Vol. 9, Issue 7, Part Q (2025)

The present field experiment was carried out at the horticulture research farm of Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj during the year 2024-25 to study the performance of different treatments combination. The experiment comprised of 16 (15+1) treatments with 3 replications in randomized block design. The present study was conducted to evaluate the influence of exogenous applications of plant growth regulators and boron on the physiological, reproductive, yield, biochemical, and economic traits of guava (Psidium guajava L.) cv. Allahabad Surkha. Among the treatments, T₁₄ consistently recorded the highest values across key parameters including chlorophyll content (44.33 SPAD), number of flowers (150.67), fruit set (79.87%), fruit dimensions (5.76 cm polar and 6.91 cm radial diameter), fruit weight (142.63 g), number of fruits per plant (116.67), fruit yield per tree (16.65 kg), yield per hectare (554.93 q/ha), pulp weight (128.58 g), seed number (494), seed weight (14.05 g), and 100 seed weight (1.13 g). Biochemical quality was also superior in T₁₄, with maximum TSS (10.23 °Brix), lowest acidity (1.03%), highest pH (4.20), and ascorbic acid content (240 mg/100 g). Economically, T₁₄ achieved the highest net return (Rs. 11,64,540) and benefit-cost ratio (2.50), confirming its superiority. T₁₃ and T₁₅ closely followed T₁₄ in most parameters, indicating their substantial effectiveness. In contrast, the untreated control (T₀) consistently recorded the lowest values across all traits, reaffirming the positive impact of treatment applications. Overall, treatments T₁₄, T₁₃, and T₁₅ emerged as the most efficient combinations for enhancing the growth, yield, fruit quality, and profitability of guava cultivation under the given agro-climatic conditions.