ISHS Acta Horticulturae 592: V International Peach Symposium
INFLUENCE OF SCION AND ROOTSTOCK ON INCIDENCE OF PEACH TREE SHORT LIFE |
| Authors: | T.G. Beckman, W.R. Okie, A.P. Nyczepir |
| Keywords: | PTSL, disease, screening, Prunus persica |
| Abstract:
Previous work has suggested that peach scion cultivar exerts a significant influence on incidence of peach tree short life (PTSL) in trees budded onto Nemaguard and Flordaguard seedling peach rootstocks. If this influence is consistent across a range of rootstocks then the influence of scion cultivar might offer a new tool for the management of PTSL. Growers could minimize losses on those sites most prone to PTSL by using the least susceptible scion/rootstock combinations. In this trial trees of ‘Agua 6-4,’ ‘Springcrest,’ ‘Redglobe,’ ‘Redhaven’ and ‘Cresthaven’ budded onto Guardian (BY520-9), Lovell, Nemaguard and Siberian C peach seedling rootstocks were planted on a site with a known history of PTSL. After 6 years, 31 % of test trees had succumbed to PTSL and 18% to other causes. Both scion and rootstock exerted a profound influence on incidence of PTSL (P<0.0001). Mean effects of scion cultivar ranged from 10 to 49% PTSL mortality. Mean effects of rootstock treatment ranged from 10 to 85% PTSL mortality. However, a significant scion x rootstock interaction was also present (P>0.05). This appeared to be largely the result of anomalously low or high PTSL incidence observed in 2 scion/rootstock combinations. These results suggest that some caution should be used in extrapolating the rootstock treatment effects determined in a typical PTSL trial budded with a single scion cultivar to their influence beneath other untested scion cultivars | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
