Submitted to: Research Report North Central Weed Science Society United States
Publication Type: Other
Publication Acceptance Date: 12/18/1997
Publication Date: N/A
Citation: Interpretive Summary:
Technical Abstract: The purpose of this study was to evaluate weed control programs in glyphosate and glufosinate resistant corn. The study was established at the University of Illinois South Farm, Urbana. The soil was a Flanagan/Drummer silty-clay loam with a pH of 6.1 and 5.5% organic matter. Jeremy glyphosate resistant and Pioneer 34A55 glufosinate resistant corn was planted 1.5 inches deep on April 24 in 30 inch rows. Treatments were arranged in randomized complete blocks with three replications of plots 7.5 by 30 feet. Herbicides were applied with a CO2 backpack sprayer delivering 20 gpa and equipped with 8003 flat fan nozzles for preemergence applications and 8002 flat fan nozzles for postemergence applications. Initial corn injury was observed in Jeremy glyphosate resistant corn. However, this injury did not persist into mid-season. Single applications of glyphosate provided similar levels of weed control. Control of giant foxtail and common waterhemp improved with sequential or by applying atrazine or acetochlor at planting or in combination with glyphosate or glufosinate. Velvetleaf control was improved by the addition of atrazine to glyphosate and glufosinate.