The objective of this research was the evaluation of the selectivity of the herbicides oxyfluorfen and ametryn, in tank mixture, to ten sugarcane varieties. It were used the rates of 0.48 and 1.5 kg a.i. / ha, respectively. Herbicides were applied in pre or post-emergence (5 or 29 days after planting). Checks were hand-weeded. It were used the varieties RB 83-5089, RB 80-6043, RB 78-5148, RB 82-5336, RB 83-5486, RB 72- 454, SP 79-1011, SP 70-1143, SP 71-1406 e SP 80-1842. Sugarcane was planted in 03/24th and 25th /1994. In pre-emergence plots, intoxication symptoms (spots with brown color or dead tissues) were observed in 4,72% (RB 83- 5089) to 14,58% (RB 82-5336) of the leaf area. In post-emergence plots, symptoms were observed in 20,16% (SP 71-1406) to 45,44% (80-1842) of the total leaf area. As plant grew, intoxication became weaker. New leaves, after the eighth one, showed no symptoms. The herbicides did not affect sugarcane growth (number of leaves, tillering and plant height), the yield and the quality of the culms.
Intoxication symptoms; herbicide