An experiment was carried out to study the “Influence of GA3 and ZnSO4 alone and in combination on fruit drop, yield and quality attributes of mango (Mangifera indica L.)” in the garden, Department of Fruit Science, C.S. Azad University of Agriculture and Technology, Kanpur-208 002 (U.P.), India, during the year 2022. For this twelve-years-old, uniform in growth 27 plants of mango cv. Dashehari planted at 7 × 7 m apart were taken for experimentation work. There were nine treatments viz., two levels each of GA3 (20 and 40 ppm), ZnSO4 (0.5 and 1.0 %) alone and their combinations along with one control, replicated thrice in RBD were used for the present experimentation work. The recommended dose of fertilizers was applied in all treatments including control. The different doses of plant bio-regulator and mineral nutrient alone and in different combinations were sprayed on the tree at pea stage of fruit setting with a sprayer having a very fine nozzle. The foliar application of micronutrients along with plant bio-regulators plays an important role in manipulating many physiological phenomena, improving the yield and quality and enhanced the productivity of plants by fulfilling the nutritional needs of fruit crops. The utilization of boron helps in the movement of sugar and advances fruit bud formation. The spraying with the combination of GA3 (40 ppm) + ZnSO4 (0.5%) results in minimum fruit drop (83.74%) and maximum number of fruits per panicle (6.48), fruit retention (16.26%), fruit length (13.39 cm), width (9.48 cm), weight (254.35 g), volume (293.22 cc), fruit yield (60.36 kg/plant), specific gravity (1.18 g/cm3), fruit pulp (72.20%), total soluble solids (22.37ºBrix), total sugars (21.70 %), ascorbic acid (37.74 mg/100g pulp) with minimum percentage of titratable acidity (0.53 %), fruit peel (11.31%) and stone (16.49 %) under plains of central Uttar Pradesh.

Mango, GA3, ZnSO4, Fruit drop, Retention, Yield and Physio-chemical quality

From this experiment, it is can safely be concluded that the combination of GA3 (40 ppm) + ZnSO4 (0.5%) results in minimum fruit drop (83.74%) and maximum number of fruits per panicle (6.48), fruit retention (16.26%), fruit length (13.39 cm), width (9.48 cm), weight (254.35 g), volume (293.22 cc), fruit yield (60.36 kg/plant), specific gravity (1.18 g/cm3), fruit pulp (72.20%), total soluble solids (22.37ºBrix), total sugars (21.70 %), ascorbic acid (37.74 mg/100g pulp) with minimum percentage of titratable acidity (0.53 %), fruit peel (11.31%) and stone (16.49 %) under plains of central Uttar Pradesh.

Shubham Kumar, V.K. Tripathi and A.K. Dwivedi (2022). Influence of GA3 and ZnSO4 alone and in Combination on Fruit Drop, Yield and quality Attributes of Mango (Mangifera indica L.). Biological Forum – An International Journal, 14(3): 1501-1505.