Apple Rootstock Info: Alnarp 2


Alnarp 2
Introduced by the Alnarp Fruit Tree Station, in Alnarp, in southern Sweden in 1944. Alnarp 2 was selected in 1920 from a group of mixed Doucin (dwarf) trees and it was brought to the US in 1949. This clonal rootstock propagates easily in the stool bed and produces a free-standing semi-vigorous tree 85 to 90% the size of seedling. Alnarp 2 is very cold tolerant and has been used as an understock for interstem

Apple Rootstock Info: P.22

Characteristic Detail Description
Rootstock P.22

Resulted from a cross of M.9 x Common Antonovka and released Research Institute of Poland  in Skierniewice, Poland. This is a very dwarfing rootstock, producing trees similar in size to M.27. Trees have good winter hardiness, and produce few burr knots and rootsuckers. It is moderately susceptible to fire blight and very susceptible to woolly apple aphid, and has good resistance to crown and root rots. P.22 is very precocious, has higher yield efficiency than

Apple Rootstock Info: P.18

Characteristic Detail Description
Rootstock P.18

Resulted from a cross of M.4 x Common Antonovka and released by the Research Institute of Poland  in Skierniewice, Poland. This is a nondwarfing rootstock with vigor similar to seedling. It has not been tested widely in North America, but based on a trial in Illinois P.18 was less precocious and had lower yield efficiency than MM.111. Inoculation tests in California indicate it is moderately resistant to phytophthora. It is susceptible to wooly apple aphid,

Apple Rootstock Info: Seedling

Characteristic Detail Description
Rootstock Seedling

Seedling rootstocks are usually produced from seeds obtained from apple juice plants and are typically ‘Delicious’. Because seedling rootstocks are not clonal, one might expect more tree-to-tree variation than with clonal rootstocks. Trees on seedling rootstocks are considered full sized trees (100% standard) and well pruned mature trees will typically be about 16’ to 18’ tall with a canopy diameter of about 13’ to 16’. Trees on seedling rootstocks generally have good survival, are free-standing,

Apple Rootstock Info: Supporter 4

Characteristic Detail Description
Rootstock Supporter 4

Formerly selected as Pi 80 and resulted from a cross between M.9 and M.4. European reports indicate the vigor is similar to M.26 with good resistance to low temperatures, but susceptible to fire blight and it produced few root suckers. Supporter 4 is being tested in the 2002 NC-140 trial at nine locations with ‘Gala’ as the scion cultivar. After five years tree survival and tree size were similar to M.26 and it produced

Apple Rootstock Info: G.41

Characteristic Detail Description
Rootstock G.41

Resulted from a cross between M.27 and Robusta 5 and introduced by the New York State Agricultural Experiment Station, Geneva, NY. Geneva® 41 and has been tested as CG 3041 and is a full dwarf, similar in size to M.9 NAKBT337. It is highly resistant to fire blight and phytophthora and in initial tests; it appears to be tolerant of replant disease. It is being tested in the 2003 NC-140 trial at 12 locations with

Apple Rootstock Info: V.1

Characteristic Detail Description
Rootstock V.1

The Vineland series of apple rootstocks originated as open-pollinated hybrids of ‘Kerr’ crabapples and M.9 rootstock and were selected at the Horticultural Experiment Station at Vineland, Ontario, Canada in 1958. According to information from the Ontario Ministry of Agriculture, Food and Rural Affairs, V.1 is in the M.26 size class, and yield and yield efficiency are usually greater than M.26. V.1 is cold hardy and somewhat resistant to fireblight. V.1 was included in the 1994

Apple Rootstock Info: G.935

Characteristic Detail Description
Rootstock G.935

G.935 is a 1976 cross of Ottawa 3 and Robusta 5. Size is reported to be slightly larger than M.26, but the rootstock has resistance to fire blight and crown rot. It is not resistant to woolly apple aphid. Production efficiency is rated equal to M.9. In the Golden Delicious trial at Rock Springs in 2006, tree size was about 9 percent larger than M.9 and 12 percent smaller than M.26. Production efficiency was not

Apple Rootstock Info: G.11

Characteristic Detail Description
Rootstock G.11

Resulted from a cross of M.26 and Robusta 5 crabapple and introduced in 1993 by the New York State Agricultural Experiment Station, Geneva, NY. G.11 is one of the more vigorous dwarfing rootstocks and produces a tree similar in size to M.26. It is precocious (similar to M.26), moderately resistant to fire blight, moderately susceptible to woolly apple aphid and crown an root rots, and requires trunk support, especially in the early years. It produces

Apple Rootstock Info: G.214

Characteristic Detail Description
Rootstock G.214 Geneva 214 (G.214) is a cross of Robusta 5 x Ottawa 3 and tested as CG.4214. Trees on this rootstock will need to be supported and produce a tree about 30-35% size of seedling with vigor and precocity similar to M.9 Nic.29 and M.26. Trees are more productive than those rootstocks and have good cold hardiness, and are resistant to fire blight, Phytophthora root rot and wooly apple aphid. Source:
Synonyms Geneva 214