Influence of Pre-harvest Application of NAA, Ca, and B on Fruit Drop, and Yield of Thailand Ber (Ziziphus mauritiana)

The present study was carried out to investigate the beneficial effects of the pre-harvest spray of NAA, calcium, and boron on fruit drop and yield of Thailand ber (Ziziphus mauritiana) at the Experimental Farm, Department of Horticulture, AAU, Jorhat-13 during 2022-2023. The treatment T4 i.e. spraying with NAA @ 20 ppm + B @ 0.5% resulted in maximum fruit set (4.68%), lesser fruit drop (53.28%), the highest yield per tree (18.12 kg/tree), yield per hectare (24.16 t), the maximum thickness of pulp (1.94 mm) and pulp weight (62.25 g). Spraying of NAA 20 ppm in combination with Boron 5% is the most profitable approach for minimizing fruit drop and maximizing production.