Articles
Establishment performance of the 2017 NC-140 vigor-limiting peach rootstock trial across ten sites in North America
Article number
1346_84
Pages
669 – 676
Language
English
Abstract
Eight vigor-limiting, standard, and vigorous Prunus rootstocks budded with Cresthaven peach were planted at 10 locations in North America (nine in US and one in Canada) in spring 2017. During the first three years of establishment, significant differences among rootstocks and sites were found for survival, root suckers, tree growth, yield, fruit size, and yield efficiency.
Tree survival was high (>96%) in SC, PA, MI, AL, CO, and UT and low (<75%) in NY, NC, and GA. Rootpac® 40 had the lowest overall survival (72%), followed by Controller 7, Rootpac® 20, and MP-29. Rootstock suckering was excessive on Rootpac® 20 with Lovell a distant second.
The largest trees were in AL, followed by NY, SC, and UT, while the smallest trees were in CO, a short growing season site with calcareous soils and high soil pH. Averaged across all sites, the largest trees were on Guardian®, followed by Lovell, Rootpac® 20 and Controller 6 (76, 72, and 60% of Guardian®, respectively), whereas smallest trees were on Rootpac® 40 and MP-29 (both 41% of Guardian®). In 2019, the first year that trees were cropped, 90% bloom varied across sites by 77 days, whereas 10% maturation differed by 55 days.
However, no differences in bloom or harvest date were observed across rootstocks.
Yield was highest in UT and AL (10-11 kg tree‑1) and lowest in NC, CO, and GA (1-3 kg tree‑1). The highest yields were on the most vigorous rootstocks Guardian®, Lovell, and Rootpac® 20, while lowest yield was on Rootpac® 40. The rootstock with the highest yield efficiency was MP-29 while the lowest was Rootpac® 40. Fruit size was large (227-298 g) in UT, SC, AL, moderate (195-213 g) in NC, PA, CO, and NY, and small (127 g) in GA. Averaged across sites, Controller 6 produced the largest fruits (249 g) while Guardian® and MP-29 produced the smallest (210 g).
Tree survival was high (>96%) in SC, PA, MI, AL, CO, and UT and low (<75%) in NY, NC, and GA. Rootpac® 40 had the lowest overall survival (72%), followed by Controller 7, Rootpac® 20, and MP-29. Rootstock suckering was excessive on Rootpac® 20 with Lovell a distant second.
The largest trees were in AL, followed by NY, SC, and UT, while the smallest trees were in CO, a short growing season site with calcareous soils and high soil pH. Averaged across all sites, the largest trees were on Guardian®, followed by Lovell, Rootpac® 20 and Controller 6 (76, 72, and 60% of Guardian®, respectively), whereas smallest trees were on Rootpac® 40 and MP-29 (both 41% of Guardian®). In 2019, the first year that trees were cropped, 90% bloom varied across sites by 77 days, whereas 10% maturation differed by 55 days.
However, no differences in bloom or harvest date were observed across rootstocks.
Yield was highest in UT and AL (10-11 kg tree‑1) and lowest in NC, CO, and GA (1-3 kg tree‑1). The highest yields were on the most vigorous rootstocks Guardian®, Lovell, and Rootpac® 20, while lowest yield was on Rootpac® 40. The rootstock with the highest yield efficiency was MP-29 while the lowest was Rootpac® 40. Fruit size was large (227-298 g) in UT, SC, AL, moderate (195-213 g) in NC, PA, CO, and NY, and small (127 g) in GA. Averaged across sites, Controller 6 produced the largest fruits (249 g) while Guardian® and MP-29 produced the smallest (210 g).
Publication
Authors
I.S. Minas, G.L. Reighard, B. Black, J.A. Cline, D.J. Chavez, E. Coneva, G.A. Lang, M. Parker, T.L. Robinson, J. Schupp, P. Francescato, J. Lordan, T. Beckman, W.W. Shane, J.R. Pieper, D.G. Sterle, C. Bakker, B. Clark, D. Ouellette, A. Swain, H.E. Winzeler
Keywords
Prunus persica, interspecific hybrid, size controlling rootstocks, yield efficiency
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