The possible cause of red leaf disease and its effect on barlinka table grapes

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dc.contributor.authorSaayman, D.en_ZA
dc.contributor.authorLambrechts, J. J. N.en_ZA
dc.date.accessioned2017-06-12T08:03:48Z
dc.date.available2017-06-12T08:03:48Z
dc.date.issued1993
dc.descriptionCITATION: Saayman, D. & Lambrechts, J. J. N. 1993. The possible cause of red leaf disease and its effect on barlinka table grapes. South African Journal of Enology & Viticulture, 14(2):26-32, doi:10.21548/14-2-2173.en_ZA
dc.descriptionThe original publication is available at http://www.journals.ac.za/index.php/sajeven_ZA
dc.description.abstractThe so-called red leaf (RL) phenomenon of Barlinka table grapes was investigated in the Hex River Valley, De Doorns. The symptoms of RL were found to resemble those of grapevine leafroll (GLR) disease to a certain extent, but also differed markedly from GLR in that initial reddening occurs in veins of apical leaves, with the typical downward curling of affected leaves not a distinctive feature. Like GLR, RL induces uneven and retarded ripening, small and shot berries, without colour in extreme cases, making the grapes worthless for export. Vine vigour is also seriously reduced. The cause of RL was found not to be a Ca deficiency as previously postulated and generally accepted. Foliar and soil applied Ca proved ineffective. Reciprocal grafting of red leaf-affected and heat-treated plant material showed that RL is associated with plant-transmissible pathogens, probably similar or belonging to viruses associated with GLR.en_ZA
dc.description.urihttp://www.journals.ac.za/index.php/sajev/article/view/2173
dc.description.versionPublisher's versionen_ZA
dc.format.extent7 pages : illustrationsen_ZA
dc.identifier.citationSaayman, D. & Lambrechts, J. J. N. 1993. The possible cause of red leaf disease and its effect on barlinka table grapes. South African Journal of Enology & Viticulture, 14(2):26-32, doi:10.21548/14-2-2173en_ZA
dc.identifier.issn2224-7904 (online)
dc.identifier.issn0253-939X (print)
dc.identifier.otherdoi:10.21548/14-2-2173
dc.identifier.urihttp://hdl.handle.net/10019.1/101746
dc.language.isoen_ZAen_ZA
dc.publisherSouth African Society for Enology and Viticultureen_ZA
dc.rights.holderSouth African Society for Enology and Viticultureen_ZA
dc.subjectRed leaf diseaseen_ZA
dc.subjectBarlinka table grapes -- South Africa -- Hex River Valleyen_ZA
dc.subjectGrapes -- Diseases and pests -- Controlen_ZA
dc.subjectRed leaf disease (RL) -- Controlen_ZA
dc.subjectRed leaf disease (RL) -- Causesen_ZA
dc.titleThe possible cause of red leaf disease and its effect on barlinka table grapesen_ZA
dc.typeArticleen_ZA
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