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Bermudagrass (Cynodon dactylon) Control with Topramezone and Triclopyr

Published online by Cambridge University Press:  20 January 2017

James T. Brosnan  and
Gregory K. Breeden
James T. Brosnan*
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Bldg., 2431 Joe Johnson Dr., Knoxville, TN 37996
Gregory K. Breeden
Affiliation:
Department of Plant Sciences, The University of Tennessee, 252 Ellington Plant Sciences Bldg., 2431 Joe Johnson Dr., Knoxville, TN 37996
*
Corresponding author's E-mail: jbrosnan@utk.edu
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Abstract

Common bermudagrass is a problematic weed within tall fescue turfgrass. Field research was conducted from 2010 to 2012 in Knoxville, TN, evaluating the efficacy of sequential applications of topramezone (12.5 and 25 g ha−1), triclopyr (1,120 g ha−1), and mixtures of topramezone + triclopyr for bermudagrass control in tall fescue turf. Sequential applications of fenoxaprop + triclopyr (100 + 1,120 g ha−1) were included for comparison. Three applications of each treatment were applied at 21-d intervals during July, August, and September of 2010 and 2011. Plots were stripped to receive tall fescue interseeding at 0 or 490 kg ha−1 during September 2010 and 2011. Bermudagrass control with topramezone + triclopyr mixtures was greater than topramezone or triclopyr applied alone 14 wk after initial treatment (WAIT) each year. In the second year of this study, topramezone + triclopyr mixtures controlled bermudagrass 27 to 50% compared to 27% for fenoxaprop + triclopyr by 52 WAIT. However, bermudagrass control with topramezone + triclopyr mixtures increased to 88 to 92% by 52 WAIT when accompanied with tall fescue interseeding at 490 kg ha−1. Future research should evaluate effects of interseeding on the efficacy of different herbicides for weed control in cool- and warm-season turf.

Cynodon dactylon es una maleza problemática en el césped Lolium arundinaceum. Se realizaron investigaciones de campo entre 2010 y 2012 en Knoxville, TN, para evaluar la eficacia de aplicaciones secuenciales de topramezone (12.5 y 25 g ha−1), triclopyr (1,120 g ha−1), y mezclas de topramezone + triclopyr para el control de C. dactylon en L. arundinaceum. Aplicaciones secuenciales de fenoxaprop + triclopyr (100 + 1,120 g ha−1) fueron incluidas como comparación. Tres aplicaciones de cada tratamiento fueron realizadas a intervalos de 21 días durante Julio, Agosto y Septiembre de 2010 y 2011. Las parcelas fueron preparadas para recibir una entre-siembra de L. arundinaceum a 0 ó 490 kg ha−1 durante Septiembre 2010 y 2011. El control de C. dactylon con mezclas de topramezone + triclopyr fue mayor que topramezone o triclopyr aplicados solos, 14 semanas después del tratamiento inicial (WAIT) cada año. En el segundo año de este estudio, las mezclas de topramezone + triclopyr controlaron C. dactylon 27 a 50% en comparación a 27% con fenoxaprop + triclopyr a 52 WAIT. Sin embargo, el control de C. dactylon con mezclas de topramezone + triclopyr incrementó a 88 a 92% a 52 WAIT cuando estuvo acompañado por la entre-siembra de L. arundinaceum a 490 kg ha−1. Investigaciones futuras deberían evaluar los efectos de la entre-siembra sobre la eficacia de diferentes herbicidas para el control de malezas en céspedes de clima cálido y frío.

Keywords

Fenoxaprop, topramezone, triclopyr, common bermudagrass, Cynodon dactylon (L.) Perstall fescue, Lolium arundinaceum (Schreb.) S. J. DarbyshireEfficacyHPPDinterseedingturfturfgrass
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 27 , Issue 1 , March 2013 , pp. 138 - 142
Copyright
Copyright © Weed Science Society of America 

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