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Screening for Herbicide Resistance in Weeds

Published online by Cambridge University Press:  20 January 2017

Hugh J. Beckie ,
Ian M. Heap ,
Reid J. Smeda  and
Linda M. Hall
Hugh J. Beckie*
Affiliation:
Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, Canada S7N 0X2
Ian M. Heap
Affiliation:
WeedSmart, P.O. Box 1365, Corvallis, OR 97339
Reid J. Smeda
Affiliation:
Department of Agronomy, University of Missouri, Columbia, MO 65211
Linda M. Hall
Affiliation:
Agronomy Unit, Alberta Agriculture, Food and Rural Development, 6903 116 Street, Edmonton, AB, Canada T6H 5Z2
*
Corresponding author's E-mail: [email protected].
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Abstract

Diagnosing herbicide-resistant weeds as a first step in resistance management and monitoring their nature, distribution, and abundance demands efficient and effective screening tests. This review summarizes and recommends appropriate seed sampling techniques, protocols for screening weeds for resistance to herbicides of different sites of action, interpretation of results, and information given to the grower. Elements common to all screening procedures are reviewed. Choosing appropriate discriminating doses to distinguish between resistant and susceptible weed biotypes is the most important factor in achieving accurate and consistent results. Interpretation of results is also critical because resistant weeds may comprise a small portion of the population in suspected accessions or biotypes.

Keywords

Bioassaydiscriminating doseseed samplingsite of actionsurveysACCase, acetyl-CoA carboxylase (EC 6.4.1.2)ALS, acetolactate synthase (EC 4.1.3.18)AOPP, aryloxyphenoxy propionateCHD, cyclohexanedioneDAT, days after treatmentEPSP synthase, 5-enolpyruvylshikimate-3-phosphate synthase (EC 2.5.1.19)KARI, ketol-acid reductoisomerase (EC 1.1.1.86)POST, postemergencePRE, preemergenceR, resistantS, susceptible
Type
Review
Information
Weed Technology , Volume 14 , Issue 2 , June 2000 , pp. 428 - 445
Copyright
Copyright © Weed Science Society of America 

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References

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