ISHS Acta Horticulturae 235: XIV International Symposium on Fruit Tree Virus Diseases
DISTRIBUTION AND PREVALENCE OF PRUNUS NECROTIC RINGSPOT VIRUS IN PEACH ORCHARDS OF SOUTH CAROLINA. |
| Authors: | S.W. Scott, O.W. Barnett, P.M. Burrows |
| Abstract:
A survey to determine the incidence of prunus necrotic ringspot virus (PNRSV) in peach orchards in S. Carolina was conducted in 1987. Samples (5 833) were collected from 114 plantings of trees comprised of seven varieties and located in the 3 peach growing regions of the state. The virus was detected by DAS-ELISA of either floral or juvenile leaf tissues. The incidence of PNRSV in the plantings ranged from 0 – 100 %. After adjustment to allow for orchard age, differences among growers, and differences among regions, incidence of the virus in the varieties was Harvester (7%), Junegold (11%), Redglobe (15%), Loring (39%), Blake (44%), Coronet (53%), and Redhaven (74%). The age of some of the orchards sampled, and the complete infection of these orchards with PNRSV, lead us to infer that they had been established from stock propagated from a source of budwood which had contained the virus. Incidence of the virus was much greater than had been expected and potential yield losses attributable to effects caused by the virus are substantial, particularly in those orchards which had been established with virus-infected stock. | |
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