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Syngenta Quick-Test: A Rapid Whole-Plant Test for Herbicide Resistance

Published online by Cambridge University Press:  20 January 2017

Peter Boutsalis
Peter Boutsalis*
Affiliation:
Syngenta Crop Protection, WST-149, Stein 4332, Switzerland
*
E-mail: [email protected].
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Abstract

A diagnostic test (Syngenta Quick-Test, QT) used for testing grass weed survivors to herbicides in the field for resistance was evaluated. Cuttings from grass weeds were transplanted into pots to regenerate new leaves, then treated with herbicide. In greenhouse experiments, resistance of known herbicide-resistant blackgrass biotypes to the aryloxyphenoxypropanoate herbicides CGA 184927 and fenoxaprop-ethyl and to the phenylurea herbicide isoproturon was verified by the QT. The findings were similar to those for seedlings grown from seed. Rigid ryegrass from suspect resistant fields in South Australia was sampled and sent by post to Switzerland for QT analysis. Resistance was confirmed in less than 4 wk, which verified resistance as responsible for the field failures. The added features of the QT over current resistance tests suggest a likely fit for in-season testing of surviving weeds and possible follow-up action.

Keywords

CGA 184927, (propynyl (R)-2-[4-(5-chloro-3-fluoro-2-pyridyloxy)phenoxy]-propanoate)fenoxaprop-ethylisoproturonblackgrass, Alopecurus myosuroides Huds. #3 ALOMYrigid ryegrass, Lolium rigidum Gaudin # LOLRIResistance testaryloxyphenoxypropanoatephenylureaACCase, acetyl coenzyme A carboxylase (EC 6.4.1.2)APP, aryloxyphenoxypropanoateCHD, cyclohexanedioneDAT, days after treatmentPU, phenylureaQT, Syngenta Quick-TestSU, sulfonylurea
Type
Research
Information
Weed Technology , Volume 15 , Issue 2 , June 2001 , pp. 257 - 263
Copyright
Copyright © Weed Science Society of America 

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References

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