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

Grapes (Vitis vinifera L.) a member of the vitaceae family is a highly promising fruit crop grown extensively in tropical and subtropical regions worldwide.The quality of grapes is influenced by various factors such as soil, climate, variety, rootstock, irrigation, maintenance and pruning.Among these, effective nutrient management plays a crucial role in determining grape fruit quality and shelf life.The present study "Effect of foliar application of different sources of potassium and calcium on quality of grape cv.Thompson Seedless" was conducted during 2023-24 at Horticulture Research and Extension Centre (HREC), Vijayapura, Tidagundi.The experiment was designed using a randomized block design with 3 replications and 12 treatments.The results depicted the T 7 treatment (0.5 % K 2 SO 4 and 1 % CaCl 2 ) recorded the highest TSS (21.80 o Brix), TSS to acid ratio (55.90), juice content (75.77 %) fruit firmness (4.92 N), ascorbic acid content (4.92 mg/100g).However, it also recorded lowest titratable acidity (0.39 %) and minimum percentage of physiological loss in weight (6.10, 11.30 and 16.20) at 2 nd , 4 th and 6 th day after storage respectively.