|Hart, Stephen - UNIV OF ILLINOIS|
|Maxwell, Douglas - UNIV OF ILLINOIS|
Submitted to: Research Report North Central Weed Science Society United States
Publication Type: Other
Publication Acceptance Date: December 17, 1996
Publication Date: N/A
Technical Abstract: The purpose of this study was to compare various preemergence herbicide treatments for weed control in soybeans. The study was established at the University of Illinois South Farm, Urbana. The soil was a Drummer silty clay loam with a pH of 6.1 and 5.3% organic matter. Pioneer 9394 soybeans were planted 1.0 inches deep on May 30 in 30 inch rows. Treatments were arranged in randomized complete blocks with 3 replications of plots 10 by 36 feet. Herbicides were applied with a CO2 backpack sprayer delivering 20 gpa and equipped with 8003 flat fan nozzles for soil applications and 8002 nozzles for postemergence. Soybean injury was observed with the majority of herbicide treatments. Injury was most prevalent with high rates of sulfentrazone in combination with metribuzin and metolachlor or FOE5043 and metribuzin. Ample rainfall for herbicide activation accounted for the excellent weed control observed with all herbicide treatments.