Influence of Different Levels of NAA and 2, 4, 5-T on Fruit Drop, Fruiting, Fruit Retention, Growth and Yield of Indian Ber (Zizyphus mauritiana Lamk.)

The experiment was carried out at Horticulture Garden, Department of Fruit Science, Chandra Shekhar Azad University Agriculture & Technology, Kanpur (U.P.) during the November 2020- March 2021 and 2021- 2022. Sixteen treatments viz. four levels NAA (0, 20, 30 40 ppm) 2,4,5-T 10, 20 30ppm) were studies in a Factorial Completely Randomized Design with three replications. Spraying done on eleventh November, 2020 first year fifteenth second fruit setting stage (Pea Stage) fine nozzle sprayer each treatment to give uniform spray all over ber plant. Application (NAA@40 ppm 2,4,5-T@30 significantly maximized initial set (162.00 163.66), maximum retention (20.39 20.43 percent) percentage (79.60 79.56 per cent). length width (5.35 4.99 cm) (4.24 4.27 respectively increased by application same concentration mention above. (36.62 36.82 g) weight physical properties fruits like volume (36.57 36.42 cc) recorded under (NAA@40ppm 2,4,5-T@30ppm). minimum stone (0.88 0.87 cm), diameter (0.65 0.66 gm) specific gravity (0.94 0.94 g cc-1) found ppm). yield (39.53 40.49) kg plant, hectare (121.30 121.33quintal) combination 2,4,5-T@30ppm) both years experiment.