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Extending the Timeframe for Rapid Response and Best Management Practices of Flood-Dispersed Japanese Knotweed (Fallopia japonica)

Published online by Cambridge University Press:  20 January 2017

Brian P. Colleran  and
Katherine E. Goodall
Brian P. Colleran*
Affiliation:
Polatin Ecological Services, P.O. Box 511, Turners Falls, MA 01376
Katherine E. Goodall
Affiliation:
Environmental Studies Program, Wellesley College, 106 Central Street, Wellesley, MA 02481
*
Corresponding author's E-mail: Brian@polatineco.com
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Abstract

The objective of this article is to extend the reported period in which flood-distributed knotweed propagules may be successfully managed using only manual labor. During a second round of early detection and rapid response (EDRR) management along the Green River in Guilford, VT, we collected and measured all Japanese knotweed propagules that had been distributed by flooding approximately 21 mo earlier, in August 2011, at a single site. Our data suggest that knotweed s.l. prioritizes the growth of new stems over new rhizomes at the start of a growing season. Because the limiting factor for successful removal of new knotweed s.l. plants by hand is the size of the rhizome system, our findings support extending the time frame for EDRR management of flood-distributed knotweed s.l. into the second spring after its initial dispersal. Additionally, in November 2013, surveys of our work sites found no new knotweed s.l. plants in locations accessible to work crews. In addition to validating our EDRR management techniques, this implies that knotweed s.l. fragment viability does not extend past the second spring following its dispersal.

Keywords

Knotweed sensu latoJapanese knotweedPolygonum cuspidatum Siebold & Zucc.Fallopia japonica (Houtt.) Ronse Decr.Reynoutria japonica Houtt.Climate changeearly detectionerosionfloodingknotweed growthknotweed propagulesknotweed spreadrapid responseriparian invasivesTropical Storm Irenevolunteer knotweed control
Type
Research Article
Information
Invasive Plant Science and Management , Volume 8 , Issue 2 , June 2015 , pp. 250 - 253
Copyright
Copyright © Weed Science Society of America 

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References

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