nurseries use: EM IX or 26 rootstock for dwarf apples and EMVIIA, MM106, MM111 for semi dwarf varieties
Bud 9 is a good choice for a dwarf rootstock in terms of tolerance to fire blight and collar rot. Geneva 30 is a good semi dwarf becoming more available in recent years.
Yes, I've actually read quite a lot concerning fireblight and know what this contradiction refers to. Briefly: If the rootstock itself is innoculated with fireblight bacterium, it is not highly resistant. If it has been grafted with a susceptible variety (Gala, Ida Red, or Fortune, for example,) and that is innoculated, the grafted cultivar may become infected, but the rootstock does not. Somehow the graft itself induces a resistance. That is what I recall anyway.
