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Macartney Rose (Rosa bracteata) Response to Herbicide and Mowing Treatments

Published online by Cambridge University Press:  20 January 2017

Stephen F. Enloe ,
William N. Kline ,
Jatinder S. Aulakh ,
Rachel K. Bethke ,
Jonathan B. Gladney  and
Dwight K. Lauer
Stephen F. Enloe*
Affiliation:
Department of Agronomy and Soils, Auburn University, Auburn, AL 36849
William N. Kline
Affiliation:
Dow AgroSciences, Ball Ground, GA 30107
Jatinder S. Aulakh
Affiliation:
Department of Agronomy and Soils, Auburn University, Auburn, AL 36849
Rachel K. Bethke
Affiliation:
Department of Agronomy and Soils, Auburn University, Auburn, AL 36849
Jonathan B. Gladney
Affiliation:
Silvics Analytic, Wingate, NC 28174
Dwight K. Lauer
Affiliation:
Alabama Cooperative Extension System, Greensboro, AL 36744
*
Corresponding author's E-mail: sfe0001@auburn.edu
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Abstract

Macartney rose is an aggressive thorny shrub that displaces forage species and hinders cattle grazing in rangelands and pastures of the southern United States. Historically, Macartney rose has proven to be extremely difficult to control even with high rates of soil residual herbicides such as picloram. Recent advances in herbicide chemistry warrant testing on this troublesome species. We compared mowing and late summer broadcast applications of thirteen herbicide treatments that included combinations of aminopyralid, fluroxypyr, metsulfuron, picloram, triclopyr, and 2,4-D. Treatments were applied to the same rose clumps for 2 consecutive yr. An additional mowing was done to one half of the rose clumps in each treatment 6 mo after the second herbicide treatment. At 11 mo after initial treatment (MAIT), mowing and all herbicide treatments performed very poorly and provided 35% control or less. At 12 mo after retreatment (24 MAIT), picloram + 2,4-D and aminopyralid + metsulfuron, both followed by mowing, were the most effective treatments, providing 72 to 91% control. All other treatments provided less than 70% control. However, complete clump mortality was very low across all treatments, ranging from 3 to 32%. These results indicate that Macartney rose suppression is possible with certain new herbicides, but complete clump kill is still lacking.

Keywords

Aminopyralidfluroxypyrmetsulfuronpicloramtriclopyr2,4-DMacartney rose Rosa bracteata J. C. Wendl. ROSBCInvasive rosesmechanical controlpasture weed control
Type
Research
Information
Invasive Plant Science and Management , Volume 6 , Issue 2 , June 2013 , pp. 260 - 267
Copyright
Copyright © Weed Science Society of America 

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