Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Apr 26, 2023

Submitter does not have a specimen
EDRR Status: Local expert notified

Description of specimen

Tons of knotweed sprouts coming up on the shore of the Nehalem river after disturbance from the recent heavy rains. Lots of tall dead knotweed around too.

Commentary

Thank you very much for this invasive weed report! Nehalem River has been infested with Knotweed from county line to the bay for a long time. TCSWCD is working north to get Knotweed under control.
That specific site is possibly part of Oregon Department Forestry or private timber company. Reach out to ODF for land ownership.
See our website for Best Management Practices:
https://tillamookcountyswcd.org
-Michael Blankenship, TCSWCD

Michael Blankenship
April 26, 2023, 10:51 a.m.

Remedy

Oregon State University's Solve Pest Problems page has some great information about how to get rid of knotweeds Solve Pest Problems

This is a tricky weed to manage. Consider reaching out to your local Soil & Water Conservation District for technical advice.

Location

Alongside the nehelem river, off a trail by a dispersed campsite on Foss road, after mile marker 11, I think.

Expert Reviewer

Michael Blankenship
Tillamook Soil & Water Conservation District

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