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June 29, 2007
Giant Ragweed
Dawn Nordby, from left, University of Illinois Extension weed specialist, and research assistants Jon Miller, Mike Butler and Phillip Parrish display giant ragweed plants that grew nearly 11 feet tall at the Northern Illinois Agronomy Research Center near DeKalb. The University of Illinois is a member of the Glyphosate, Weeds and Crops Group, which includes Purdue University. (University of Illinois Extension photo/Lyle Paul)
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