Produtividade e qualidade d e frutos de videira Isabel em função das doses de etefon e épocas de poda

Abstract

The vine in tropical region needs special care when compared to temperate regions, especially regarding the handling of the canopy. The objective of this study was to evaluate the productivity and fruit quality, influenced by different pruning times combined with Ethephon doses in two crops of Isabel vine. The design was completely randomized, with sixteen treatments in a factorial 4 x 4, with four replications. The first factor was composed of the pruning times: in the winter season (March 08; March 22; April 05 and April 19, 2013); the summer harvest (August 25; September 08; September 22 and October 06, 2013). The second factor consisted of four Ethephon concentrations (0, 720, 1440, 2160 mg i.a. L-1). In the winter season the pruning time, April 05, 2013 reached the highest yield (1852 kg ha-1) with respect to doses of Ethephon productivity showed a linear growth with increasing doses. Pruning April 05, 2013 also stood out on fruit quality. The summer harvest pruning March 22, 2013 resulted in increased productivity (9046 kg ha-1) and better fruit quality. Doses of Ethephon did not influence the productivity and fruit quality, for this crop.