The objective here was to determine the behavior of sulfentrazone in sandy clay soil cultivated with sugar cane. The experimental design was randomized blocks with five replications and three treatments of sulfentrazone (0.0, 0.6 and 1.2 kg ha-1), applied as pre-emergent. Samples of soil (0-10 cm), were regularly collected at 23 times between 0 and 704 days after treatment (DAT). The behavior of sulfentrazone was evaluated by bioassays using sugar beet as test plant, and analysis indicated that for the lower dose (0.6 kg ha-1), the herbicide persisted until 601 DAT. At the end of the test, 704 DAT, the herbicide still persisted for the dose of 1.2 kg ha-1. The persistence of sulfentrazone in soil is long and proportional to applied dose.
residue; bioassay; persistence; Saccharum sp
