Palmer Amaranth Most Troublesome Weed in US

Major Infestation

North Carolina State University’s Palmer Amaranth Research in Cotton Check Dicamba-based Program

North Carolina State University’s Palmer Amaranth Research in Cotton Check Dicamba-based Program

North Carolina State University’s Palmer Amaranth Research in Soybean Check Dicamba-based Program

Don’t let up on the Palmer Residual + 2,4-D or dicamba preplant burndown; “yellow” herbicide PPI if in conventional tillage At least two residual active ingredients PRE Timely POST; residual in at least one POST Residual layby; layby still has a place in resistance management

Don’t let up on the Palmer Seed from ONE Palmer amaranth plant growing in cotton field; Clayton, NC 2015 1,032,400 seed York, 2015

Total Loss for Soybean Crop

2010 Palmer amaranth survey Glyphosate-resistant, thifensulfuron-susceptible 3% Glyphosate-susceptible, thifensulfuron-resistant 2% Glyphosate- and thifensulfuron-resistant 95%

Preemergence Control 2010