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Imidazolinone-Resistant Sunflower Tolerance to Imazapic

Published online by Cambridge University Press:  20 January 2017

Eric P. Prostko ,
Timothy L. Grey  and
Jerry W. Davis
Eric P. Prostko*
Affiliation:
Department of Crop & Soil Sciences, The University of Georgia, 104 Research Way, Tifton, GA 31794
Timothy L. Grey
Affiliation:
Department of Crop & Soil Sciences, The University of Georgia, 104 Research Way, Tifton, GA 31794
Jerry W. Davis
Affiliation:
The University of Georgia, 1109 Experiment Street, Griffin, GA 30223
*
Corresponding author's E-mail: eprostko@uga.edu.
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Abstract

Field trials were conducted in Georgia in 2007 to 2008 to evaluate the tolerance of three imidazolinone-resistant sunflower cultivars to POST applications of imazapic. There was no interaction between sunflower cultivar and herbicide treatment. When averaged over sunflower cultivars, imazapic, at 70 and 140 g ai/ha and applied at 30 d after planting, had no effect on sunflower above-ground biomass, plant height, seed-heads per meter row, and seed-head weights. Sunflower response to imazapic was similar to that of imazamox. Imazapic could be used in imidazolinone-resistant sunflower production systems without risk of unacceptable crop injury.

Keywords

Imazamoximazapicsunflower, Helianthus annuus L. ‘Dekalb 3880CL’, ‘Mycogen 8H419CL’, and ‘Mycogen 8N386CL’Clearfield® production systemsherbicide injury
Type
Notes
Information
Weed Technology , Volume 23 , Issue 1 , March 2009 , pp. 188 - 190
Copyright
Copyright © Weed Science Society of America 

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