[MAIPC] Interesting article just out on Japanese Knotweed treatment/control

[Bailey, Whitney - FS]

Extending the Timeframe for Rapid
Response and Best Management Practices
of Flood-Dispersed Japanese Knotweed
(Fallopia japonica)
Brian P. Colleran and Katherine E. Goodall
Invasive Plant Science and Management 2015 8:250-253

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."

[Forest Service Shield]

Whitney Bailey
Forest Ecologist

Forest Service
Monongahela National Forest

p: 304-636-1800 x280
whitneybailey at fs.fed.us<mailto:whitneybailey at fs.fed.us>

200 Sycamore St.
Elkins, WV 26241
www.fs.fed.us<http://www.fs.fed.us/>
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Caring for the land and serving people




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