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Effect of Reed-Sedge Peat Moss on Hybrid Bermudagrass Injury with Indaziflam and Prodiamine in Sand-Based Root Zones

Published online by Cambridge University Press:  20 January 2017

Patrick A. Jones ,
James T. Brosnan ,
Dean A. Kopsell  and
Greg K. Breeden
Patrick A. Jones*
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Building, 2431 Joe Johnson Drive, Knoxville, TN 37996-4561
James T. Brosnan
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Building, 2431 Joe Johnson Drive, Knoxville, TN 37996-4561
Dean A. Kopsell
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Building, 2431 Joe Johnson Drive, Knoxville, TN 37996-4561
Greg K. Breeden
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Building, 2431 Joe Johnson Drive, Knoxville, TN 37996-4561
*
Corresponding author's E-mail: patajone@utk.edu
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Abstract

PRE herbicides have been reported to injure both the foliage and roots of hybrid bermudagrass turf established in sand culture. Research was conducted to evaluate the influence of reed-sedge peat moss (RSPM) on hybrid bermudagrass injury following PRE herbicide applications to plants established in sand culture. Washed sod plugs were established in mini-rhizotrons constructed with sand root-zones varying in organic carbon content (0.000, 0.003, 0.007, and 0.012 kg kg−1). Herbicide treatments included indaziflam (35 and 52.5 g ai ha−1) and prodiamine (840 g ai ha−1). Significant foliar injury was only observed with indaziflam at 52.5 g ha−1. When applied to plants in sand with no detectable (0.000 kg kg−1) organic carbon, foliar injury measured 61% by 6 wk after treatment. Comparatively, injury with indaziflam at 52.5 g ha−1 was reduced by 40% with applications to plants established in sand with 0.007 kg kg−1 organic carbon. Root length, root length density, and root surface area were greatest in sand-based root zones with ≥ 0.007 kg kg−1 organic carbon regardless of herbicide treatment; however, only indaziflam (52.5 g ha−1) and prodiamine-treated plants exhibited diminished root parameters relative to the nontreated check. Data in the current study illustrate that RSPM can affect above- and belowground injury following PRE herbicide applications to hybrid bermudagrass in sand root-zones.

Los herbicidas PRE han sido reportados como causantes del daño en el follaje y las raíces del césped bermuda híbrido en cultivo en arena. Se realizó una investigación para evaluar la influencia del musgo Sphagnum (RSPM) sobre el daño del césped bermuda híbrido después de aplicaciones de herbicidas PRE a plantas establecidas en cultivo en arena. Fragmentos lavados de estolones enraizados fueron establecidos en mini-rizotrones construidos con zonas de crecimiento radical de arena con un contenido variable de carbono orgánico (0.000, 0.003, 0.007, y 0.012 kg kg−1). Los tratamientos con herbicidas incluyeron (indaziflam 35 y 52.5 g ai ha−1) y prodiamine (840 g ai ha−1). Se observó un daño foliar significativo con indaziflam a 52.5 g ha−1. Cuando se aplicó a plantas en arena con carbono orgánico no detectable (0.000 kg kg−1), el daño foliar fue 61% a 6 semanas después del tratamiento. Comparativamente, el daño con indaziflam a 52.5 g ha−1 fue reducido en 40% con aplicaciones a plantas establecidas en arena con 0.007 kg kg−1 carbono orgánico. Las máximas longitud, longitud-densidad y área superficial de las raíces se observaron en zonas de crecimiento radical de arena con ≥0.007 kg kg−1 carbono orgánico sin importar el tratamiento del herbicida. Sin embargo, solamente plantas tratadas con indaziflam (52.5 g ha−1) y prodiamine exhibieron disminuciones en los parámetros de raíz en relación con el testigo no tratado. Los datos del presente estudio ilustran cómo RSPM puede afectar el daño del tejido aéreo y subterráneo en el césped bermuda híbrido posterior a aplicaciones de herbicidas PRE en las zonas de crecimiento radical en arena.

Keywords

Indaziflamprodiaminehybrid bermudagrassCynodon dactylon (L.) Pers. × Cynodon transvaalensis Burtt-DaveyCellulose biosynthesis inhibitorinjurymitotic inhibitor; organic matterpreemergencetoleranceturfgrass
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 27 , Issue 3 , September 2013 , pp. 547 - 551
Copyright
Copyright © Weed Science Society of America 

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