Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Jul 15, 2021

Originally reported as Knotweed (species unknown) (Fallopia spp.)

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

Description of specimen

I have attached pictures below. One is from the back yard looking down at the property below. The other is the stand of knotweed.

https://photos.app.goo.gl/Wk4jXRmqyP3Du6zz8

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

My property backs up to the Willamette River. The large area of knotweed is between our property and our neighbors.

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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