Effects of gibberellic acid on growth, yield and quality of grape cv. Perlet
Shamim-ul-Subtain, S. (National Agricultural Research Centre, Islamabad (Pakistan). Farm Operations and Services) | Khan, A. (National Agricultural Research Centre, Islamabad (Pakistan). Farm Operations and Services) | Khan, M.A. (National Agricultural Research Centre, Islamabad (Pakistan). National Inst. of Organic Agriculture) | Farooq, K. | Chattha, M.R. | Javed, M.A. | Gurmani, Z.A. | Hussain, A. | Iftikhar, M.
Different concentrations of GA3 (15ppm, 20ppm and 25ppm) were applied to grape CV. Perlet as Bloom treatments in 2011, in two splits doses. The first spray was applied at 70-80% bloom (on 4th April) and followed by second spray as the post bloom treatment, just after fruit setting (on 8th May). Three vines were used for each treatment. After the fruits were fully mature, five clusters were randomly harvested from each vine to determine the cluster and berry eight, number of berries per cluster, berry length and width, 100 berry weight, fruit weight and fruit extract content was measured using hand refractometer and determining the percentage content of extract in the juice solution, squeezing the out of 20 representative berries from each plant. Average cluster and berry weight of sprayed vines increased significantly over the non-sprayed vines and the largest cluster weight depicted as fruit yield as per vine (10.7kg) was found in the treatment with highest concentration of GA3 (25ppm). Maximum berry weight, length berry width and TSS were 2.83 g, 1.86 cm, 1.81 g and 19.22%, respectively recorded at 25pp. More over Statistical differences were observed for cluster weight, berry width, length and total soluble salts with GA3 at 15ppm and 20ppm, GA3 at 25ppm may be recommended for spray on the perlet grape cultivar for obtaining higher yield and better quality/fruits.
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