Spatt, L.L. Dornelles, S.H.B. Sanchotene, D.M. Brum, A.B. Carloto, B.W. Scherer, M.B. Low-level resistance of Cyperus iria L. to ALS-inhibiting herbicides occurring in the State of Rio Grande do Sul Subjects--Topical Terms: HERBICIDABIÓTIPOCONTROLE QUÍMICO