Looking for Palmer amaranth Populations

The weed science programs at Southern Illinois University and the University of Illinois are participating in a research project sponsored by the United Soybean Board to survey and monitor the potential for the evolution of weeds with resistance to glufosinate and dicamba.  Early detection of evolved resistance to these herbicides could alert soybean farmers of the imposing threat in time for changes in management strategies that avoid herbicide failures.  Researchers in Illinois will collect seed from at least two of our most challenging weed species, waterhemp and horseweed (a.k.a. marestail).  We also would like to collect seed from Palmer amaranth and could benefit from your assistance.

If you know of Palmer amaranth populations in soybean fields around the state from which we could collect seed, please let us know.  Contact Dr. Karla Gage at Southern Illinois University (618-453-7679, or kgage@siu.edu) for Palmer amaranth populations south of Interstate 70, or Dr. Aaron Hager at the University of Illinois (217-333-9646, hager@illinois.edu) for populations north of Interstate 70 and we’ll make arrangements to collect seed prior to harvest.