"Cotton Industry Concerned Over Weed", herbicide resistant amaranth

Palmer amaranth, a type of pig weed, grows 6 to 10 feet tall. If someone were trying to design a particularly nasty weed, Palmer amaranth could be the model, said Alan York, weed scientist at North Carolina State University in Raleigh.
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Amaranth that resists the most common herbicide used in cotton, glyphostate, has been confirmed in 10 of North Carolina's 100 counties, four of Georgia's 159 counties and is suspected in Tennessee, South Carolina and Arkansas.
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In Georgia, where amaranth has been confirmed in 48 fields, the weed took over some fields and the cotton had to be cut down, rather than harvested, said University of Georgia weed scientist Stanley Culpepper.
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"If we lost conservation tillage in the Southeast the financial and environmental consequences would be nothing short of catastrophic," said Eddie Green, who grew 1,750 acres of cotton on a family farm near Unadilla.