Hoe and weed three times and support the vines to reach a pandal 2 m high. The source also lists Ethrel 250 ppm (2.5 ml per 10 litres) sprayed four times weekly from the 15th day after sowing to increase yield.
Follow the instructions on the product label. Consult your local Agriculture Officer before use.
Pending expert review
Source
Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Ribbed gourd – After cultivation, p. 87