Japanese Knotweed (Fallopia japonica) on Jun 3, 2012
Originally reported as Knotweed (unknown species) (Fallopia sp.)
Submitter does not have a specimen
EDRR Status: Local expert notified
Description of specimen
this is a persistent area next to a creek that is treated regularly by someone, but it's really profuse right now.
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 for reporting this infestation of knotweed. Knotweed is a significant problem invader in riparian communities within Clackamas County. The Clackamas Soil and Water Conservation District is working with regional partners to map and catalog known infestations of knotweed to help prioritize future control efforts.
The area described is a priority area for control of knotweed in Clackamas County and we are coordinating efforts with various regional partners to control knotweed nearby.
Knotweed control will not take place until early fall, when plants are most susceptible to control efforts. So please recognize that the patch will remain untreated for much of the season.
Please feel free to contact me if you have any additional questions. Check these online resources for more information on knotweed.
http://www.skamaniacounty.org/Noxious_Weeds/TNCreport.htm
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
sleininger@conservationdistrict.org
www.conservationdistrict.org
______________________________________
Samuel Leininger
June 15, 2012, 2:41 a.m.