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Reduction of bunch stem necrosis of Cabernet Sauvignon by increased tissue nitrogen concentration

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dc.contributor.authorCapps, E. R.en
dc.contributor.authorWolf, T. K.en
dc.contributor.departmentVirginia Agricultural Experiment Stationen
dc.date.accessed2014-07-09en
dc.date.accessioned2014-07-10T13:56:44Zen
dc.date.available2014-07-10T13:56:44Zen
dc.date.issued2000en
dc.description.abstractField experiments were conducted over three years at two vineyards in northern Virginia to examine relationships between specific nutrients and the incidence of bunch stem necrosis (BSN) of Cabernet Sauvignon. Nitrogen, magnesium, acid calcium were applied alone or in combination. Only one of the vineyards (Winchester) showed appreciable BSN incidence during the study period. During the 1996 season at Winchester vineyard, bloom-time leaf petiole and veraison rachis nitrogen concentration of unfertilized (control) vines were 0.80% and 1.16%, respectively. The corresponding control BSN incidence was 41% at harvest time. Seasonally split application of nitrogen fertilizer at 112 kg/ha actual nitrogen increased bloom-time leaf petiole and veraison cluster stem nitrogen concentration to 1.85% and 1.82%, respectively, in the nitrogen plots. The corresponding BSN incidence was reduced to 14% at harvest time. BSN symptoms were not as pronounced during the 1997 season; however, all treatments, including the control plots had elevated tissue nitrogen levels in 1997. Application of nitrogen fertilizer in 1998 was associated with bloom-time leaf petiole and veraison rachis nitrogen concentrations of 1.18% and 1.34%, respectively. Corresponding BSN was reduced to 3% at harvest time, versus 17% to 23% in treatments that did not receive nitrogen. Magnesium and calcium had minimal (1997) or no impact on BSN incidence. Measures of canopy density, cane pruning weights, crop yield, and fruit chemistry suggest that the ameliorating effects of nitrogen on BSN incidence were directly related to increased tissue nitrogen concentration, and not an indirect effect of vigor stimulation or crop ripening rate. A low incidence of BSN at the second vineyard precluded a definitive explanation of prior BSN expression at that location. We conclude that low tissue [N] may be one cause of BSN, and that vineyards should be examined individually for contributing factors.en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCapps, E. R.; Wolf, T. K., "Reduction of bunch stem necrosis of Cabernet Sauvignon by increased tissue nitrogen concentration," Am. J. Enol. Vitic 2000 vol. 51 no. 4 319-328. http://ajevonline.org/content/51/4/319.abstracten
dc.identifier.issn0002-9254en
dc.identifier.urihttp://hdl.handle.net/10919/49449en
dc.identifier.urlhttp://ajevonline.org/content/51/4/319.abstracten
dc.language.isoenen
dc.publisherAmerican Society for Enology and Viticultureen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectbunch stem necrosisen
dc.subjectdessechement de la rafleen
dc.subjectfertilizeren
dc.subjectgrapevineen
dc.subjectNitrogenen
dc.subjectnutrient analysisen
dc.subjectpalo negroen
dc.subjectshankingen
dc.subjectstiellahmeen
dc.subjectwaterberryen
dc.subjectinflorescence necrosisen
dc.subjectgrapevinesen
dc.subjectdensityen
dc.subjectgrowthen
dc.subjectbiotechnology & applied microbiologyen
dc.subjectfood science & technologyen
dc.subjecthorticultureen
dc.titleReduction of bunch stem necrosis of Cabernet Sauvignon by increased tissue nitrogen concentrationen
dc.title.serialAmerican Journal of Enology and Viticultureen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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