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Published January 31, 2013, 12:00 AM

Greg Dahl

Greg Dahl, research manager in product development for Winfield Solutions LLC, a Land O’Lakes company, helped developed InterLock, an increasingly popular adjuvant, for more effective pesticide application. Farmers are using numerous tools to come to grips with herbicide resistance in weeds. In this photo, Dahl and a team from Winfield Solutions, attended a Wild World of Weeds workshop on Jan. 16 in Fargo, sponsored by the North Dakota State University Extension Service. (Forum News Service/Agweek/Mikkel Pates)