A 2-year research was conducted to evaluate the effects of bean cultivar, herbicide and planting date on a plot scale in Zanjan Province, Iran. Weeds across plots were identified as 26 species. Weed density often lower for fourth (25–30 June) than first (10–15 May) Imazethapyr, Trifluralin, hand-weeding control at seedling, flowering maturity stages growth. At seedling flowering, there greater ...