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

An experiment was conducted during the summer season of 2024-25 to study the response of different growth regulators on bottle gourd cv. Arka bahar with three growth regulators at different concentrations: Ethrel (100, 200, and 300 ppm), GA₃ (25, 50, and 75 ppm), CCC (100, 200, and 300 ppm). Water was used as a control. The growth regulator was sprayed at the 2-4 leaf stage. All treatments were replicated three times in a randomized block design, keeping the plot size 5.7m x 2.5m. Foliage application of T₃ GA₃ (75 ppm) was found beneficial for vine length (7.75 m), node at first male flower (8.3), no. of male flower/plant (67.1), days to first appear male flower (40.8) whereas T₅ Ethrel 200 ppm was found most effective in terms of node at first female flower (11.7), no. of female flower/plant (15.5), days to first appear female flower (45.2), sex ratio (2.60), average fruit length (43.2 cm), average fruit diameter (8.6 cm), average fruit weight (856.3 g), Number of fruit per plant (13.11), fruit yield per plant (11.2 kg), fruit yield per plot (67.33), fruit yield per hectare (47.25). Overall results revealed that the application of ethrel at 200 ppm proved to be more beneficial for various growth and yield traits in bottle gourd.