The objective of this work was to evaluate the effects of combining crop row spacing with herbicide application times on weed management in soybean, cultivar UFV-16. The experiment was arranged in a randomized block design, with the treatments following a 2 x 8 factorial design, with four replications. The first factor corresponded to crop row spacing (30 and 60 cm) and the second corresponded to types of application (imazamox rates at 30 and 40 g a.i. ha-1, sprayed in very early weed post-emergence (very early) and standard early weed post-emergence (standard), imazamox rates 15 + 15 and 20 + 20 g a.i.ha-1, with sequential application at very early and standard weed emergence times; checks weed free and weeded. For both row spacings evaluated, the predominance of dicot type of weeds was observed. Imazomox application provided a very good to excellent weed control, regardless of the doses, crop row spacing and application times, showing a promising use in weed management for soybean crop, single sprayed rate or in sequence, during very early or standard weed post-emergence times. There was no influence of the treatments on soybean plant height, first pod insertion, weight of 100 seeds and crop yield.
control; very early post-emergence; standard post-emergence
