Iowa State University


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Weed Emergence Poster Available
by Bob Hartzler

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February 10, 2000 -  Improving our ability to predict the emergence timing of weeds in row crops has been a major research emphasis at Iowa State University in recent years.  The latest product of this research is a poster depicting the emergence sequence of sixteen important weeds of the northern corn belt (click here for PDF file).  The poster is a joint project of Iowa State University, University of Illinois, University of Minnesota, University of Wisconsin, and the USDA/ARS.  Much of the information used to develop the poster was developed by the Weed Management Issue Team sponsored by the Leopold Center for Sustainable Agriculture, whereas funding to print the poster was obtained through the North Central Integrated Pest Management Program. 

The poster is available in both 18" by 24" and 8.5" by 11" formats.  Single copies of the poster are free, however there is a postage and handling fee if mailed.  The poster can be obtained at:

Extension Publication Distribution Center
119 Printing and Publications
Iowa State University
Ames, IA  50011

Residents of Minnesota, Wisconsin or Illinois interested in obtaining the poster are encouraged to contact their state extension weed specialists.

In addition to the poster, Iowa State University has two bulletins that provide additional information on weed seeds and emergence.  These bulletins are also available at the Publication Distribution Center.

IPM-48.  Weed seeds and the seedbank:   Implications for weed management. 
SA-11.  Relative emergence sequence for weeds of corn and soybeans.

Persons involved in the development of the poster include:

Project leader:  Bob Hartzler, ISU
Chris Boerboom, University of Wisconsin
Doug Buhler, USDA/ARS, National Soil Tilth Laboratory
Jeff Gunsolus, University of Minnesota
Brent Pringnitz, Iowa State University
Christy Sprague, University of Illinois
Loyd Wax, USDA/ARS, University of Illinois

Prepared by Bob Hartzler, extension weed management specialist, Department of Agronomy, Iowa State University

For more information contact:
ISU Extension Agronomy
2104 Agronomy Hall
Ames, Iowa 50011-1010
Voice: (515) 294-1923
Fax: (515) 294-9985
This site designed and managed by Brent Pringnitz.
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