Land Plants - invasive

Knotweed (unknown species) (Fallopia sp.) on Sep 7, 2009

Originally reported as Giant Knotweed (Fallopia sachalinense)

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

Description of specimen

Several 3-4 ft. tall clumps of knotweed in bloom. Typical knotweed alternate leaf pattern and "zig-zag" stems. Plants kind of scruffy looking and yellow-green in color.

Commentary

None

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 vacant lot and along RR yard northeast side of Bethel Dr. about mid-way between intersections of Wood Ave. & Bethel Dr. and Edison St. & Bethel Dr.

Expert Reviewer

Tania Siemens
WISE Program Coordinator (Watershed and Invasive Species Education)
Oregon Sea Grant Extension
Oregon State University
tania.siemens@oregonstate.edu
541-914-0701

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