A PhD student under Dr. Bryan Young, Nick Harre is exploring the anomaly of glyphosate-resistant giant ragweed as this highly-competitive weed displays a unique, rapid necrosis response when exposed to glyphosate that has not been observed in other weeds—suggesting this is a novel glyphosate-resistance mechanism.  The distinctiveness of such a response has implications that reach beyond the sole efficacy of glyphosate as this may affect the activity of any herbicide applied along with glyphosate as the development of necrotic lesions likely slow the translocation of co-applied herbicides.  Investigations into activity, influence of environmental/application variables, and interactions between glyphosate and prospective tank-mix partners are being examined with the goal of establishing appropriate recommendations to better control this troublesome weed. Expected Graduation:  May 2017