EFFECTS OF GIBBERELLIC ACID, BIOSTIMULANT CROP SET AND GIRDLING ON THE QUALITY OF BUNCHES OF SEEDLESS GRAPE ‘CATALUNHA’ IN THE SÃO FRANCISCO RIVER VALLEY

This research work has evaluated the effects of gibberellic acid, bio-stimulant Crop Set, and girdling applied during bloom and post-bloom stages on yield and quality of the marketable bunches of seedless grape ‘Catalunha’ in the São Francisco River Valley, Northeast of Brazil.
The trial was carried on throughout two harvest seasons (2001–2002), in the Bebedouro Experimental Field, Embrapa Semi-Árido, Petrolina-PE, Brazil.
The trial was laid out in a randomized complete block design with three replicates, each replicate consisting of a four-tree plot.
The treatments were: one level of gibberellic acid split in five applications (10 + 15 + 15 + 50 + 50 mg.L^-1), two levels of Crop Set (0.1 and 0.2%) and trunk girdling, isolated or combined with the other treatments.
In 2001, the maximum values for weight, length and diameter of berry were observed with girdling + gibberellic acid and girdling + gibberellic acid + Crop Set at 0.1% treatments.
The treatments girdling and Crop Set when applied isolated and/or combined to each other did not increase the berry size.
In 2002, the treatments girdling + gibberellic acid and girdling + gibberellic acid + Crop-Set at 0.2% promoted larger berries, increasing berry length by 32%.

III International Symposium on Tropical and Subtropical Fruits

P.C. de Souza Leão, D.J. Silva, E.E.G. da Silva

grapevine, berry size, gibberellin, citokinin, Vitis vinifera L.

https://doi.org/10.17660/ActaHortic.2010.864.30