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Methiozolin Efficacy for Annual Bluegrass (Poa annua) Control on Sand- and Soil-Based Creeping Bentgrass Putting Greens

Published online by Cambridge University Press:  20 January 2017

James T. Brosnan ,
Gerald M. Henry ,
Gregory K. Breeden ,
Tyler Cooper  and
Thomas J. Serensits
James T. Brosnan*
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Building, 2431 Joe Johnson Drive, Knoxville, TN 37996
Gerald M. Henry
Affiliation:
Department of Plant Science, The University of Georgia, 311 Miller Plant Sciences Building, Athens, GA 30602
Gregory K. Breeden
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Building, 2431 Joe Johnson Drive, Knoxville, TN 37996
Tyler Cooper
Affiliation:
Texas Tech University, 15th and Detroit Avenue, Mail Stop 2122, Lubbock, TX 79409
Thomas J. Serensits
Affiliation:
Department of Crop and Soil Sciences, The Pennsylvania State University, 116 Agricultural Sciences and Industries Building, University Park, PA 16802
*
Corresponding author's E-mail: [email protected]
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Abstract

Methiozolin is a new isoxazoline herbicide being investigated for selective POST annual bluegrass control in creeping bentgrass putting greens. Glasshouse and field research was conducted from 2010 to 2012 in Tennessee and Texas to evaluate annual bluegrass control efficacy with methiozolin. Application placement experiments in the glasshouse illustrated that root absorption was required for POST annual bluegrass control with methiozolin at 1,000 g ai ha−1. Soil-plus-foliar and soil-only applications of methiozolin reduced annual bluegrass biomass greater than treatments applied foliar-only. Field experiments evaluated annual bluegrass control efficacy with two application rates (500 and 1,000 g ha−1) and six application regimes (October, November, December, October followed by [fb] November, November fb December, and October fb November fb December) on sand- and soil-based putting greens. Annual bluegrass control with methiozolin at 1,000 g ha−1 on sand-based greens ranged from 70 to 72% compared to 87 to 89% on soil-based greens. Treatment at 500 g ha−1 controlled annual bluegrass 57 to 64% on sand-based greens compared to 72 to 80% on soil-based greens. Most sequential methiozolin application regimes controlled annual bluegrass more than single applications. On sand-based greens, sequential application programs controlled annual bluegrass 70 to 79% compared to 85 to 92% on soil-based greens. Responses indicate that methiozolin is a root-absorbed herbicide with efficacy for selective control of annual bluegrass in both sand- and soil-based creeping bentgrass putting greens.

Methiozolin es un herbicida isoxazoline nuevo que está siendo investigado para el control selectivo POST de Poa annua en “putting greens” del césped Agrostis stolonifera. Se realizaron investigaciones de invernadero y de campo desde 2010 a 2012, en Tennessee y Texas, para evaluar la eficacia de methiozolin en el control de P. annua. En el invernadero, experimentos de localización de la aplicación ilustraron que la absorción por la raíz fue requerida para el control POST de P. annua con methiozolin a 1,000 g ai ha−1. Aplicaciones de methiozolin al suelo y al follaje o solamente al suelo redujeron la biomasa de P. annua más que los tratamientos con aplicaciones solamente foliares. Los experimentos de campo evaluaron la eficacia en el control de P. annua con dos dosis de aplicación (500 y 1,000 g ha−1) y seis regímenes de aplicación (Octubre, Noviembre, Diciembre, Octubre seguido de (fb) Noviembre, Noviembre fb Diciembre, y Octubre fb Noviembre fb Diciembre) en putting greens en arena y en suelo. El control de P. annua con methiozolin a 1,000 g ha−1 en greens en arena varió entre 70 y 72% comparado con 87 a 89% en greens en suelo. Los tratamientos con 500 g ha−1 controlaron P. annua 57 a 64% en greens en arena, comparados con 72 a 80% en greens en suelo. La mayoría de los regímenes secuenciales de aplicación de methiozolin controlaron P. annua más que las aplicaciones individuales. En greens en arena, los programas de aplicaciones secuenciales controlaron P. annua 70 a 79% comparados con 85 a 92% en greens en suelo. Las respuestas indican que methiozolin es un herbicida absorbido por la raíz con eficacia para el control selectivo de P. annua en putting greens de A. stolonifera tanto en arena como en suelo.

Keywords

Methiozolin [5-(2,6-difluorobenzyl) oxymethyl-5-methyl-3-(3methylthiophen-2-yl)-1,2-isoxazoline]annual bluegrass, Poa annua L.creeping bentgrass, Agrostis stolonifera L.Application placementrootzonesoil-plus-foliarsoil physical propertiessoil textureturfweed control
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 27 , Issue 2 , June 2013 , pp. 310 - 316
Copyright
Copyright © Weed Science Society of America 

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