|Hart, Stephen - UNIVERSITY OF ILLINOIS|
|Maxwell, Douglas - UNIVERSITY OF ILLINOIS|
Submitted to: Research Report North Central Weed Science Society United States
Publication Type: Other
Publication Acceptance Date: December 18, 1997
Publication Date: N/A
Technical Abstract: The purpose of this experiment was to evaluate chloroacetamide herbicides applied preemergence at recommended and twice the labeled use rate depending on soil type. The study was established at the University of Illinois South Farm, Urbana, Illinois. The soil was a Flanagan silt loam with a pH of 6.4 and 4.8% organic matter. ICI8541 imidazolinone tolerant corn was planted 1.5 inches deep on April 21 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. A broadcast application of dicamba at 0.5 lb/A was applied early postemergence for broadleaf weed control. Corn was significantly injured by all chloroacetamide herbicides applied at twice the recommended rate. However, this injury did not persist into the growing season. Mid-season giant foxtail control was greatest for both acetochlor compounds and least for CGA77102.