MD. NASIR1, MD. MAHBUB HASSAN2, H. M. MONIRUZZMAN3, MD. TAHMIDUR RAHMAN4 and G. M. M. BARI5
1Project coordinator, USAID Agricultural Inputs Project (AIP) Bangladesh, 2Senior Officer Sonali Bank Limited, Fashitola Branch, Gaibandha, 3Department of Agricultural Extension, Khamarbari, Farmgate, Dhaka, 4Assistant Professor, Faculty of Agriculture, First Capital University of Bangladesh, Chuadanga and 5Scientific Officer, Bangladesh Agricultural Research Institute (BARI), Rajshahi, Bangladesh.
*Corresponding author’s Email: tahmidur80@gmail.com
ABSTRACT
The study was conducted at the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh during 2013-2014 to determine the effect of selected herbicides on weed suppression, growth and yield of rice under wet land condition. A rice variety BRRI Dhan29 was subjected to treatments with six herbicides, one hand weeding and two hands weeding with weed free plot and a weedy check (control). The highest weed density (123.7 m-2) was found in the un-weeded treatment (T10) at harvest. Among the herbicidal treatments MCPA 500 (MCPA) (T5) was found to contribute highest weed density (48 m-2) and the lowest weed density (33.66 m-2) was found in Manage 10WP (Pyrazosulfuran-ethyl) treatment (T4). The weed control efficiency was the highest (70.71%) in T4 and minimum was obtained from the treatments T6 (46.12%). In case of herbicides, Manage 10WP (T4) produced highest yield (5.23 ton ha-1) but Ronstar 25EC (Oxadiazon) (T1) and Fastmix EW (Butachlor) (T2) produced lower grain yield among the chemical treatments. The highest straw yield was found in Manage 10WP (6.21 t ha-1) the lowest was in Hammer 24EC (Carfentrazon ethyl) (T6) treatment (2.72 t ha-1).
Keywords: Un-weeded treatment, Highest weed density and Weed control efficiency.