Water Use Efficiency and Economics of Weed Management Practices Under Drip Irrigated Aerobic Rice Jagadish*, Thimmegowda M. N., Meti. Rohini N., Prakash G. Dept. of Agronomy, UAS, Bengaluru *email: jmgayakwad@gmail.com
Online published on 15 December, 2016. Abstract A field experiment was conducted during summer2014 at ZARS, UAS, GKVK, Bengaluru, for “Studies on weed management approaches for tickle irrigated aerobic rice” on red sandy loam soil. The experiment consisted of ten treatments laid in randomized complete block design with three replications comprising of weed free check, weedy check, hand weeding, hand hoeing and their combinations, pre and post emergent application of herbicides through manual and trickle irrigation. The water use efficiency was maximum in weed free check (164.66 kg ha-cm1) followed byherbigation of pre-emergent pretilachlor + bensulfuran methyl and post emergent bispyribac sodium at 20 DAS (153.45 kg ha-cm−1). It was lower in weedy check (17.07 kg ha-cm−1). Herbigation of pre-emergent pretilachlor + bensulfuran methyl and post emergent bispyribac sodiumat 20 DAS recorded higher net income (Rs. 117704 ha−1) after weed free check (Rs. 126613 ha−1) followed by hand hoeing at 15, 30 and 45 DAS (Rs. 88830 ha−1) and herbigation of pre-emergent application of pretilachlor + bensulfuran methyl (Rs. 90540 ha−1). Weedy check (Rs.-33438 ha−1) should negative net return indicating loss. Top Keywords Aerobic rice, herbigation, water use efficiency and economics. Top |