This research was conducted to evaluate the efficiency of herbicide mixtures in the control of two dayflower species, Commelina diffusa and Commelina benghalensis. These species were grown from stem segments in 12 L pots during 120 days. Subsequently, a randomized complete block design with four replicates was performed for each species. The treatments were carfentrazone-ethyl combined to either glyphosate or glyphosate-potassium salt (30 + 720 g ha-1); glyphosate (720 g ha-1) combined to flumioxazin (60 g ha-1), or 2.4-D (670 g ha-1) or metsulfuron methyl (4 g ha-1); oxyfluorfen combined to sulfentrazone (480 + 375 g ha-1); sequential 21 day-spaced applications of (paraquat + diuron) / (carfentrazone-ethyl + glyphosate) (200+400) /(30+720) and (paraquat + diuron) / (paraquat + diuron) (200+400) / (200+400); and no herbicide application as check control. The percentage of weed control and shoot fresh weight were evaluated. The best treatments to control both species were the sequential applications of (paraquat + diuron) / (carfentrazone-ethyl + glyphosate) and of (paraquat + diuron) / (paraquat + diuron), followed by 2.4-D + glyphosate and carfentrazone-ethyl + glyphosate or glyphosate-potassium salt mixtures.
Commelina benghalensis; Commelina diffusa; tank mixture
