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Effects of Herbicides on Growth and Vegetative Reproduction of Creeping Rivergrass

Published online by Cambridge University Press:  20 January 2017

Sunny L. Bottoms ,
Eric P. Webster ,
Justin B. Hensley  and
David C. Blouin
Sunny L. Bottoms
Affiliation:
School of Plant, Environmental and Soil Sciences, 104 M. B. Sturgis Hall, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
Eric P. Webster
Affiliation:
School of Plant, Environmental and Soil Sciences, 104 M. B. Sturgis Hall, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
Justin B. Hensley*
Affiliation:
School of Plant, Environmental and Soil Sciences, 104 M. B. Sturgis Hall, Louisiana State University Agricultural Center, Baton Rouge, LA 70803
David C. Blouin
Affiliation:
Department of Experimental Statistics, 45 Agricultural Administration Building, Louisiana State University, Baton Rouge, LA 70803
*
Corresponding author's E-mail: ewebster@agcenter.lsu.edu.
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Abstract

Studies were conducted to evaluate growth and reproductive capabilities of creeping rivergrass in response to rice herbicide programs. Creeping rivergrass grown from single-node stolon segments, multiple-node stolon segments, and rhizomes was treated with various herbicides to evaluate activity on subsequent growth and viability of nodes produced from treated plants. Comparison with the nontreated, cyhalofop, glyphosate, and imazethapyr reduced creeping rivergrass fresh weight by more than 84 to 96%. Glyphosate reduced sprouting of nodes from treated plants 93% compared with nontreated plants. Activity from these herbicides may decrease when applied to plants grown from rhizomes versus rhizome clusters. Plants treated with cyhalofop, glyphosate, and imazethapyr had reduced fresh weight of 36 to 46% when plants were grown from a rhizome cluster, and 69 to 90% when plants were grown from a single rhizome segment, compared with nontreated. Cyhalofop and glyphosate reduced node sprouting by 81 to 98% of nontreated, regardless of parent structure.

Se llevaron a cabo estudios para evaluar el crecimiento y las capacidades reproductivas de Echinochloa polystachya en respuesta a programas de herbicidas en el cultivo del arroz. E. polystachia cultivada a partir de segmentos de estolones de un solo nudo, de múltiples nudos y de rizomas, se trataron con varios herbicidas para evaluar su actividad en el subsecuente crecimiento y viabilidad de los nudos derivados de las plantas tratadas. El cyhalofop, glyphosate e imazethapyr redujeron el peso fresco en 84 a 96% en comparación al testigo no tratado. El glyphosate también redujo en 93% el brote de nudos en las plantas tratadas, en comparación con las no tratadas. La acción de estos herbicidas podría disminuirse cuando se aplica a plantas derivadas de rizomas versus grupos de rizomas. El cyhalofop, glyphosate e imazethapyr redujeron el peso fresco en 36 a 46% en comparación al testigo no tratado, cuando las plantas se cultivaron a partir de un grupo de rizomas y en 69 a 90% en comparación con los testigos no tratados, cuando las plantas se cultivaron a partir de un solo segmento de rizoma. El cyhalofop y el glyphosate redujeron el brote de nudos en 81 a 98% en comparación con las plantas no tratadas sin importar la estructura parental.

Keywords

Cyhalofopglyphosateimazethapyrcreeping rivergrass, Echinochloa polystachya (Kunth) A.S. Hitchcrice, Oryza sativa L.Perennial grassinvasive weedvegetative reproduction
Type
Weed Biology and Competition
Information
Weed Technology , Volume 25 , Issue 2 , June 2011 , pp. 262 - 267
Copyright
Copyright © Weed Science Society of America 

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References

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