Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on May 22, 2023

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

Description of specimen

Japanese knotweed

Commentary

None

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

Japanese knotweed. Reported a patch on the oregon City side of the Clackamas River at the Oregon city Gladstone bridge on one side now I'm reporting a patch on the Oregon Sunnyside and Clackamette Park very close to the boat ramp. Between the boat ramp and Willamette river right at the waterline.

Expert Reviewer

Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area

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