Land Plants - invasive

Knotweed (unknown species) (Fallopia sp.) on Oct 11, 2010

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

Description of specimen

small patches are spreading throughout parking lot due to mowing practices. this is adjacent to the proposed Kellogg-for-Coho Kellogg dam removal project area.

Commentary

Jeff,

Thanks for reporting this patch of knotweed patch. We definitely should try to combat this patch, if it is going to be impacted by the Dam removal process. I am planning some outreach with the City of Milwaukie and will use that as a venue to discuss improved management of Japanese knotweed.

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
Dec. 21, 2010, 5:09 a.m.

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

In a vacated parking lot at the corner of 99E and Washington St. in downtown Milwaukie. The property is owned by the city of Milwaukie and is not managed as part of Dogwood Park. This patch is a satellite patch (spread due to mowing) of a larger patch on Kellogg lake just south of the parking lot.

Expert Reviewer

Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area

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