Efeitos do CPPU e do ácido giberélico nas características dos cachos da uva de mesa 'Centennial Seedless'

Abstract

Two trials were conducted in a commercial vineyard, in the region of Jundiaí-SP, with the objective of studying the effects of CPPU and GA3 on the clusters and berries characteristics of 'Centennial Seedless' table grape. In the first experiment, it was used CPPU at 0; 5.0; 7.5; 10.0; 12.5; 15.0 and 17.5mg.L-1. In a second trial, GA3 was used at the doses of: 0, 5, 10, 15, 20, 25 e 30mg.L-1. Both, CPPU and GA3 increased the clusters weight and width; the berries weight, length and width; and the pedicel diameter. The increase in cluster length was significant only for GA3 applications. Both growth regulators decreased the total soluble solids content. Applications of CPPU and GA3 at 5mg.L-1, provided increases in berries weight in 59.0 and 78.7%, respectively, and formation of untied clusters, with flexible pedicels. Higher doses led to formation of clusters too much large, excessively compact, with pedicels very thick, and, therefore, with reduced commercial value.