Effect of plant growth regulators on growth and yield of round gourd

The present investigation entitled “Effect of plant growth regulators on growth and yield of round gourd” was carried out during the summer season of 2024-2025 at the Experimental Unit, Betelvine Research Station, Ramtek, Nagpur. The primary objective was to study the effect of plant growth regulators on growth and yield of round gourd. Significant differences were recorded among treatments for key growth attributes, including length of main vine, number of sub vines, number of leaves vine-1, length of internode and leaf area at 30, 45, and 60 days after sowing (DAS). Application of GA₃ at 90 ppm resulted in the highest main vine length (176.7 cm), number of leaves vine-1 (69.9), internodal length (11.87 cm) and leaf area (92.90 cm²) at 60 DAS. In contrast, Ethrel at 150 ppm produced the maximum number of sub vines (7.2). With respect to yield, Ethrel at 150 ppm recorded the maximum fruits vine-1 (13.50), fruit weight (60.30 g), fruit yield vine-1 (0.813 kg), fruit yield plot-1 (12.45 kg) and fruit yield hectare-1 (103.75 q), whereas Ethrel at 200 ppm promoted the days to first fruit harvest (39.57 days). Overall, Ethrel at 150 ppm proved most effective for enhancing yield attributes, while GA₃ at 90 ppm significantly improved vegetative growth parameters.