Aiming to increase the berry size, weight of bunches and yield, the bunches of the cv. Superior Seedless was powdered with gibberelic acid (1 + 20 mg.L-1), bio-stimulant Crop Set® in the dosis of 0.1 and 0.2%. In adition was used the treatment known as girdling. Those treatments were applied in an isolated way or combined to each other. The work was carried out during 2001-2002 (two harvest seasons), in the Experimental Station of Bebedouro, Semi-arid Embrapa in Petrolina, Pernambuco State. The experimental design were in randomized blocks with 12 treatments and three replications. The differences among the treatments were not statistical significant in the two evaluated seasons. However, when the gibberelic acid was associated with Crop Set® 0.1% and girdling, it was observed a tendency to increase the weight of bunches, as well as, the weight and berry size in the 2001 season. The bunches treated with gibberelic acid presented stronger rachis, although significant differences are not observed among the treatments. Some plants submited to the girdling presented problems with cicatrization, that caused death of them, recomending to avoid this practice in the conditions of this work.
seedless grapes; bio-stimulant; gibberelic acid; Crop Set®
