Weed management practices in summer rice and their residual effect on black gram Dash Subhaprada*, Malik GC, Banerjee M, Sethi D1 Department of ASEPAN, Palli Siksha Bhavana (Institute of Agriculture) Visva-Bharati, Sriniketan-731236, West Bengal, India 1Department of Soil science and Agricultural chemistry, Orissa University of Agriculture and Technology, Bhubaneswar-751003, Odisha, India *Email for correspondence: subhapradadash34@gmail.com
Online published on 25 July, 2018. Abstract Summer rice cultivation mainly depends on the assured irrigation and modern inputs. Among the modern inputs, weed management aspect plays a vital role. With the view of weed management a field experiment was conducted during summer season of 2014 at the agricultural farm of Palli Siksha Bhavana (Institute of Agriculture) at Visva-Bharati, Sriniketan which lies in the sub-humid subtropical lateritic belt of West Bengal to study the effect of different weed management practices on weed control efficiency, productivity and economics of rice and residual effect of herbicides on black gram. The results showed that the application of bispyribac sodium @ 25 g/ha at 20 DAT (T1), bispyribac sodium @ 50 g/ha at 20 DAT (T2) and butachlor @ 1 kg/ha at 3 DAT + hand weeding at 20 DAT (T6) were essential for higher productivity of summer rice. These treatments and cono weeding twice at 20 and 40 DAT (T7) efficiently controlled the weeds. Bispyribac sodium @ 25 g/ha provided higher net returns with higher return per rupee invested. The results indicated the need of different weed management practices to reduce the influence of weeds in summer rice cultivation. The study recommends the use of bispyribac sodium @ 25 g/ha at 20 DAT for higher productivity and greater profit of summer rice. There was no harmful effect of the weed management practices on the performance of the residual crop of black gram. Top Keywords Black gram, rice, summer rice, weed management. Top |