However, with the exception of a 12 ounce rate of Reflex at Clarkton, these products did not adequately control late season emergence of Palmer amaranth. Even though Reflex has been consistent in controlling this troublesome weed, there are crop safety concerns with this product. These concerns are hindering registration therefore keeping the future of this product as a residual cotton herbicide unclear. At this time Reflex is not registered for cotton and should not be used. Glyphosate programs .
Residual herbicides continue to provide significant improvements to glyphosate-based weed control.
Morningglory was difficult to control, even with programs that included herbicides other than glyphosate. At Clarkton, most programs provided good control of crabgrass and Palmer amaranth. There was little reemergence due to the lack of rainfall. In conclusion, the addition of a residual is necessary to maintain season long control. Results suggest that where or when that residual should be applied is dependent on several factors including environment, weeds present, and weed pressure.