Herbicide-resistance, volunteer corn, grain sorghum, johnsongrass, palmer amaranth
This research was conducted to determine the efficacy of quizalofop (FirstAct) herbicide in herbicide-tolerant grain sorghum. FirstAct herbicide was evaluated for efficacy and crop response in Double Team (ACCase-tolerant) sorghum. All herbicides controlled Palmer amaranth 90% or more and volunteer corn 95% or more late in the season. Johnsongrass control was 86 to 91%. Minor sorghum injury early in the season did not persist. Sorghum receiving FirstAct late postemergence yielded more grain than the nontreated control or sorghum receiving Parallel Plus preemergence.
Currie, Randall S. and Geier, Patrick W.
"Efficacy and Crop Response with FirstAct in ACCase-Tolerant Grain Sorghum,"
Kansas Agricultural Experiment Station Research Reports: