International Survey of Herbicide Resistant Weeds

By MOA 2007!	By Year 2007!	Distribution	Triazine

Worst Weeds	ALS inhibitors	ACCase inhibitors	Glyphosate

Click on graphs for full size image.

NEW BOOK CHAPTER - Dr. Ozair Chaudhry 2008. Herbicide-Resistance and Weed Resistance Management.

Glyphosate Resistant Johnsongrass Review

International Society of Weed Science Conference - 2008, Canada, BC.

Glyphosate Resistant Palmer Amaranth found in Roundup Ready Cotton

New Italian Resistance Research - Paper 1- ALS resistant pigweed, Paper 2 - Resistant Weeds of Rice in Italy - Maurizio Sattin

Criteria for Confirmation of Herbicide-Resistant Weeds PDF- with specific emphasis on confirming low level resistance.

ACCase Mutation Table PDF By: Christophe Délye, Dijon cédex. delye@dijon.inra.fr

Herbicide Resistance Studies in Yugoslavia - Dr. Branko Konstantinovic

Online Book: Mechanism of Herbicide Resistance in Weeds PDF By: Nishanth Tharayil-Santhakumar, Plant &Soil Sciences University of Massachusetts Amherst, MA.

GLYPHOSATE RESISTANCE IN HORSEWEED (CONYZA CANADENSIS) FROM A WESTERN KENTUCKY FARM. PDF By: C.B. Rogers. Department of Agricultural and Human Sciences, Morehead State University, Morehead, KY 40351.

The effect of low growth temperature on Hill reaction and Photosystem 1 activities in three biotypes of Kochia scoparia (L.) Schrad. with different sensitivity to atrazine and ALS-inhibiting herbicides. D. Holá1, M. Koèová1, O. Rothová1, D. Chodová2, J. Mikulka2

Herbicide Resistant Weeds in Korea - PowerPoint (4 mb) - Tae Seon Park

Another Glyphosate Resistant Weed Identified - Plantago lanceolata - Andrew Cairns View Photo Here

Also see the recently identified glyphosate resistant Conyza bonariensis - Andrew Cairns

Glyphosate Resistant Horseweed Map by county - by Joseph Dauer

Paper on Glyphosate Resistant Lolium multiflorum

ALS Mutations from Herbicide-Resistant Weeds
This new section of the website focuses on the amino acid substitutions that confer resistance to ALS inhibitor herbicides. We aim to expand this section to include data on mutations that confer resistance to other herbicide modes of action. The current section is based on a recent paper: "Tranel, P. J., and Wright, T. R. (2002). Resistance of weeds to ALS-inhibiting herbicides: What have we learned? WeedScience, 50: 700-712."

The section is maintained by Patrick Tranel and Terry Wright.

Papers on ACCase Resistance Mechanisms from France

Recent books on herbicide resistance

US Herbicide Trade Name Database - herbicide modes of action

Herbicide Mode of Action Poster
HRAC has produced a poster illustrating the grouping of herbicides and their chemical structures. Click here to view the poster.

PREVENTION AND MANAGEMENT OF HERBICIDE RESISTANT WEEDS IN RICE.
Download this new book on herbicide resistance weeds of rice - Free - Click Here English and Spanish versions.

Glyphosate Resistant Ryegrass in South Africa and NSW (Australia) - Pictures of NSW infestations here - Pic1, Pic2, Pic3 - Thanks to Andrew Storrie Andrew.Storrie@agric.nsw.gov.au

HELP