Studies on weed control in pearlmillet.
Field trials were conducted at Pantnagar in the kharif seasons of 1985-86 to compare the efficacy of manual weeding and 4 herbicides (pre-em. atrazine, methabenzthiazuron and alachlor at 1, 2 and 2 kg/ha, resp., and 0.9 kg dicamba at 20 d after sowing (DAS)) for the control of weeds (mainly Echinochloa colonum, Boerhavia diffusa [B. repens], Eleusine indica, Cyperus rotundus and Eragrostis japonica) in pearl millet [Pennisetum americanum]. The number and DW of weeds at 30 DAS decreased from control values of 512-1212 plants/m2 and 275.6-293.3 g/m2, resp., in unweeded plots to 260-848 plants and 42-224 g, resp., as a result of all herbicides. Manual weeding resulted in 512 weeds/m2 (305.1 g/m2). Crop DM and green fodder yields were increased from 1.49-3.46 t/ha and 6.79-18.11 t, resp., by all treatments except alachlor to 4.38-9.84 t and 20.06-57.67 t, resp. The lowest weed incidence and DW resulted from the use of alachlor.