Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods
Japanese knotweed, Sakhalin knotweed, and their hybrid, Bohemian knotweed, are invasive across much of the United States. Monocultures formed by these species threaten natural riparian areas, and effective methods of control are being sought. Injection of herbicide is a relatively new control techni...
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Weed Science Society of America
2008
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ftbioone:10.1614/IPSM-07-013R.1 2023-07-30T04:06:35+02:00 Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods Erin N. Hagen Peter W. Dunwiddie Erin N. Hagen Peter W. Dunwiddie world 2008-01-01 text/HTML https://doi.org/10.1614/IPSM-07-013R.1 en eng Weed Science Society of America doi:10.1614/IPSM-07-013R.1 All rights reserved. https://doi.org/10.1614/IPSM-07-013R.1 Text 2008 ftbioone https://doi.org/10.1614/IPSM-07-013R.1 2023-07-09T10:16:08Z Japanese knotweed, Sakhalin knotweed, and their hybrid, Bohemian knotweed, are invasive across much of the United States. Monocultures formed by these species threaten natural riparian areas, and effective methods of control are being sought. Injection of herbicide is a relatively new control technique with no known published results. Bohemian knotweed was injected with four treatment dosages: 1 ml (0.03 oz) (0.48 g ae) (0.017 oz ae), 3 ml (0.10 oz) (1.44 g ae) (0.05 oz ae), or 5 ml (0.17 oz) (2.4 g ae) (0.08 oz ae) of undiluted glyphosate (suggested application), and 5 ml (0.17 oz) of a glyphosate : water mix (1 : 1, by vol) (1.2 g ae) (0.04 oz ae). Injections were tested at two heights on the plants: low node, 0.2 m (0.66 ft) (L) or chest height node, 1.0 to 1.3 m (3.3 to 4.3 ft) (M). After 1 mo, average percent injury was greater than 90%, and analysis showed no effect of injection location on the stem and no difference between the suggested 5-ml (0.17 oz) glyphosate application and 3-ml (0.10 oz) application. Nine months after treatment there was a reduction in knotweed height and density, though vigorous regrowth was evident within plots. Although the injection method results in the short-term dieback of injected stems, drawbacks to its use in certain scenarios should be considered when developing an integrated management plan for knotweed control.Nomenclature: Glyphosate; Bohemian knotweed, Polygonum x bohemicum (J. Chrtek & A. Chrtkova) P.F. Zika & A.L. Jacobson; Sakhalin knotweed, Polygonum sachalinense F. Schmidt & Maxim; Japanese knotweed, Polygonum cuspidatum Sieb. & Zucc Text Sakhalin BioOne Online Journals Invasive Plant Science and Management 1 1 31 35 |
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BioOne Online Journals |
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ftbioone |
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English |
description |
Japanese knotweed, Sakhalin knotweed, and their hybrid, Bohemian knotweed, are invasive across much of the United States. Monocultures formed by these species threaten natural riparian areas, and effective methods of control are being sought. Injection of herbicide is a relatively new control technique with no known published results. Bohemian knotweed was injected with four treatment dosages: 1 ml (0.03 oz) (0.48 g ae) (0.017 oz ae), 3 ml (0.10 oz) (1.44 g ae) (0.05 oz ae), or 5 ml (0.17 oz) (2.4 g ae) (0.08 oz ae) of undiluted glyphosate (suggested application), and 5 ml (0.17 oz) of a glyphosate : water mix (1 : 1, by vol) (1.2 g ae) (0.04 oz ae). Injections were tested at two heights on the plants: low node, 0.2 m (0.66 ft) (L) or chest height node, 1.0 to 1.3 m (3.3 to 4.3 ft) (M). After 1 mo, average percent injury was greater than 90%, and analysis showed no effect of injection location on the stem and no difference between the suggested 5-ml (0.17 oz) glyphosate application and 3-ml (0.10 oz) application. Nine months after treatment there was a reduction in knotweed height and density, though vigorous regrowth was evident within plots. Although the injection method results in the short-term dieback of injected stems, drawbacks to its use in certain scenarios should be considered when developing an integrated management plan for knotweed control.Nomenclature: Glyphosate; Bohemian knotweed, Polygonum x bohemicum (J. Chrtek & A. Chrtkova) P.F. Zika & A.L. Jacobson; Sakhalin knotweed, Polygonum sachalinense F. Schmidt & Maxim; Japanese knotweed, Polygonum cuspidatum Sieb. & Zucc |
author2 |
Erin N. Hagen Peter W. Dunwiddie |
format |
Text |
author |
Erin N. Hagen Peter W. Dunwiddie |
spellingShingle |
Erin N. Hagen Peter W. Dunwiddie Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods |
author_facet |
Erin N. Hagen Peter W. Dunwiddie |
author_sort |
Erin N. Hagen |
title |
Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods |
title_short |
Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods |
title_full |
Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods |
title_fullStr |
Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods |
title_full_unstemmed |
Does Stem Injection of Glyphosate Control Invasive Knotweeds (Polygonum spp.)? A Comparison of Four Methods |
title_sort |
does stem injection of glyphosate control invasive knotweeds (polygonum spp.)? a comparison of four methods |
publisher |
Weed Science Society of America |
publishDate |
2008 |
url |
https://doi.org/10.1614/IPSM-07-013R.1 |
op_coverage |
world |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
https://doi.org/10.1614/IPSM-07-013R.1 |
op_relation |
doi:10.1614/IPSM-07-013R.1 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1614/IPSM-07-013R.1 |
container_title |
Invasive Plant Science and Management |
container_volume |
1 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
35 |
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1772819279477997568 |