Issue link: https://read.dmtmag.com/i/629538
www.goodfruit.com GOOD FRUIT GROWER FEBRUARY 1, 2016 29 Mark: The Mark rootstock starts growth uniformly and shows excellent horticultural traits in propagation, and grow- ers who have their own nurs- eries have found it to be a very high-performing rootstock, Auvil said. Like other dwarf rootstocks, Mark is not drought tolerant, especially in the arid West, and tends to have more problems when planted as a fi nished tree when compared to bench grafts or sleeping eyes. Budagovsky 9: In recent years, Bud 9 or B.9 has grown in popularity, largely due to its win- ter hardiness and compatibility with most cultivars. It's shown to be more dwarfing than M.9 varieties. B.9 doesn't like sandy soils and has not been a very reliable replant partner, but that can be overcome if more trees are planted, "as close as 18 inches," Auvil said. B.9 is an excellent choice for scions that grow large fruit or have high vigor, but be warned: If you graft them, they will sucker. Geneva 65: A cold-hardy rootstock that is very resistant to fire blight and tolerant of crown and root rot, G.65 remains under review for its susceptibility to latent viruses and replant disorders. Fazio compares G.65 to a Malling 27 as a super- dwarfing rootstock suitable largely for vigorous varieties or a pedestrian orchard, though G.65 has some disease benefi ts over M.27. It's not generally available in volume. Continued next page MARK Very good Excellent Moderate Low Low Moderate None B.9 Very good Very good Moderate None High High None G.65 Fair Fair High TBD High High None M.27 Fair Fair TBD TBD TBD TBD TBD G.41 Fair Very good High High High High High M.9 T-337 Good Good Low Low None High None G.11 Good Good Moderate Moderate High High None G.16 Good Good Moderate Partial Mod-High High None M.9 NIC29 Good Good Low Low None High None M.9 PAJAM2 Good Good Low Low None High None M.9 EMLA Good Good Low Low None High None G.935 Good Very good High High High High None G.969 Excellent Excellent TBD Tolerant High High High G.214 Good Very good High High High High High G.210 Very good Very good TBD High High High High G.222 Very good Very good Low Low High High High G.814 Very good Very good High Tolerant High High None B.10 Good Good High TBD High TBD None M.26 Very good Very good Low None None None None G.30 Fair Fair High High High High None G.890 Very good Very good High High High High High G.202 Very good Very good High Tolerant High High High M.7 EMLA Very good Very good Moderate Moderate Low Moderate None M.106 EMLA Very good Very good Moderate Low Low None None B.118 Very good Very good High Low Moderate Moderate None PROPAGATIBILITY: LINER TREE REPLANT DISEASE FIRE BLIGHT CROWN/ROOT ROTS WOOLLY APPLE APHID RESISTANCE TO: CULTIVAR Listed by size, small to large Rootstock attributes COLD HARDY: PHOTO ILLUSTRATION BY TJ MULLINAX/GOOD FRUIT GROWER SOURCES: TOM AUVIL AND DR. GENNARO FAZIO