Volume 63 Number 2 Article 4
Year 2009 Month 4
Title: Importance of Scion Cultivar in Peach Tree Short Life
Authors: W.R. Okie, G.L. Reighard and A.P. Nyczepir
Abstract:
In the southeastern United States peach [Prunus persica (L.) Batsch] trees planted on sites previously planted
with peaches often suffer from Peach Tree Short Life (PTSL) syndrome, in which ring nematode [Mesocriconema
xenoplax (Raski) Loof & de Grisse], cold injury, and bacterial canker (Pseudomonas syringae pv. syringae van
Hall) combine to kill the scion in the spring.
Rootstock plays an important role; where PTSL is present, trees on
Guardian® ‘BY520-9’ rootstock survive better than those on Lovell and much better than those on Nemaguard.
Little is known about the role of scion cultivar in susceptibility to PTSL. Previous studies looking at the role of
cultivar showed ambiguous results.
This study, done in both South Carolina and Georgia, suggests that environmental
variability associated with the plantings makes it difficult to reliably separate most commercial cultivars into
susceptibility classes.
Cultivar susceptibility in the previous experiments were not well correlated with the results
of this test, nor with each other.
More replications are needed for reliable screening of commercial scion cultivars.
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