The aonla is an important high value indigenous fruit crop an experiment on impact of foliar application of naphthaleneacetic acid (NAA), boron (B) and gibberllic acid (GA3)on fruit drop, yield and quality attributes of aonla (Emblica officinalis Gaertn. cv. NA-7) was conducted at the Horticulture Garden, Chandra Sekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh, India, during 2024. Employing a randomized block design (RBD), with the one-way analysis of variance (ANOVA) the research involved 10 different treatments and 3 replications. Result revealed that the minimum fruit drop (63.47 %) and highest fruit retention (36.53 %) was observed in plants treated with T6 (NAA at 30 ppm). Treatment T8 (GA3 at 50ppm) resulted in a maximum (4.38 cm) length, width of (4.96 cm), highest fruit weight (37.67 g), maximum fruit volume (35.21 cc), highest pulp weight (36.34 g), minimum stone weight (1.32 g), highest pulp: stone ratio (27.43), highest specific gravity (1.07 g/cc) and maximum fruit yield (96.92 kg/plant). The highest total soluble solids (15.16 °Brix), lowest titratable acidity (1.63 %), maximum ascorbic acid (607.67 mg/100g), highest total sugar (12.97 %) and highest moisture (94.11 %) with the foliar application of T8 (GA₃ at 50 ppm). Thus, the information generated will help to develop the scientific package of practices for aonla cultivation, which in turn will help to improve the economy of farmers.
T. Siddhant, V. K. Tripathi, P. Shiwanand· Plant Science Today· 0 citations
Phalsa (Grewia asiatica L.) is an important minor fruit crop valued for its refreshing fruits, but its productivity and fruit quality are often constrained by limited systematic management of plant growth regulators. To evaluate the effects of foliar sprays of Naphthalene Acetic Acid (NAA) and Gibberellic Acid on the growth, flowering, yield and quality of phalsa (Grewia asiatica L.), a field experiment was conducted at the Garden, Department of Fruit Science, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur (U.P.), during 2025-26. Ten treatments comprising NAA at 50, 75 and 100 ppm, GA₃ at 100, 150 and 200 ppm, three NAA + GA₃ combinations (50+100, 75+150 and 100+200 ppm), and one control (water spray) were evaluated in a randomised block design with three replications. Sprays were applied to uniformly maintained, regularly pruned sixty-five-year-old bushes that received the recommended dose of plant nutrients throughout the investigation period. Among all treatments, T₇ (50 ppm NAA + 100 ppm GA₃) was consistently the most effective, recording the maximum bush height (177.46 cm), number of shoots per bush (134.0), number of leaves per shoot (24.70), number of flowers per shoot (160.70), fruit yield per plant (3.05 kg), fruit diameter (1.14 cm), hundred-fruit weight (83.25 g), pulp weight (72.80 g) and pulp:stone ratio (6.97), together with the minimum number of days to flowering (35.37 days) and the lowest stone weight (10.45 g). T₇ also produced fruit of superior biochemical quality, with the highest total soluble solids (25.10 °Brix), reducing sugars (9.10%), non-reducing sugars (2.17%) and total sugars (11.27%), along with the lowest titratable acidity (2.51%). The results indicate that a combined foliar spray of 50 ppm NAA and 100 ppm GA₃, applied once before flower-bud initiation, can be recommended for improving growth, earliness of flowering, yield and fruit quality of phalsa cv. Sharbati under the agro-climatic conditions of the Indo-Gangetic plains of Uttar Pradesh.
R. Sonkar, V. K. Tripathi, S. Verma et al.· Asian Journal of Soil Scienc...· 0 citations
A field experiment was conducted during 2025-26 at the Nursery Farm, Department of Fruit Science, C.S. Azad University of Agriculture and Technology, Kanpur (U.P.), to evaluate the response of aonla (Emblica officinalis L.) cv. NA-7 to foliar sprays of gibberellic acid (GA3) and naphthalene acetic acid (NAA), applied singly and in combination. Nine treatments comprising GA3 at 25 and 50 ppm, NAA at 25 and 50 ppm, their four combinations, and a water-sprayed control were evaluated in a Randomised Block Design with three replications; sprays were applied at flowering and post-fruit-set stages. All recorded parameters responded significantly to the treatments. The combined spray of GA3 50 ppm + NAA 50 ppm (T8) consistently produced the best response among the treatments: fruit drop decreased to 19.10% compared with 62.10% in the control, fruit retention increased to 80.90%, and yield reached 216.00 kg per plant, representing a 32.52% increase over the untreated trees. The same treatment produced the longest, widest, and heaviest fruits, the highest pulp weight, and the most favourable pulp-to-stone ratio (21.09, approximately 1.78 times that of the control). In terms of quality, it increased total soluble solids to 12.20°Brix, reduced titratable acidity to 1.72%, increased the TSS:acid ratio to 7.09, and increased ascorbic acid content to 608.32 mg per 100 g pulp. These results suggest a synergistic response to the combined application of GA3 and NAA rather than a simple additive effect and support the use of GA3 50 ppm + NAA 50 ppm to reduce pre-harvest fruit drop and improve yield and fruit quality in aonla cv. NA-7 under the agro-climatic conditions of the Central Plain Zone of Uttar Pradesh.
Amit Singh Yadav, V. K. Tripathi· Plant cell biotechnology and...· 0 citations
An experiment was carried out in the Horticulture Garden of C. S. Azad University of Agriculture and Technology, Kanpur (U.P.) during 2023, using nine treatments viz., GA3 at 20 and 50ppm, NAA at 15 and 30ppm along with their combinations including a control (water spray) on twenty-six years old plant of aonla cv. NA-7 replicated thrice in Randomized Block Design. From the experiment, it is reported that higher concentration of GA3 @ 50 ppm + NAA @ 30 ppm significantly reduced fruit drop (18.84%) and increased fruit retention (81.16%). It also gave maximum fruit yield (211kg/plant), increased fruit length (3.74cm), fruit width (4.97cm), fruit weight (30.02g), fruit volume (27.79cc), specific gravity (1.08g/cc), pulp weight (28.68g) and maximum pulp: stone ratio (21.41). Plants treated with GA3 @ 50ppm + NAA @ 30ppm also resulted in an increase in ascorbic acid (605.49mg/100g), TSS (12.150Brix) and total sugar (9.81%) content. GA3 @ 50ppm + NAA @ 30ppm significantly reduces the stone weight (1.34g) and acidity (1.72 %) under the plains of northern India.
Ayushi Shrivas, V. K. Tripathi, Akhilesh Mishra· Progressive Agriculture· 0 citations
An experiment was conducted during 2025 at the Department of Fruit Science, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur (U.P.), to assess in the enhancement of yield and quality attributes of litchi through the foliar application of NAA, Boron, and Zinc Sulphate. Nine treatments comprising two concentrations of NAA (40 and 60 ppm), three concentrations of boron (0.4, 0.6, and 0.8%), three concentrations of ZnSO4 (0.6, 0.8, and 1.0%), and one control were evaluated in a Randomised Block Design with three replications. Foliar sprays were done twice, once before flowering and again at the pea stage of fruit development. Significant differences were observed among treatments. NAA @ 40 ppm recorded highest fruit set (57.46%), lowest fruit drop (61.28%), and highest fruit retention (33.82%). However, Boron @ 0.6% proved superior in improving fruit quality and yield by recording minimum fruit cracking (7.95%), maximum fruit length (4.62 cm), fruit diameter (3.90 cm), fruit weight (20.00 g), pulp weight (16.42 g), TSS (22.55 °Brix), total sugars (18.52%), vitamin C (25.36 mg/100 g), pulp: stone ratio (5.97) and fruit yield (25.31 kg plant-1), with minimum seed weight (2.75 g) and titratable acidity (0.35%). Therefore, a foliar application of boron at 0.6% is recommended to improve yield and quality of litchi cv. Dehradun under the plains of northern India.
Shivani, V. K. Tripathi, Akhilesh Mishra· Progressive Agriculture· 0 citations
A field experiment was conducted at the Garden, Department of Fruit Science, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh, India, from March to December 2025 to study the effect of organic nutrient sources on the yield and biochemical quality of the dragon fruit cultivar Pink-fleshed. The experiment comprised nine treatment combinations of Vermicompost, Azotobacter, and phosphate-solubilising bacteria (PSB) applied at varying doses, along with an untreated control. Among the treatments, the combination of Vermicompost at 1.00 kg/plant with Azotobacter at 100 g/plant and phosphate-solubilising bacteria (PSB) at 100 g/plant recorded the best performance in yield (2.86 kg/pillar) and quality attributes. This treatment produced the highest fruit weight (219.90 g), fruit length (10.29 cm), fruit diameter (8.14 cm), fruit volume (183.16 cc), specific gravity (1.20 g/cc), and pulp weight (187.05 g), along with the most favourable pulp-to-peel ratio (5.71) and the lowest peel weight (32.85 g). With respect to biochemical parameters, the same treatment recorded the highest total soluble solids (13.68 °Brix), reducing sugar (7.02%), non-reducing sugar (5.20%), total sugar (12.22%), and ascorbic acid content (11.11 mg/100 g pulp), together with the lowest titratable acidity (0.56%). The findings suggest that the integrated use of Vermicompost with nitrogen-fixing and phosphate-solubilising biofertilisers can substantially improve dragon fruit yield and quality in organic cultivation, offering a sustainable alternative to chemical fertilisation.
D. Dixit, V. K. Tripathi, R. Tripathi et al.· Journal of Advances in Biolo...· 0 citations
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