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Response of swallow-wort to herbicides

Published online by Cambridge University Press:  20 January 2017

Frances M. Lawlor  and
Dudley J. Raynal
Dudley J. Raynal
Affiliation:
Department of Environmental and Forest Biology, State University of New York College of Environmental Science and Forestry, 350 Bray Hall, Syracuse, NY 13210
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Abstract

The exotic plant, swallow-wort, a twining perennial of the Milkweed family, has become increasingly invasive in natural areas, successional old fields, and tree plantations on calcareous soils of the lower Great Lakes basin. Because mechanical control strategies are inadequate, swallow-wort's response in natural areas to foliar spray and cut-stem applications of glyphosate and triclopyr was evaluated. Foliar spray applications of glyphosate (3.1 and 7.8 kg ae ha–1) and triclopyr (1.9 kg ae ha–1) were more effective than cut-stem applications of the herbicides (3.1 kg ae ha–1 glyphosate, 1.4 kg ae ha–1 triclopyr). There were no statistical differences in effect among the foliar spray applications. Response to cut-stem application of glyphosate (3.1 and 6.2 kg ha–1) and triclopyr (1.4, 2.8, and 5.6 kg ha–1) in the following year indicated glyphosate to be more effective than triclopyr at all concentrations tested. To effect long-lasting control, all treatments require additional herbicide application.

Keywords

Glyphosatetriclopyrswallow-wort, Vincetoxicum rossicum (Kleo.) Barb., syn. Cynanchum rossicum KleoCynanchumdog-strangling vineswallow-wortblack swallow-wortinvasive plant

Information

Type
Research Article
Information
Weed Science , Volume 50 , Issue 2 , April 2002 , pp. 179 - 185
Copyright
Copyright © Weed Science Society of America 

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