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Assessment of Weed Control Strategies for Corn in the North-Central United States

Published online by Cambridge University Press:  20 January 2017

Brent E. Tharp ,
James J. Kells ,
Thomas T. Bauman ,
R. Gordon Harvey ,
William G. Johnson ,
Mark M. Loux ,
Alex R. Martin ,
Douglas J. Maxwell ,
Micheal D. K. Owen  and
David L. Regehr
...Show all authors
Brent E. Tharp
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824-1325
James J. Kells*
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824-1325
Thomas T. Bauman
Affiliation:
Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47607
R. Gordon Harvey
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
William G. Johnson
Affiliation:
Department of Agronomy, University of Missouri, Columbia, MO 65211
Mark M. Loux
Affiliation:
Department of Horticulture and Crop Science, The Ohio State University, Columbus, OH 43210
Alex R. Martin
Affiliation:
Agronomy Department, University of Nebraska, Lincoln, NE 68503
Douglas J. Maxwell
Affiliation:
Department of Crop Sciences, University of Illinois, Urbana, IL 61801
Micheal D. K. Owen
Affiliation:
Department of Agronomy, Iowa State University, Ames, IA 50011
David L. Regehr
Affiliation:
Department of Agronomy, Kansas State University, Manhattan, KS 66506
Jon E. Warnke
Affiliation:
Warnke Research, Geneva, MN 56035
Robert G. Wilson
Affiliation:
Panhandle Research Station, University of Nebraska, Scottsbluff, NE 69361
Leon J. Wrage
Affiliation:
Department of Plant Sciences, South Dakota State University, Brookings, SD 57007
Bryan G. Young
Affiliation:
Department of Plant, Soil, and General Agriculture, Southern Illinois University, Carbondale, IL 62901
Caleb D. Dalley
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824-1325
*
Corresponding author's E-mail: [email protected]
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Abstract

Field experiments were conducted across the north-central United States to determine the benefits of various weed control strategies in corn. Weed control, corn yield, and economic return increased when a preemergence (PRE) broad-spectrum herbicide was followed by (fb) postemergence (POST) herbicides. Weed control decisions based on field scouting after a PRE broad-spectrum herbicide application increased weed control and economic return. Application of a PRE grass herbicide fb a POST herbicide based on field scouting resulted in less control of velvetleaf and morningglory species, corn yield, and economic return compared with a PRE broad-spectrum herbicide application fb scouting. Cultivation after a PRE broad-spectrum herbicide application increased weed control and corn yield compared with the herbicide applied alone, but economic return was not increased. An early-postemergence herbicide application fb cultivation resulted in the highest level of broadleaf weed control, the highest corn yield, and the greatest economic return compared with all other strategies. Weed control based on scouting proved to be useful in reducing the effect of weed escapes on corn yield and increased economic return compared with PRE herbicide application alone. However, economic return was not greater than the PRE fb planned POST or total POST strategies.

Keywords

Morningglory species, Ipomoea spp.velvetleaf, Abutilon theophrasti L. Medicus # ABUTHcorn, Zea mays L.Abutilon theophrastiABUTHCHEALChenopodium albumcultivationeconomic analysisfield scoutingIpomoea spp.IPOSSSetaria spp.SETSSweed control systemsEPOST, early postemergencefb, followed byPOST, postemergencePRE, preemergence
Type
Research
Information
Weed Technology , Volume 18 , Issue 2 , June 2004 , pp. 203 - 210
Copyright
Copyright © Weed Science Society of America 

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