EFFECT OF FOLIAR APPLICATION OF DIFFERENT SOURCES OF POTASSIUM AND CALCIUM ON GROWTH AND YIELD OF GRAPE CV. THOMPSON SEEDLESS

Grapes (Vitis vinifera L.), a highly promising fruit crop widely cultivated in tropical and subtropical region of the world.Among different management practices, nutrient management is a key determinant of grape yield, quality and shelf life.The present study "Effect of foliar application of different sources of potassium and calcium on growth and yield of grape cv.Thompson Seedless" was conducted during the year of 2023-24 at Horticulture Research and Extension Centre (HREC), Tidagundi (Vijayapura) under the University of Horticultural Sciences, Bagalkot.The experiment was laid out in randomized block design with 12 treatments and 3 replications.The results depicted the T 7 treatment (0.5 % K 2 SO 4 and 1 % CaCl 2 ) recorded the highest internodal length (5.50 and 5.90 cm), internodal girth (6.92 and 7.33 mm), leaf area (90.10 and 138.50 cm 2 ) and chlorophyll content (32.10 and 36.57SPAD values) at 45 and 90 DAFP respectively.As per the yield and yield attributing parameters are concerned, the T 7 treatment recorded minimum days require for panicle initiation (21.10),days to veraison (84.13) and days taken from pruning to harvest (123.10) and also recorded highest bunch length (23.20 cm), bunch width (9.70 cm), bunch weight (304.89g), bunch volume (268.20 cm3), berry length (16.88 mm), berry diameter (15.28 mm), 100 berry weight (236.24g), bunches per vine (58.75), yield (17.91 kg/vine and 38.51 t/ha) and highest benefit cost ratio (3.16:1).