Effect of GA3, NAA and Zinc Sulphateon Fruit Retention, Drop,Yield and quality of Mango (Mangifera indica L.) cv. Dashehari

Author: Afreen Usman Khan, V.K. Tripathi, R.K.S. Gautam and A.K. Dwivedi

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Abstract

An experiment was carriedout in Horticulture Garden, Department of Fruit Science, C. S. Azad University of Agriculture and Technology, Kanpur (U.P.), India, during the year 2022 to study the effect of GA3, NAA and zinc sulphateon fruit retention, drop, yield and quality of mango (Mangifera indica L.) cv. Dashehari and found that the increased level of ZnSO4 had influenced in terms of minimum fruit drop with increased fruit retention and fruit yield as compared to other treatments including control. For this ten treatments viz.; three levels of each GA3 (20, 40 and 60 ppm), NAA (25, 50 and 75 ppm) and ZnSO4 (0.6, 0.8 and 1.0%) along with control, replicated thrice in RBD were used for the experimental work. The recommended dose of fertilizers were applied in all treatments including control. The plant growth regulators and micro-nutrient were sprayed on the tree at the pea stage of fruit on 21/03/2022 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 yield, quality and enhancing the productivity of plants by fulfilling the nutritional needs of fruit crops. From the experiment, it is reported that the treatment of ZnSO4 @1.0 % significantly reduced fruit drop (90.15%) with increased number of fruits per panicle (8.42), highest fruit retention (9.85%), polar and equatorial diameter of fruit(12.68 cm and 8.15 cm), fruit volume (260.17 cc), fruit weight (256.51 g) and fruit yield per tree (54.58 kg), stone percent (17.51 %), pulp content (71.69 %) with minimum peel content (18.23%). The same treatment also produced a favourable effect on fruit quality in terms of increased TSS (19.06°Brix), total sugars (16.06 %), ascorbic acid (38.58 mg/100g pulp) and reduced titratable acidity (0.50%). The specific gravity of fruit (1.01 g/cc) was recorded maximum in fruits which was produced from the plants treated with ZnSO4 at 0.8 %.

Keywords

Mango, Fruit retention, Drop, Yield, Quality, NAA(naphthalene acetic acid),GA3 (gibberellic acid), ZnSO4 (Zinc Sulphate)

Conclusion

The above-mentioned results clearly show that the pre-harvest spray of ZnSO4 @ 1.0 % (T10) had a positive effect on fruit set, fruit drop and fruit retention as well as a higher number of fruit sets per panicle. On the other hand, the used materials increased the yield of Dashehari mango with fruit weight and yield per tree followed by treatment including all sprayed materials. As fruit quality parameters (physical and chemical properties) are concerned, it is clear that spraying of ZnSO4 @ 1.0 % gave a high improve in quality parameters as compared with the control.

References

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How to cite this article

Afreen Usman Khan, V.K. Tripathi, R.K.S. Gautam, and A.K. Dwivedi (2022). Effect of GA3, NAA and Zinc Sulphateon Fruit Retention, Drop,Yield and quality of Mango (Mangifera indica L.) cv. Dashehari. Biological Forum – An International Journal, 14(4): 320-325.