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Preemergence Herbicides Influence Sprig Establishment of ‘TifEagle’ Bermudagrass

Published online by Cambridge University Press:  20 January 2017

Patrick E. McCullough ,
Brian M. Schwartz ,
Timothy Grey  and
Theodore Webster
Patrick E. McCullough*
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA, and Tifton, GA
Brian M. Schwartz
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA, and Tifton, GA
Timothy Grey
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA, and Tifton, GA
Theodore Webster
Affiliation:
Crop Protection and Management Research Unit, U.S. Department of Agriculture-Agricultural Research Service, Tifton, GA
*
Corresponding author's E-mail: pmccull@uga.edu
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Abstract

The presence of weeds during bermudagrass putting green establishment can reduce growth and turf quality. Three field experiments were conducted in Georgia to investigate efficacy of dimethenamid, S-metolachlor, and oxadiazon on the establishment of ‘TifEagle’ bermudagrass from sprigs. Dimethenamid at 0.85 and 1.7 kg ai ha−1, S-metolachlor at 1.1 and 2.2 kg ai ha−1, and oxadiazon at 1.1, 2.2, and 4.4 kg ai ha−1 did not reduce bermudagrass cover from the untreated after 8 wk. S-metolachlor at 4.4 kg ha−1 was the only treatment that reduced sprig cover from the untreated after 12 wk. All S-metolachlor and oxadiazon treatments provided excellent (≥ 90%) green kyllinga control by 8 wk after treatment (WAT) while dimethenamid at 0.85, 1.7, and 3.4 kg ha−1 provided 78, 85, and 92% control, respectively. Dimethenamid treatments provided poor control (< 70%) of spotted spurge but fair control (70 to 79%) was achieved from S-metolachlor at 4.4 kg ha−1 and oxadiazon at 2.2 and 4.4 kg ha−1 by 8 WAT. Overall, low to middle rates of the herbicides tested appear to temporarily inhibit TifEagle bermudagrass sprig establishment but high rates of dimethenamid and S-metolachlor may reduce cover from the untreated.

La presencia de malezas durante el establecimiento del zacate bermuda (Cynodon dactylon × C. transvaalensis Burtt-Davy) en los hoyos de golf puede reducir el crecimiento y la calidad del césped. Se realizaron tres experimentos de campo en Georgia para investigar la eficacia de dimethenamid, S-metolachlor y oxadiazon en el establecimiento del zacate bermuda ‘TifEagle’ a partir de la siembra de estolones. Dimethenamid a 0.85 y 1.7 kg ia ha−1, S-metolachlor a 1.1 y 2.2 kg ia. ha−1 y oxadiazon a 1.1, 2.2 y 4.4 kg ia ha−1 no redujeron la cobertura del zacate en comparación con el testigo no tratado después de 8 semanas. S-metolachlor a 4.4 kg ha−1 fue el único tratamiento que redujo la cobertura de estolones en comparación con el testigo no tratado después de 12 semanas. Todos los tratamientos de S-metolachlor y oxadiazon proporcionaron excelente control (≥90%) de Kyllinga brevifolia a las 8 semanas después del tratamiento, mientras que dimethenamid a 0.85, 1.7, y 3.4 kg ha−1 proporcionó 78, 85 y 92% de control, respectivamente. Los tratamientos de dimethenamid resultaron en un control deficiente (<70%) de Euphorbia maculata, pero un control regular (de 70 a 79%) se logró con S-metolachlor a 4.4 kg ha−1 y oxadiazon a 2.2 y 4.4 kg ha−1 a las 8 semanas después del tratamiento. En general, las dosis bajas o medias de los herbicidas probados parecen inhibir temporalmente el establecimiento del zacate bermuda TifEagle, pero las dosis altas de dimethenamid y S-metolachlor pueden reducir la cobertura en comparación con el testigo no tratado.

Keywords

Hybrid bermudagrass, Cynodon dactylon × C. transvaalensis Burtt-Davygreen kyllinga, Kyllinga brevifolia Rottbspotted spurge, Euphorbia maculata L.Bermudagrasspreemergenceputting greensprigs
Type
Weed Management—Other Crops/AREAS
Information
Weed Technology , Volume 26 , Issue 2 , June 2012 , pp. 300 - 303
Copyright
Copyright © Weed Science Society of America 

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