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 various herbicide programs for weed control in corn. The study was established at the Northern Illinois Agronomy Research Farm, Dekalb, Illinois. The soil was a Drummer silty clay loam with a pH of 6.0 and 6.0% organic matter. Pioneer 3489 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 29 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. Corn tolerance was excellent to the majority of herbicide treatments. Injury that did occur was minor. Giant foxtail control was excellent for the majority of treatments. However, giant foxtail control was lower for rimsulfuron and acetochlor applied very early postemergence, or rimsulfuron and acetochlor applied early postemergence. Velvetleaf control tended to be greater with postemergence broadleaf weed herbicides as compared to soil-applied herbicides. A notable exception was velvetleaf control with combinations of acetochlor and RPA201772 plus atrazine. Velvetleaf control tended to be lower with bentazon and bromoxynil as compared to other broadleaf weed herbicides.