Foliar and dormant shoot nutrient content and tree survival of ‘Loring’ and ‘Redhaven’ peach [Prunus persica (L.) Batsch] on 8 seedling rootstocks (Lovell, Halford, Harrow W-208, NA8, Nemagard, Siberian C, NC NRL-4, and NC 152-AI-2) were determined during 2 seasons. Foliar Ca levels of both ‘Loring’ and ‘Redhaven’ peach trees were lower on Siberian C rootstock than on any other rootstock in the study. Dormant stem Ca levels were lower when cultivars were on Siberian C rootstock than when on most other rootstocks. Cultivars on Siberian C had lower foliar K levels than most other scion/rootstock combinations. Some differences in foliar and stem N, P, Mg, and Mn levels were evident; however, these differences generally were small and inconsistent. After 6 years in the orchard, greatest tree loss occurred with ‘Loring’ on Siberian C and ‘Redhaven’ on Siberian C or NA-8. Other rootstocks did not affect tree survival of either cultivar. Tree width was smallest with Siberian C rootstock, but few differences in trunk circumference and tree height were observed.
Effects of 8 peach seedling rootstocks on tree growth, survival, and fruit yield of ‘Redhaven’ and ‘Loring’ peach scion cultivars were tested in Alabama, Arkansas, Georgia, North Carolina, and South Carolina. Lovell seedling rootstock was a standard for comparison. Six years of data indicated that Siberian C was not an acceptable rootstock because tree survival and fruit yield were low. Halford was equivalent to Lovell for tree growth, fruit yield, and survival. Fruit size was unaffected by rootstock. Nemaguard and 2 North Carolina selections were resistant to root-knot nematodes (Meloidogyne spp.) but they were not resistant to ring nematodes [Criconemella xenoplax (Raski) Luc and Raski]. Soil fumigation improved tree survival in nematode-infested soil.