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Effect of Selective Amicarbazone Placement on Annual Bluegrass (Poa annua) and Creeping Bentgrass Growth

Published online by Cambridge University Press:  20 January 2017

Matthew D. Jeffries ,
Travis W. Gannon ,
Thomas W. Rufty  and
Fred H. Yelverton
Matthew D. Jeffries*
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695
Travis W. Gannon
Affiliation:
Department of Crop Science, North Carolina State University, Raleigh, NC 27695
Thomas W. Rufty
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
*
Corresponding author's E-mail: mdjeffri@ncsu.edu
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Abstract

Growth chamber experiments were conducted to assess the effects of foliage-only, soil-only, and foliage-plus-soil placements of amicarbazone on annual bluegrass and creeping bentgrass growth. Evaluated herbicide treatments included amicarbazone at 49 or 147 g ai ha−1, as well as bispyribac-sodium at 74 g ai ha−1 for comparative purposes. Data from this research agree with previous reports of amicarbazone plant uptake. Amicarbazone is absorbed via above- and belowground pathways; however, plant growth is inhibited more by root uptake. Compared to foliage-only amicarbazone placement, soil-only placement more than doubled reductions in aboveground biomass and root mass 56 d after treatment (DAT), whereas no differences were detected between placements including soil contact. Across all evaluated parameters in this research, amicarbazone (49 g ha−1) impacted creeping bentgrass growth similarly to bispyribac-sodium, whereas annual bluegrass growth was inhibited more by amicarbazone, suggesting it provides a more efficacious chemical option for end-user applications.

Se realizaron experimentos en cámaras de crecimiento para evaluar los efectos de aplicar amicarbazone solamente en el follaje, solamente en el suelo y en el follaje más el suelo, sobre el crecimiento de Poa annua y Agrostis stolonifera. Los tratamientos de herbicidas evaluados incluyeron amicarbazone a 49 ó 147 g ai ha−1, y bispyribac-sodium a 74 g ai ha−1 para fines de comparación. Los datos de esta investigación concordaron con reportes previos sobre la absorción de amicarbazone, porque este compuesto es absorbido por vías por encima y debajo del suelo. Sin embargo, el crecimiento vegetal es inhibido más cuando la absorción se da por la raíz. Al compararse con la localización foliar del amicarbazone, la localización solamente en el suelo redujo la biomasa aérea y de raíz en más del doble a 56 días después del tratamiento (DAT), mientras que no se detectaron diferencias entre tratamientos que incluyeron contacto con el suelo. A lo largo de todos los parámetros evaluados en esta investigación, amicarbazone (49 g ha−1) impactó el crecimiento de A. stolonifera en forma similar a bispyribac-sodium, mientras que el crecimiento de P. annua fue inhibido más por amicarbazone, lo que sugiere que este herbicida provee una opción química eficaz de control para los usuarios.

Keywords

Amicarbazonebispyribac-sodiumannual bluegrassPoa annua L. var. annuacreeping bentgrassAgrostis stolonifera L. ‘Penn A1’Digital image analysisfoliar absorptionherbicide efficacyherbicide placementroot absorption
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 27 , Issue 4 , December 2013 , pp. 718 - 724
Copyright
Copyright © Weed Science Society of America 

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