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Selective Control of Jointed Goatgrass (Aegilops cylindrica) with Imazamox in Herbicide-Resistant Wheat

Published online by Cambridge University Press:  12 June 2017

Daniel A. Ball ,
Frank L. Young  and
Alex G. Ogg JR.
Daniel A. Ball*
Affiliation:
Columbia Basin Agricultural Research Center, Oregon State University, Pendleton, OR 97801
Frank L. Young
Affiliation:
USDA-ARS, Washington State University, Pullman, WA 99164-6421
Alex G. Ogg JR.
Affiliation:
USDA-ARS, Washington State University, Pullman, WA 99164-6421
*
Corresponding author's E-mail: daniel.ball@orst.edu.
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Abstract

Jointed goatgrass (Aegilops cylindrica) is a serious problem for winter wheat producers throughout the western U.S. Interference from this weed can severely reduce grain yield and contaminate harvested grain, resulting in dockage losses. There are currently no selective herbicides registered for controlling jointed goatgrass in wheat. Imazamox, an imidazolinone herbicide, was applied to an imidazolinone herbicide-resistant (IMI) wheat mutant of the winter wheat cultivar ‘Fidel.’ Jointed goatgrass control from spring postemergence application of imazamox ranged from 61 to 97% when applied at 36 g/ha. Negligible crop injury from imazamox treatment was observed at 36 g/ha at several locations under dryland environments in the U.S. Pacific Northwest. Wheat yield was increased 19 to 41% by imazamox treatment in three of four experiments. Percent dockage resulting from jointed goatgrass spikelet contamination of harvested wheat grain was eliminated by imazamox treatment. Introduction of the IMI trait into commercial wheat cultivars could provide an effective method for selective control of jointed goatgrass in winter wheat.

Keywords

Imazamox, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-(methoxymethyl)-3-pyridinecarboxylic acidjointed goatgrass, Aegilops cylindrica Host # AEGCYwinter wheat, Triticum aestivum L. IMI-FidelHerbicide-tolerant cropIMI wheatAEGCYAVEFALOLMUBROTEAHAS, acetohydroxyacid synthaseIMI, imidazolinone herbicide-resistantPNW, Pacific Northwest
Type
Research
Information
Weed Technology , Volume 13 , Issue 1 , March 1999 , pp. 77 - 82
Copyright
Copyright © 1999 by the Weed Science Society of America 

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Footnotes

1

Contribution from Columbia Basin Agricultural Research Center, Oregon State University, Pendleton, OR. Technical paper 11291.

References

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