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Reference Desk
A collection of useful references for weed management.

Weed Science Archives
A listing of articles that have appeared on this site since November 1996. 

Hot pages on ISU Weed Science
A listing of the top pages accessed by site visitors.

Palmer amaranth resources

Iowa's Noxious Weeds  

Herbicide Sites of Action/Group Numbers

2015 Herbicide Guide for Corn and Soybean Production

Herbicide Ad Hall of Shame

Weed control results - 2013




Herbicide recommendations for 2015 (WC-94) is availableThe 2015 Herbicide Guide for Iowa Corn and Soybean Production is available

Western Iowa Palmer amaranth tour - Summary of the state of Palmer amaranth at known infestations in western Iowa.

Is the term Superweed appropriate? - ISU's two weed scientists debate the buzzword used to grab attention regarding resistant weeds

It's Palmer Time!! - Now is a great time to differentiate Palmer amaranth from waterhemp. Updated on Aug. 21.

Walking the Beans - With all of the talk about superweeds, I thought it appropriate to link to a Greg Brown classic regarding weed management

Palmer amaranth awareness - There's still some work to do!! Report of recent tour of infestations in SW Iowa.

Controlling big weeds - Do you feel lucky? When do you concede the weeds have won?

A case of mistaken identity: Spiny amaranth - The Palmer amaranth reported in Davis county turns out to be spiny amaranth

A positive note regarding Palmer amaranth
- All is not doom and gloom regarding this weed

An abundance of adverse crop responses to herbicides - Discussion of this spring's herbicide injury problems

Fomesafen injury on corn

Historic distribution of weedy pigweeds. Maps of the origins of the pigweeds of Iowa farm fields.

Palmer amaranth in Iowa: Update - Information on known infestations in the state.

Group 4 Resistance in Weeds - A review of current status of weeds resistant to growth regulator herbicides, and the implications of the release of crops resistant to these herbicides.

Take Action: New resourses from regional herbicide resistance project sponsored by the United Soybean Board

Herbicide sites of action Description of sites of action and herbicide group numbers, including listing of products with their group numbers


Palmer amaranth: ID, biology and management

Effectiveness of using multiple sites of acton to manage resistance: Paper describing importance of critically evaluating herbicide programs





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ISU Extension Weed Management
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