Submitter has sample
EDRR Status: Population assessed
A large knotweed patch was heavily disturbed following construction. A large amount of material was moved offsite and is likely creating new patches wherever the fill material was disposed.
March 2, 2011, 10:54 p.m.
March 2, 2011, 10:57 p.m.
Knotweed Shrub Complex: Identification, Biology, and Management, Oregon Extension Service
This is the location of a knotweed patch that was recently impacted by a construction site in Oregon City.
Jeff Lesh City of Gresham
© 2023 Portland State University |
for questions regarding site content