Oregon Invasive Species Hotline

Review Report

Managed by Tania Siemens

Hotline Report: Submitted on Tuesday, September 16 2008

Category: Land Plants

Species (Confirmed): Knotweed

Remedy:

See this site for tips on how to control knotweed:

Controlling Knotweed in the Pacific Northwest

More Resources:

Want to join forces with your community to fight invasives? There are lots of people involved in this effort already! The links below can connect you with opportunities:

Association of Soil and Water Conservation Districts (Click on your county)
OPB Silent Invasion (scroll down to events)
SOLV
Invasives Watch Volunteers
The Nature Conservancy in Oregon

Severity: invasive

EDRR Status: 1. Local expert notified

Description of specimen:

Tall, green, heart-shaped leaves with white flowers.
Submitter does not have sample Originally misidentified as Land Plants:Knotweed, Japanese

Region: Multnomah

Description of area where specimen was found:

At Chapman school (where people go to watch the Vaux Swifts) I saw a huge patch of Japanese knotweed in bloom. I don't have GPS coordinates, but it's to the left of the school if you're sitting on the hillside watching the swifts. It's pretty hard to miss.

Response History

Hotline manager: Mr. Vern Holm - Monday, September 29 2008 at 3:11pm

Hi!

I have forwarded you report to Lucas Nipp, Invasive Weed Technician at the East Multnomah SWCD. He will go to the site and if he can get permission from the landowner, work out treatment plans.

Thank you very much for your report, and happy swift watching! :>)

Vern Holm

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