Japanese Knotweed (Fallopia japonica) on May 21, 2019
Submitter does not have a specimen EDRR Status: Local expert notified
Description of specimen
Sent last year with photos
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
Undeveloped ditches along both sides of Carman Drive spreading to nearest residential yard now
Expert Reviewer
Samuel Leininger Clackamas Soil and Water Conservation District 4-County Cooperative Weed Management Area Columbia Gorge Cooperative Weed Management Area