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Miscanthus × giganteus Response to Preemergence and Postemergence Herbicides

Published online by Cambridge University Press:  20 January 2017

Eric K. Anderson ,
Thomas B. Voigt ,
Germán A. Bollero  and
Aaron G. Hager
Eric K. Anderson
Affiliation:
Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
Thomas B. Voigt
Affiliation:
Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
Germán A. Bollero
Affiliation:
Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
Aaron G. Hager*
Affiliation:
Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
*
Corresponding author's E-mail: hager@illinois.edu.
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Abstract

Miscanthus is a perennial rhizomatous C4 grass being evaluated in the United States as a potential bioenergy feedstock. Weed control during the first two growing seasons is essential for successful establishment. No herbicides are currently labeled for use in Miscanthus grown for biomass, but herbicides used on field corn might be safe to Miscanthus. Greenhouse experiments were conducted in 2007 and 2008 to evaluate the response of Miscanthus to numerous preemergence (PRE) and postemergence (POST) herbicides. Herbicides with activity only on broadleaf species, whether PRE or POST, did not exhibit injury or reduce Miscanthus biomass. Several herbicides, particularly those with significant activity on grass species, exhibited injury ranging from 6 to 71% (scale of 0 to 100) and/or reduced Miscanthus dry mass by 33 to 78%, especially at the highest rates applied. Field experiments were conducted in 2008 and 2009 with a selection of the herbicides used in the greenhouse experiments to evaluate the response of Miscanthus to herbicides applied PRE, POST and PRE followed by POST. Results from the field experiments generally confirmed those from the greenhouse experiments. PRE herbicides and herbicides with broadleaf-specific activity generally did not produce significant injury or reduce aboveground biomass while herbicides with grass activity tended to cause injury ranging from 22 to 25% and/or reduce biomass by 69 to 78%. With some exceptions, results support prior suppositions that herbicides used in corn are safe to use on Miscanthus and may provide potential herbicide options that growers can use when establishing Miscanthus.

La Miscanthus × giganteus, es un zacate C4 perene y rizomatoso que se está evaluando en los EE UU para ser usado como una bio-masa bio-energética potencial. El control de malezas durante los dos primeros períodos de crecimiento es esencial para su establecimiento exitoso. No hay actualmente ningún herbicida etiquetado para ser usado en Miscanthus × giganteus destinado a la producción de biomasa, pero los herbicidas que se utilizan para el cultivo de Zea mays L. podrían ser seguros para el Miscanthus. Se realizaron experimentos de invernadero durante 2007 y 2008 para evaluar la respuesta de Miscanthus a numerosos herbicidas pre-emergentes (PRE) y post emergentes (POST). Los herbicidas con actividad únicamente en especies de hoja ancha, ya sea PRE o POST, no mostraron ningún daño o redujeron la biomasa de Miscanthus. Varios herbicidas, particularmente aquellos con actividad significativa en zacates, mostraron daños que variaron de 6 a 71% (escala de 0 a 100) y/o redujeron la masa seca de Miscanthus de un 33 a un 78%, especialmente cuando se aplicaron las dosis más altas. Se llevaron al cabo experimentos de campo en 2008 y 2007 con una selección de los herbicidas usados en los experimentos de invernadero para evaluar la respuesta de Miscanthus a los herbicidas PRE, POST Y PREfb POST aplicados. Los resultados obtenidos de los experimentos de campo generalmente confirmaron los resultados de los experimentos de invernadero, el herbicida PRE y los de actividad específica para malezas de hoja ancha, mayormente no causaron daños significativos o redujeron la biomasa de la parte aérea mientras que los herbicidas con actividad en zacates tendieron a causar daño que varió de un 22 a un 25% y/o redujeron la biomasa de un 69 a 78%. Con algunas excepciones, los resultados confirmaron las suposiciones anteriores en el sentido de que los herbicidas usados en la producción de Zea maize (L.), son seguros para la Miscanthus y podrían proporcionar opciones potenciales para herbicidas que los productores podrían usar en el establecimiento de la Miscanthus.

Keywords

MiscanthusMiscanthus × giganteus Greef and Deuter ex Hodkinson and RenvoizecornZea mays L.Bioenergy cropbiomass cropherbicide injuryestablishmentphytotoxicityweed control
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 24 , Issue 4 , December 2010 , pp. 453 - 460
Copyright
Copyright © Weed Science Society of America 

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