Vol. 9, Special Issue 9, Part D (2025)

A field experiment entitled effect of PGRs Hormone on Chilli. Soil was carried out at the Agricultural Research Farm of Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur. The study aimed to evaluate the comparative effectiveness of different plant growth regulators (PGRs) on the growth, development, and yield of chilli (Capsicum annuum L.) cultivated under alluvial soil conditions. The experiment comprised seven treatments:-NAA 25 ppm, NAA 50 ppm, GA₃ 15 ppm, GA₃ 30 ppm, Ethephon 25 ppm, Ethephon 50 ppm, and an untreated control. The study was conducted using a Randomized Block Design (RBD) comprising seven treatments, each replicated three times GA₃ at 30 ppm proved to be the most effective treatment, showing superior results in all measured parameters compared to the others. It recorded the maximum plant height (77.8 cm), number of fruits per plant (209), fruit length (6.31 cm), and yield (143 q/ha), along with the highest total soluble solids (7.0 °Brix). NAA at 50 ppm was most effective in enhancing fruit quality, particularly capsaicin (0.35%) and vitamin C content (155 mg/100 g). Ethephon treatments showed moderate effects and the control consistently underperformed. post-harvest soil under GA₃ 30 ppm had lower NPK than the control, showing greater crop nutrient use. Economic analysis highlighted GA₃ 30 ppm as the most profitable treatment with the highest net return (₹ 7,91,420/ha) and B:C ratio (12.11). The findings clearly indicate that GA₃ at 30 ppm is the most effective and economically viable treatment for maximizing growth, yield, and soil nutrient use efficiency in chilli grown under fertile alluvial conditions.