Crop Tolerance and Weed Management with Pyroxasulfone in Cotton
Field studies were conducted in 2013 and 2014 on the Texas Southern High Plains to evaluate cotton response and Palmer amaranth control following applications of Zidua (pyroxasulfone). Herbicide applications were applied early-preplant (EPP), preemergence (PRE) and postemergence-directed (PDIR). Early-preplant and PRE applications of Zidua, Warrant, and Dual Magnum were applied at Halfway (clay loam soil) and Lamesa (sandy loam soil). Cotton injury was observed ranging from 20 to 65% following Zidua applied EPP and PRE with greatest injury observed on coarse textured soils. Zidua applied EPP and PRE at either location provided excellent residual control of Palmer amaranth and cotton yield was not reduced by any Zidua application. Postemergence-directed treatments of Zidua and Warrant were applied at Lamesa and Lubbock. No injury or yield reduction was observed following Zidua applied PDIR and excellent residual Palmer amaranth control was achieved.
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