RT Journal Article SR Electronic T1 Studies with Gibberellin on Wine Grapes to Decrease Bunch Rot JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 78 OP 82 DO 10.5344/ajev.1962.13.2.78 VO 13 IS 2 A1 Weaver, Robert J. A1 Kasimatis, A. N. A1 Mccune, Stanley B. YR 1962 UL http://www.ajevonline.org/content/13/2/78.abstract AB Zinfandel, Tinta Madeira, and Carignane vines were sprayed with gibberellin at prebloom or bloom stage. Clusters were loosened and prevalenoe of rot sharply reduced by the sprays. Optimum concentrations of gibberellin caused little or no reduction in yield of fruit. The use of spray in two successive years produced no adverse effects.