Knotweed (species unknown) (Fallopia spp.) on May 30, 2013
Submitter has sample
EDRR Status: Local expert notified
Description of specimen
This area was scattered around the property by the construction of the house.
Commentary
Expert Reviewer
Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area
Thank you again for this report of knotweed. As mentioned in my previous response Japanese knotweed is a significant problem invader in riparian communities within Clackamas County.
Please feel free to contact me if you have any additional questions. You may also check these online resources for more information on knotweed.
http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/21809/em9031.pdf
http://your.kingcounty.gov/dnrp/library/water-and-land/weeds/BMPs/Knotweed-Control.pdf
http://www.imapinvasives.org/GIST/ESA/esapages/documnts/polycus.pdf
Again thank you for reporting this invader. All the best,
Sam
______________________________________
Samuel Leininger
WeedWise Program Manager
Clackamas Soil & Water Conservation District
221 Molalla Ave. Suite 102
Oregon City, OR 97045
503-210-6006
weeds@conservationdistrict.org
www.conservationdistrict.org
______________________________________
Samuel Leininger
June 5, 2013, 3:43 a.m.