Articles
INFLUENCE OF SCION AND ROOTSTOCK ON INCIDENCE OF PEACH TREE SHORT LIFE
Article number
592_88
Pages
645 – 648
Language
English
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
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
Publication
Authors
T.G. Beckman, W.R. Okie, A.P. Nyczepir
Keywords
PTSL, disease, screening, Prunus persica
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