Improvement of bunch quality and yield of roumi red grapevines by some growth regulators

The present investigation aimed mainly to control heavy flower and fruit shedding from Roumi Red bunches using three Sitofex concentrations (1 , 3 and 5 ppm) applied at full bloom or at fruit set. Those treatments were compared with the pre-bloom Cultar treatment at 250 ppm which is commercially practiced in Roumi Red vineyards. Untreated bunches were used as control