India possesses a competitive advantage over other nations in mango production due to its favorable natural resources and climactic circumstances. Climate change negatively impacts mango cv. Banganapalli cultivation by altering its ideal growing conditions, increasing pest and disease outbreaks and potentially changing suitable growing areas. Irregular flowering, limited fruit set and inadequate retention resulted in diminished output and inferior fruit quality in mango production. The efficiency and production of mango orchards are influenced by various factors such as biennial bearing, significant fruit drop during the early phases of fruit growth and adverse environmental circumstances that lead to reduced fruit set. The main aim of this study was to examine the effects of Prohexadione calcium on the early floral induction and flowering physiology of the mango cultivar Banganapalli. The chosen trees were treated with different treatments viz., Absolute control (T1), Control (Water spray) (T2), Prohexadione calcium 150 ppm (T3), Prohexadione calcium 200 ppm (T4), Prohexadione calcium 250 ppm (T5), Prohexadione calcium 300 ppm (T6). The trees treated with prohexadione calcium at the concentration of 200 ppm exhibited the maximum levels of chlorophyll index (41.416, 39.700), carbohydrates (18.95mg 100g-1, 26.78 mg 100g-1), nitrogen content (1.35 per cent, 1.75 per cent), C/N Ratio (14.037, 15.305) at flowering and fruit development stage, respectively. Similarly, the number of days taken for first flowering (46.75), the advancement of flowering was (32 days) earlier than the control, total number of flowers per panicle (1003.25), hermaphrodite flowers (200.50) and percentage of fruit set (0.468), were also higher in the same treatment. In a nutshell, applications of Prohexadione calcium at the concentration of 200 ppm had a positive effect on the early floral induction and fruit set of mango cv. Banganapalli.

mango, prohexadione calcium, early flowering, fruit set

In a nutshell, applications of prohexadione calcium at the concentration of 200 ppm had a positive effect on the early flower induction and fruit set of mango cv. Banganapalli. It recorded the maximum level of chlorophyll index, carbohydrate, nitrogen content, C/N Ratio at flowering and fruit development stage respectively. Similarly, the number of days taken for first flowering, total number of flowers per panicle, hermaphrodite flowers and percentage of fruit set, were also higher in the same treatment

Prem M., Deepika V., Prakash K. and Chandrasekaran P. (2025). Regulatory Effect of Prohexadione Calcium on Mango: Enhances Early Floral Induction and Flowering Physiology. Biological Forum, 17(7): 09-13