Effect of Micro-nutrients and Plant Growth Regulator on Management of Fruit Drop in Bael (Aegle marmelos Correa) cv. Narendra Bael-9 under Ayodhya Region

The present investigation was carried out on twenty year old bael plant in 2023-2024 at Main Experiment Station, Department of Fruit Science, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya (U.P.), India. There were eight treatments along with one control (T1- Control, T2- Boric acid @1.0%, T3- CuSO4 @0.8%, T4- NAA @20 ppm, T5- Boric acid @1.0% + CuSO4 @0.8%, T6- Boric acid @1.0% + NAA @20 ppm, T7- CuSO4 @0.8% + NAA @20 ppm, T8- Boric acid @1.0% + CuSO4 @0.8% + NAA @20 ppm) and replicated thrice in Randomized Block Design. Single plant was used as a Unit. Micronutrients and PGR are applied two time (first spray at fruit set in July and second spray after two months of the first spray in September). From the present investigation it is found that the foliar application of Boric acid @1.0% + NAA @20 ppm proved to the most effective treatment for reduced in fruit drop (28.89 %), increase in fruit set (54.17 %), increase fruit retention (71.11%) and as well as also increase yield (85.33 kg/plant and 145.31 q/ha) influenced by the combined spray of Boric acid @1.0% + NAA @20 ppm in bael cv Narendra Bael-9.