Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Jun 4, 2013

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

Description of specimen

No description provided

Commentary

Thanks, Nick. We've been trying to get a handle on the knotweed along that stretch, but evidently missed some. I'll talk with the owners (either Parks or Metro) and see what can be done. Feel free to reach me directly at mitch.bixby@portlandoregon.gov.


-Mitch

Mitch Bixby
June 5, 2013, 5:41 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

Start where Maplecrest Dr. bisects Marshall Park. Head SE on trail until you come to Tryon Creek. The trail crosses the creek by means of a large fallen cedar log. Immediately before crossing creek, walk about 50 feet along Tryon Creek streambed (in generally northerly direction). About 50-100feet N of where trail/log crosses Tryon Creek there is a large black cottonwood tree. At the base of the tree on the bank of Tryon Creek is a small population of Japanese knotweed.

Expert Reviewer

Mr. Mitch Bixby
City of Portland - Bureau of Environmental Services (BES)

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