Four levels of EPTC + R 25788 (0.0; 1.6; 3.2 e 4.8 kg/ha) and diuron (0.0; 0.8; 1.2 and 1.6 kg/ha) with four replications were evaluated in a fatorial field experiment in a Utisol containg 3.5 % organic matter. Better control of nutsedge was obtained with the highest dosage of EPTC + R 25788, mainly in the absence of diuron. However, when the highest eradicane levels were applied as single treatments there was a marked increase in the broadleaf weed population. The best control of broadleaf weed population was achieved when the highest diuron levels were combined with the highest EPTC + R 25788 levels although this condition have not resulted in highest productions. The greatest sweet potato production was obtained with the combination of 6 1/ha of Eradicane plus 1.32 kg/ha of Karmex 800.
herbicide; Ipomoea batatas; nutsedge; Cyperus rotundus