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Nicosulfuron Use with Foramsulfuron and Sulfentrazone for Late Summer Goosegrass (Eleusine indica) Control in Bermudagrass and Seashore Paspalum

Published online by Cambridge University Press:  20 January 2017

Patrick E. McCullough ,
Diego Gómez de Barreda  and
Paul Raymer
Patrick E. McCullough*
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223
Diego Gómez de Barreda
Affiliation:
Universitat Politècnica de València, València, Spain
Paul Raymer
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223
*
Corresponding author's E-mail: pmccull@uga.edu
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Abstract

Late summer goosegrass control is difficult in turfgrass as POST herbicide efficacy is reduced on mature plants. Field experiments were conducted to evaluate single and sequential nicosulfuron applications tank-mixed with foramsulfuron or sulfentrazone for late summer goosegrass control and safety to bermudagrass and seashore paspalum. All single-treatment applications controlled goosegrass < 62%, whereas sequential sulfentrazone, nicosulfuron, and nicosulfuron + sulfentrazone applications controlled goosegrass 52, 73, and 84%, respectively. Sequential foramsulfuron applications controlled goosegrass < 55% but nicosulfuron tank-mixtures did not improve control. Bermudagrass was injured < 20% by 1 and 3 wk after all single and sequential treatments. Sequential treatments of nicosulfuron alone or tank-mixed with sulfentrazone caused unacceptable seashore paspalum injury (> 20%) 1 and 3 wk after the second application, whereas foramsulfuron or sulfentrazone alone applied sequentially caused < 17% injury. Seashore paspalum seedhead control at 9 wk after intial treatment was poor (< 70%) from all single-application treatments and sequential sulfentrazone applications, but control was good (80 to 89%) to excellent (> 90%) from all other treatments. Overall, sequential treatments of nicosulfuron alone or tank-mixed with sulfentrazone appear to have potential for POST control of mature goosegrass in bermudagrass, but seashore paspalum injury was unacceptable.

El control de Eleusine indica, tarde en el verano, se dificultaen céspedes ya que la eficacia de herbicidas POST se reduce en plantas maduras. Se realizaron experimentos de campo para evaluar aplicaciones únicas y secuenciales de nicosulfuron mezclados en tanque con foramsulfuron o sulfentrazone para el control de E. indica tarde en el verano, así como la seguridad de su uso en Cynodon dactylon y Paspalum vaginatum. Todos los tratamientos de una sola aplicación controlaron E. indica<62% mientras que aplicaciones secuenciales de sulfentrazone, nicosulfuron, y nicosulfuron + sulfentrazone controlaron E. indica52, 73 y 84%, respectivamente. Las aplicaciones secuenciales de foramsulfuron controlaron E. indica<55% pero las mezclas con nicosulfuron no mejoraron el control. El daño sufrido por C.dactylon fue <20% en las semanas 1 y 3 después de todos los tratamientos únicos y secuenciales. Los tratamientos secuenciales de sólo nicosulfuron o mezclado con sulfentrazone causaron daño inaceptable (>20%) en P. vaginatuma 1 y 3 semanas después de la segunda aplicación, mientras que foramsulfuron o sulfentrazone por sí solos aplicados secuencialmente causaron un daño de<17%. El control de formación espigas de P. vaginatuma las 9 WAIT fue pobre (<70%) a partir de los tratamiento de aplicación única y los secuenciales de sulfentrazone, pero el control fue de bueno (80 a 89%) a excelente (>90%) en el resto de los tratamientos. En general, los tratamientos secuenciales de solo nicosulfuron o mezclado con sulfentrazone parecen tener potencial para el control POST de E. indica madura en C.dactylon, pero el daño a P. vaginatum fue inaceptable.

Keywords

Bermudagrass, Cynodon dactylon L.goosegrass, Eleusine indica L.seashore paspalum, Paspalum vaginatum SwGoosegrassherbicideseedheadturf
Type
Notes
Information
Weed Technology , Volume 26 , Issue 2 , June 2012 , pp. 376 - 381
Copyright
Copyright © Weed Science Society of America 

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