A field trial was carried out in a Latosolic B Terra Roxa, to investigate the influence of the herbicides EPTC and Trifluralin on nodulation and dry bean production. Sampling of nodules and plants was made at flowering. Data of bean production were also collected. A system of scores was used to evaluate the control of weeds. Statistical analysis of data showed significant increase in dry weight of nodules due to seed inoculation but there was no correspondent increase in bean production due to seed inoculation. It was observed that herbicides EPTC and Trifluralin had no influence on nodulation. Control of weeds was effective.