In recent years, the presence of glyphosate-resistant pigweed in Mid-South cotton has compelled producers to grow glufosinate (Liberty)-tolerant varieties. In 2015, more than 85 percent of cotton acreage in Arkansas was planted to varieties that are tolerant to glufosinate. This acreage included 11 percent planted to XtendFlex (resistant to dicamba) varieties.However, dicamba applications beyond the current burndown label were not allowed. Almost half of the transgenic entries in the 2015 Arkansas Cotton Variety Test were resistant to dicamba or 2,4-D (Enlist) - a clear indication of the direction of varietydevelopment.
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