Physicochemical characteristics of clusters vine cv. Sugrathirteen (Midnight Beauty®)

Abstract

With the growing expansion of viticulture, the northeastern region in particular, the Submédio Vale do São Francisco, stands out in the cultivation of grapes. With the introduction of new cultivars in this region, there is a need to improve pruning management for the adaptation of these varieties. The objective of this work was to evaluate the influence of different bud loads on the management of the canopy for the post harvest quality of the fruits of cv. Sugrathirteen (Midnight Beauty®). The research was carried out in two years (2014 and 2015), using the DBC design in a factorial scheme, being two seasons and five treatments (6, 8, 10, 12 and 14 buds) distributed in four blocks, considering 5 plants by repetition. It can be observed that, in relation to the chemical characteristics of the fruit, the time of pruning significantly affected the content of soluble solids and total acidity. There was no influence of the yolk load on the soluble solids content, however, in the two years, they reached levels above 15 0Brix, considered adequate for this cultivar. It was also concluded that the choice of the pruning system as a function of the yolk load and the genetic characteristics of the cultivar, provided higher yields in pruning with 10 buds, without negatively affecting the quality of the grapes.