The purpose of this study was to evaluate the effect of the use of plant growth regulators, gibberellic acid and thidiazuron about the size of the berries BRS Clara in Tropical Region. The experiments were conducted in 2006 and 2007, in the Experimental Station of Tropical Viticulture in Jales, SP, northwestern state of São Paulo. Were tested different concentrations of GA3 applied in isolation, combined with Crop set and thidiazuron, in single or sequential applications (2 and 4 times). The assessments were made during the ripening of the grapes, considering the masses of fresh bunch of rachis and berry, determined by analytical balance, the average length and diameter of the berries, using caliper and the content of soluble solids (TSS), through manual refractometer. The experiments were conducted on experimental design in randomized blocks, represented by a plant, with 15 repetitions in 2006 and 10 repetitions in the year 2007. The data were subjected to analysis of variance and for comparison of the average number of treatments, was used to test Skott Nott at the level of 5% probability. It was observed that the use of plant growth regulators promoted the growth of berries in BRS Clara, with all treatments differing of the control.
vine; size of berries; gibberellic acid; thidiazuron
