Response of plant growth regulators on growth and green pod yield of summer cowpea (Vigna unguiculata L.)

The present study entitled “Response of plant growth regulators on growth and green pod yield of summer Cowpea (Vigna unguiculata L.)” was carried out during summer season 2024-25 in the research and instructional farm at Bharregaon under Pt. Kishori Lal Shukla College of Horticulture and Research Station, Rajnandgaon (C.G.). The field experiment was conducted in randomized block design with three replications and ten treatments consisting a control with three plant growth regulators viz., Control (T0), NAA @ 20 ppm (T1), NAA @ 30 ppm (T2), NAA @ 40 ppm (T3), Kinetin @ 20 ppm (T4), Kinetin @ 30 ppm (T5), Kinetin @ 40 ppm (T6), Cycocel @ 250 ppm (T7), Cycocel @ 300 ppm (T8), Cycocel @ 350 ppm (T9). The finding of the present investigation clearly indicated that the foliar application of Kinetin 30 ppm gave significantly better performance at vegetative character like maximum plant height (69.32 cm) and NAA @ 20 pmm increased number of branches per plant (6.03). In case of yield parameter like minimum days to first flowering (39.27 cm), minimum days to 50 percent flowering (46.23), no. of green pod per plant (24.21), length of green pod per plant (22.50 cm), no. of cluster per plant (12.21), total weight of green pod per plant (198.24), total weight of green pod per plot (5.55 kg) and total weight of green pod per ha. (146.82 q) found better NAA 30 ppm treated plant. Also increased benefit cost ratio (2.87) found under this treatment. Hence, the treatment T2 (NAA 30 ppm) was found to be most suitable for higher production of cowpea.