Economics of Wet Seeded Rice as Influenced by Alternate Wetting and Drying Irrigation Regimes and Weed Management

Abstract

An experiment was conducted at College Farm, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad during rabi 2020-21 and 2021-22.The experiment was laid out in split plot design with two factors i.e., irrigation regimes (I1 : Farmers practice (continuous flooding of 2-5 cm from 3-4 days after sowing), I2: AWDI at 5 cm depletion of ponded water, I3: AWDI at 10 cm depletion of ponded water and I4: AWDI at 15 cm depletion of ponded water) and weed management practices (W1: Control (Unweeded check), W2: Pyrazosulfuron ethyl (10% WP) 20 g ha-1 PE fb Penoxsulam (1.02%) + Cyhalofop butyl (5.1%) 120 g ha-1 PoE, W3:Pyrazosulfuron ethyl (10% WP) 20 g ha-1 PE fb Penoxsulam (1.02%) + Cyhalofop butyl (5.1%) 120 g ha-1 PoE + Mechanical weeding at 45 DAS and W4: Weed free (Mechanical weeding at 15, 35 and 55 DAS with line weeding). Among the irrigation regimes, cost of cultivation and gross returns were highest in farmers practice (continuous flooding of 2-5 cm from 3-4 days after sowing) and lowest in AWDI at 15 cm depletion of ponded water. Net returns and B:C ratio was highest in AWDI at 5 cm depletion of ponded water and lowest net returns and B:C ratio  was recorded in AWDI at 15 cm depletion of ponded water. Among weed management practices highest cost of cultivation, gross returns were achieved in weed free (mechanical weeding at 15, 35 and 55 DAS with line weeding) and lowest cost of cultivation and gross returns was achieved in Control (unweeded control). With respective to herbicide application highest gross returns, net returns and B:C ratio were achieved in pyrazosulfuron ethyl (10% WP) 20 g ha-1 PE fb penoxsulam (1.02%) + cyhalofop butyl (5.1%) 120 g ha-1 PoE + mechanical weeding at 45 DAS.