Author (s): M.T. Rahman1, M.S.A. Khan2, M. Z. Islam3, A.J. Mridha4and A.K.M.M. Rahman1
Abstract
A field experiment on weed management practices in hybrid maize was conducted at the research field of On Farm Research Division, Alamnagar, Rangpur and Breeder Seed Production Farm, Debigonj in two consecutive kharif seasons of 2007 and 2008. Five weed management methods along with untreated control were used as treatment variables. The treatments were T1 = No weed management (Control), T2 = No weeding + earthing up at 30 days after emergence (DAE), T3 = Spading along with hand weeding at 20 DAE + earthing up at 30 DAE, T4 = Two spading along with hand weeding at 10 and 20 DAE + earthing up at 30 DAE, T5 = Pre-emergence herbicide (Magnum gold) + earthing up at 30 DAE and T6 = Post-emergence herbicide (U-46) at 20 DAE + earthing up at 30 DAE. Better cost effective weed control efficiency (95 to 97%) was observed in T5 treatment i.e. pre-emergence herbicide (Magnum gold) + earthing up at 30 DAE treatment in both the locations. The highest grain yield was obtained from T4 treatments (7.67 to 7.87 t/ha). The yield of T5 (7.47 to 7.48 t/ha) was statistically similar to that of T4. But the cultivation cost of T4 was higher than that of T5 treatment. As a result the highest net return (Tk. 39460 to 39840/ha) and benefit cost ratio (2.12 to 2.14) were recorded in T5; where Pre-emergence herbicide (Magnum gold) was applied along with earthing up at 30 DAE.
J. Expt. Biosci.1(1):1-6, January 2010
Full pdf: PDF
1 Scientific Officer, 2Senior Scientific Officer, Agronomy Division, Bangladesh Agricultural Research Institute, Gazipur-1701, 3Scientific Officer, Breeder Seed Production Farm, Debigonj 4Agronomy Division, BRRI, Gazipur
J. Expt. Biosci.1(1):1-6, January 2010
Full pdf: PDF
1 Scientific Officer, 2Senior Scientific Officer, Agronomy Division, Bangladesh Agricultural Research Institute, Gazipur-1701, 3Scientific Officer, Breeder Seed Production Farm, Debigonj 4Agronomy Division, BRRI, Gazipur
