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Selective Exposure of Yellow Nutsedge (Cyperus esculentus), Purple Nutsedge (Cyperus rotundus), and False Green Kyllinga (Kyllinga gracillima) to Postemergence Herbicides

Published online by Cambridge University Press:  20 January 2017

Travis W. Gannon ,
Fred H. Yelverton  and
Lane P. Tredway
Travis W. Gannon*
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695
Fred H. Yelverton
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695
Lane P. Tredway
Affiliation:
Department of Plant Pathology, North Carolina State University, Campus Box 7616, Raleigh, NC 27695
*
Corresponding author's E-mail: travis_gannon@ncsu.edu
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Abstract

Greenhouse experiments were conducted to evaluate the effect of selective herbicide placement on sedge shoot number, shoot weight, and root weight. Sulfentrazone, sulfosulfuron, and trifloxysulfuron were applied to soil only, foliage only, or soil plus foliage. Sulfentrazone provided greater yellow nutsedge and false green kyllinga growth reduction compared to purple nutsedge. Sulfosulfuron provided greater purple nutsedge and false green kyllinga growth reduction compared to yellow nutsedge; these species responded similarly to trifloxysulfuron. Soil and soil plus foliar applications provided the highest level of growth suppression, indicating herbicide–soil contact is required for optimum sedge control with these three herbicides. Future research should evaluate techniques that optimize herbicide–soil contact to improve herbicide efficacy.

Se realizaron experimentos de invernadero para evaluar el efecto de la localización selectiva de herbicida sobre el número de brotes, el peso de estos y el de las raíces de tres especies de malezas. Sulfentrazone, sulfosulfuron y trifloxysulfuron fueron aplicados solamente al suelo, solamente al follaje o al suelo y al follaje. Sulfentrazone proporcionó mayor reducción en el crecimiento de Cyperus esculentus y Kyllinga gracillima en comparación con Cyperus rotundus. Sulfosulfuron proporcionó mayor reducción en el crecimiento de C. rotundus y K. gracillima en comparación a C. esculentus, mientras estas especies respondieron de manera similar a trifloxysulfuron. Las aplicaciones solamente al suelo y al suelo y follaje proporcionaron el más alto nivel de supresión en el crecimiento, indicando que se requiere contacto del herbicida con el suelo para optimizar el control de los brotes de la maleza con estos tres herbicidas. Investigaciones futuras deben evaluar técnicas que optimicen el contacto herbicida-suelo para mejorar la efectividad del herbicida.

Keywords

Sulfentrazonesulfosulfurontrifloxysulfuronfalse green kyllinga, Kyllinga gracillima Miq.purple nutsedge, Cyperus rotundus L.yellow nutsedge, Cyperus esculentus L.Foliar absorptionherbicide efficacyroot absorptionsedge control
Type
Weed Management—Other Crops/AREAS
Information
Weed Technology , Volume 26 , Issue 2 , June 2012 , pp. 294 - 299
Copyright
Copyright © Weed Science Society of America 

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