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Conversion of ‘Tifway’ Bermudagrass Stands to ‘Zorro’ Zoysiagrass Turf using Combinations of Dazomet and EPTC

Published online by Cambridge University Press:  20 January 2017

Mark C. Doroh ,
J. Scott McElroy ,
Edzard Van Santen  and
Robert H. Walker
Mark C. Doroh
Affiliation:
Department of Agronomy and Soils, Auburn University, Auburn, AL 36849
J. Scott McElroy*
Affiliation:
Department of Agronomy and Soils, Auburn University, Auburn, AL 36849
Edzard Van Santen
Affiliation:
Department of Agronomy and Soils, Auburn University, Auburn, AL 36849
Robert H. Walker
Affiliation:
Department of Agronomy and Soils, Auburn University, Auburn, AL 36849
*
Corresponding author's E-mail: [email protected]
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Abstract

Field experiments were conducted to evaluate the efficacy of herbicides and soil sterilants for the fairway conversion of ‘Tifway’ bermudagrass to ‘Zorro’ zoysiagrass. Treatments included glyphosate (4.48 kg ae ha−1), EPTC (7.84 kg ai ha−1), dazomet (338 kg ai ha−1), siduron (13.4 kg ai ha−1), glyphosate plus ETPC (4.48 + 7.84 kg ha−1), glyphosate plus dazomet (4.48 + 338 kg ha−1), EPTC plus siduron (7.84 + 13.4 kg ha−1), and dazomet plus siduron (338 + 13.4 kg ha−1). Glyphosate treatments were applied 5 wk prior to establishment (WPE), dazomet and EPTC treatments were applied 3 WPE, and siduron was applied at establishment. Dazomet and EPTC treatments were incorporated to a depth of 10 to 15 cm with a rotary tiller and rolled with a weighted roller to reduce losses from volatilization after application. Zorro zoysiagrass was established in June 2008 and 2009 using a mixture of rhizomes and stolons at a rate of 76 cm3 m−2. Results indicate that glyphosate + dazomet, glyphosate + EPTC, dazomet + siduron, and EPTC + siduron were equally effective at controlling Tifway bermudagrass. EPTC and dazomet controlled bermudagrass more effectively when used in combination with glyphosate or siduron. There were no significant differences in bermudagrass cover between the EPTC combinations with glyphosate or siduron and dazomet applied with glyphosate or siduron. Comparing EPTC- and dazomet-alone, EPTC yielded less bermudagrass cover (32%) than dazomet (71%). At present, research is limited on using EPTC for controlling perennial grasses in turfgrass systems. Data from these studies demonstrate the potential use of EPTC as a preplant soil herbicide to control hybrid bermudagrass during zoysiagrass renovation.

Se realizaron experimentos de campo para evaluar la eficacia de herbicidas y esterilizantes de suelo para la conversión de un campo de golf del zacate bermuda híbrido ‘Tifway’ (Cynodon dactylon × C. transvaalensis) al zacate zoysia ‘Zorro’ (Zoysia matrella). Los tratamientos incluyeron glifosato (4.48 kg ea ha−1), EPTC (7.84 kg ia ha−1), dazomet (338 kg ia ha−1), siduron (13.4 kg ia ha−1), glifosato más ETPC (4.48 + 7.84 kg ha−1), glifosato más dazomet (4.48 + 338 kg ha−1), EPTC más siduron (7.84 + 13.4 kg ha−1) y dazomet más siduron (338 + 13.4 kg ha−1). Los tratamientos de glifosato fueron aplicados 5 semanas antes del establecimiento (WPE), los tratamientos de dazomet y EPTC fueron aplicados 3 WPE y el siduron fue aplicado en el momento del establecimiento. Los tratamientos de dazomet y EPTC fueron incorporados a una profundidad de 10 a 15 cm con un cultivador mecánico y aplanados con un rodillo pesado para reducir las pérdidas por volatilización después de la aplicación. El zacate zoysia ‘Zorro’ fue establecido en junio de 2008 y 2009 usando una mezcla de rizomas y estolones a razón de 76 cm3 m−2. Los resultados indican que glifosato + dazomet, glifosato + EPTC, dazomet + siduron y EPTC + siduron fueron igualmente efectivos para controlar ‘Tifway’. El EPTC y dazomet controlaron ‘Tifway‘ con mayor efectividad cuando se usaron en combinación con glifosato o siduron. No hubo diferencias significativas en la cobertura de ‘Tifway’ entre las combinaciones de EPTC con glifosato o siduron y dazomet aplicados con glifosato o siduron. Al comparar EPTC y dazomet aplicados solos, EPTC logró menor cobertura de Tifway (32%) que dazomet (71%). En la actualidad, hay poca investigación en el uso de EPTC para controlar zacates perenes en sistemas de céspedes. Los datos de este estudio demuestran el uso potencial de EPTC como un herbicida para suelo en pre- siembra, para controlar el híbrido ‘Tifway’ durante una renovación de césped con Z. matrella.

Keywords

DazometEPTCglyphosatesiduronhybrid bermudagrass, Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt-Davy ‘Tifway’zoysiagrass or Manilagrass, Zoysia matrella (L.) Merr. ‘Zorro’Bermudagrass controldazometEPTCherbicidesoil sterilantthiocarbamateturfgrass renovationzoysiagrass establishment
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 25 , Issue 4 , December 2011 , pp. 631 - 636
Copyright
Copyright © Weed Science Society of America 

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