Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Jun 23, 2013

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

Description of specimen

a medium sized clump of 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

on an island in the Willamette River off Lanes' Turn Road.
the red marker is placed very precisely.
(don't rust the embedded geotag. its off the mark.)

Expert Reviewer

Mr. Vern Holm
Director, Oregon Vegetation Management Association

© 2025 Portland State University | Contact us for questions regarding site content