EARLY PERFORMANCE OF ‘FUJI’ AND ‘MCINTOSH’ APPLE TREES ON SEVERAL SEMIDWARF ROOTSTOCKS IN THE 1999 NC-140 ROOTSTOCK TRIAL

‘Fuji’ and ‘McIntosh’ apple trees (Malus × domestica Borkh.) on CG.4184, CG.7707, G.30N (liners from stool beds), M.7 EMLA, M.26 EMLA and Supporter 4 rootstocks were planted at 19 locations (‘Fuji’ at 9 sites and ‘McIntosh’ at 10 sites) throughout North America as a uniform trial coordinated by the NC-140 Technical Committee.
After five growing seasons, the only significant loss was of ‘McIntosh’ trees on CG.7707 (73% survived). The largest‘Fuji’ trees were on CG.7707 and M.7 EMLA, and the smallest were on M.26 EMLA and Supporter 4. The largest ‘McIntosh’ trees were on M.7 EMLA and Supporter 4, and the smallest were on CG.4814 and M.26 EMLA. ‘Fuji’ trees on G.30N, CG.7707 and CG.4814 outyielded trees on M.7 EMLA, M.26 EMLA and Supporter 4. The greatest ‘McIntosh’ yields were from trees on G.30N and the lowest were from trees on M.26 EMLA. The most yield efficient trees of both cultivars were on G.30N and CG.4814, and the least efficient trees were on M.7 EMLA. ‘Fuji’ fruit were largest from trees on G.30N and Supporter 4, and smallest from trees on M.26 EMLA. ‘McIntosh’ fruit were largest from trees on CG.7707 and Supporter 4, and smallest from trees on CG.4814 and M.7 EMLA.

VIII International Symposium on Canopy, Rootstocks and Environmental Physiology in Orchard Systems

W.R. Autio, B.H. Barritt, J.A. Cline, R.M. Crassweller, C.G. Embree, D.C. Ferree, M.E. Garcia, G.M. Greene, E.E. Hoover, R.S. Johnson, K. Kosola, J. Masabni, M.L. Parker, R.L. Perry, G.L. Reighard, T.L. Robinson, S.D. Seeley, M. Warmund

Malus × domestica, yield efficiency, tree size, fruit size, Cornell-Geneva rootstocks, Pillnitz rootstocks

https://doi.org/10.17660/ActaHortic.2007.732.13