An experiment with Arroyo Loro bean was conducted at Isabela, Puerto Rico in 1998 to evaluate potential weed management strategies for dry beans. Trifluralin (0.75 kg/ha) and pendimethalin (I .24 kg/ha) both preplanting, and imazelhapyr (0.06 kg/ha) and metholachlor (2.8 kg/ha) both preemergenee, were equally effective reducing broadleaf weeds. Prccrncrgcnce imazethapyr and postemergence bentazon were less effective for grasses than rnctolachlor, trifluralin, pcndimethalim, and bentazon which in combination with sethoxydim at third week controlled 100% of grasses. Bean yield ranged from 1,555 kg/ha (with pendimethalin plus bentazon) to 1,970 kg/ha (with imazethapyr at 5 days) but did not differ significantly (P = 0.05). Harvesting by hand maximized yield recovery since most ofthe herbicides reduced weed biomass and potential grain loss.