Marcelo Zimmer is originally from a small family farm in southern Brazil and received his Bachelor’s degree in Agronomy in 2014 from the Federal University of Pelotas (Brazil).  In 2015, Marcelo joined the Purdue Weed Science Lab as an M.S. student under the supervision of Dr. Bill Johnson, where he researched the management of glyphosate-resistant horseweed utilizing a new herbicide active ingredient from Dow AgroSciences [halauxifen-methyl (Elevore)], graduating in 2017.  Currently, Marcelo works as a Weed Science Program Specialist, while also pursuing a Ph.D. degree in Weed Science.  His research is investigating the molecular and physiological basis for the different glyphosate-resistance mechanisms in giant ragweed.