Land Plants - invasive

Knotweed (unknown species) (Fallopia sp.) on Aug 24, 2009

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

Description of specimen

Typical knotweed plant with "zig-zag" stem and alternate leaves. In bloom.

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 yard of house on north side of Mapleton-Junction City Hwy. Going east from intersection of Pitny Rd. and Hwy 36, last house before intersection of Hwy 36 and Hwy 99W.

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

© 2025 Portland State University | Contact us for questions regarding site content