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United States Department of Agriculture

Agricultural Research Service

Title: Postemergence Broadleaf Weed Control in Corn, Dekalb, Illinois, 1996

Authors
item Wax, Loyd
item Hart, Stephen - UNIV OF ILLINOIS
item Maxwell, Douglas - UNIV OF ILLINOIS

Submitted to: Research Report North Central Weed Science Society United States
Publication Type: Other
Publication Acceptance Date: December 20, 1996
Publication Date: N/A

Technical Abstract: The purpose of this experiment was to compare various herbicide treatments for postemergence broadleaf weed control in corn. The study was established at the Dekalb research farm, Dekalb, Illinois. The soil type was a Flanagan silt loam with a pH of 6.2 and 6.0% organic matter. DK 592 corn was planted 1.5 inches deep on May 2 in 30-inch rows. Treatments were arranged in randomized complete blocks with 3 replications of plots 10 by 29 feet. Herbicides were applied with a CO2 backpack sprayer delivering 20 gpa and equipped with 8002 flat fan nozzles. A broadcast application of metolachlor at 1.5 lb/A was applied preemergence. Some corn injury was detected 30 days after post treatments. Most notable was injury from treatments containing clopyralid and flumestulam or SAN 1269. The majority of herbicide treatments provided excellent broadleaf weed control. Exceptions noted were atrazine and bentazon on giant ragweed and MON 12000 on common lambsquarters and Pennsylvania smartweed. The addition of 0.063 lb ai/A of dicamba increased control of these weeds.

Last Modified: 9/1/2014
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