Glyphosate-resistant Palmer amaranth could be the biggest pest in cotton since the boll weevil and has the potential to damage the cotton industry, says a University of Tennessee Extension weed specialist. At a Syngenta-sponsored Webinar Friday, Larry Steckel, University of Tennessee Extension weed specialist, responded to a question from the Mid-South Farmer regarding how big of a problem weed resistance could be in the South, by saying, ”Boll weevil ran cotton of the South and resistant Palmer pigweed can have that potential.”