Abstract Background Pre-plant burndown using herbicides is a key practice in no-till cropping systems which has been complicated by the evolution of glyphosate-resistant (R) weed populations in Brazil. Objective To evaluate pre-plant burndown weed control efficacy of glyphosate-containing tank mixtures such that novel, cost-effective control options can be determined. Methods Glyphosate was sprayed alone or tank-mixed with 2,4-D, flumioxazin, saflufenacil, or ammonium-glufosinate onto nutsedge (Cyperus spp.), arrowleaf sida (Sida rhombifolia L.), and glyphosate-R Conyza spp. populations. Treatments ranged from one […]