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Timing of Oxadiazon and Quinclorac Application on Newly Sprigged Turfgrass Species

Published online by Cambridge University Press:  20 January 2017

Barry J. Brecke ,
Daniel O. Stephenson IV  and
J. Bryan Unruh
Barry J. Brecke*
Affiliation:
West Florida Research and Education Center, Agronomy Department, Environmental Horticulture Department, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
Daniel O. Stephenson IV
Affiliation:
West Florida Research and Education Center, Agronomy Department, Environmental Horticulture Department, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
J. Bryan Unruh
Affiliation:
West Florida Research and Education Center, Agronomy Department, Environmental Horticulture Department, Institute of Food and Agricultural Science, University of Florida, 5988 Highway 90, Building 4900, Milton, FL 32583
*
Corresponding author's E-mail: [email protected].
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Abstract

Tolerance of sprigged ‘Tifsport’ and ‘Tifdwarf’ bermudagrass, ‘Meyer’ zoysiagrass, and ‘Salam’ seashore paspalum to oxadiazon (2,240 g/ha) or quinclorac (840 g/ha) applied 1 wk before sprigging (WBS), at sprigging (AS), 2 wk after sprigging (WAS), and 4 WAS was investigated in the field. Weed control was also evaluated. For both herbicides only the AS application timing injured the turfgrass greater than 22%, and injury for the other application timings ranged from 9 to 19% 5 WAS. When evaluated 8 WAS turfgrass injury following the AS application timing remained at 19%, and injury for all other timings was 8% or less. Eight WAS the 1 WBS, AS, 2 WAS, and 4 WAS application timings achieved 89, 79, 94, and 99% plot coverage, respectively, when averaged over all turfgrass species/cultivars and herbicides. By 13 WAS, all species/cultivars achieved at least 90% plot coverage. Presprigging applications of oxadiazon provided 98 to 100% goosegrass and old world diamond-flower control. Quinclorac applied AS provided greater than 70% control of these weeds. Results indicate that oxadiazon and quinclorac applied AS will cause unacceptable turfgrass injury. If goosegrass and/or old world diamond-flower are problematic, oxadiazon is a feasible choice for control of these weeds, but quinclorac is not.

Tolerancia de los zacates bermuda ‘Tifsport’ y de ‘Tifdwarf,’ ‘Meyer’ zoysiagrass y ‘Salam’ seashore paspalum a los herbicidas oxadiazon (2240 g/ha) o quinclorac (840 hg/ha) aplicados 1 semana antes del espigamiento (WBS), en el espigamiento(AS), 2 semanas después del espigamiento (WAS) y 4 WAS fueron investigados en el campo. El control de maleza fue también evaluado. Para ambos herbicidas solamente el tiempo de aplicación AS dañó el zacate en más del 22%, mientras que el daño para otros períodos de aplicación fue de un 9 a un 19% 5 semanas después de la siembra. Cuando se evaluó el daño en el zacate 8semanas después de la siembra siguiendo el tiempo de aplicación de AS éste permaneció en un 19% mientras que el daño pare cualquier otro tiempo de aplicación fue del 8% o menos. Los períodos de aplicación: 8WAS y 1WBS, AS, 2WAS y 4 WAS alcanzaron 89, 79, 94 y 99% de cobertura, respectivamente, cuando se promedian con todas las otras especies de zacate, cultivares y herbicidas. Para las 13 WAS, todas las especies cultivares alcanzaron al menos 90% de cobertura de la parcela. Las aplicaciones anteriores al espigamiento de oxadiazan proporcionaron de un 98 a un 100% en el control del zacate goose y del old world diamond flower. La aplicación de quinclorac al momento de la siembra proporcionó más del 70% de control de estas malezas. Los resultados indican que oxadiazon y quinclorac aplicados al momento de la siembra causarían daños inaceptables en el zacate. Si el zacate goose y el old world diamond flower son problemáticos, el oxadiazon es una opción factible para el control de estas malezas pero no así el quinclorac.

Keywords

Oxadiazonquincloracgoosegrass, Eleusine indica (L.) Gaertnold world diamond-flower, Oldenlandia corymbosa L.bermudagrass, Cynodon dactylon (L.) Pers. × Cynodon transvaalensis Burtt-Davey ‘Tifsport’, ‘Tifdwarf’ CYNDAzoysiagrass, Zoysia japonica L. ‘Meyer’ ZOYJAseashore paspalum, Paspalum viginatum Swartz, ‘Salam’ PASVATurfgrass tolerancespriggingweed control
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 24 , Issue 1 , March 2010 , pp. 28 - 32
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Current address: Assistant Professor, Louisiana State University, 8208 Tom Bowman Drive, Alexandria, LA 71302.

References

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