Post-emergence herbicides for weed management in French bean

Experiment was conducted to investigate the effects of imazthapyr and quizalofop-ethyl in different doses (50, 75 and 100 g/ha) with two interval (20–25 and 30–35 DAS), hand weeding twice (20 and 40 DAS) in comparison to unweeded control on yield and yield components of French bean during Rabi season of 2009 to 2011 under irrigated condition on Inceptisols. Among herbicides, application of imazethapyr at 100 g/ha at 20 DAS produced lowest weed index and highest weed efficiency and seed yield (1.24 t/ha). Imazethapyr at 100 g/ha at 20–25 DAS gave more economic profit (?28869/ha) followed by imazethapyr at 100 g/ha at 30–35 DAS (?27780/ha). None of the herbicides showed phytotoxicity to crop and was compatible with French bean. Imazethapyr and quizalofop-ethyl at lower concentration did not provide satisfactory weed control in rajmash field.