Importance of Scion Cultivar in Peach Tree Short Life
DOI:
https://doi.org/10.71318/apom.2009.63.2.58Abstract
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 syringaepv. syringaevan 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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