Glyphosate Resistant Palmer Amaranth - A Threat to Conservation Tillage

Glyphosate resistant Palmer amaranth is present in Alabama, Arkansas, Georgia, Mississippi, North Carolina, South Carolina, and Tennessee. Hundreds of thousands of conservation tillage cotton acres are at risk of being converted to higher-intensity tillage systems. The shift to higher intensity tillage facilitates preplant incorporated and preemergence herbicide control of this problematic weed, especially in dryland cotton production. Integrating high-residue cover crop systems may help facilitate Palmer control in row middles; however, Palmer emerging in the crop row remains a threat to cotton performance.