Land Plants - invasive

Knotweed (unknown species) (Fallopia sp.) on Jan 7, 2014

Originally reported as Japanese Knotweed (Fallopia japonica)

Submitter has sample

Description of specimen

I worked for the South Santiam Watershed Council Stream Surveyor. Part of my job was to identify and log GPS locations of invasive species. I know what Japanese Knotweed looks like and that is what this is. Please let me know how soon it can be taken care of because I only found it at the end of last summer, but I don't know how long it's been there and how much it has spread.

Commentary

My brother and me would like to become certified to spray invasive species because we float and walk the local streams such as Crabtree and Thomas Creek frequently. What would it take to do that?

Reporter
Jan. 7, 2014, 11:32 a.m.

Remedy

Knotweed Shrub Complex: Identification, Biology, and Management, Oregon Extension Service

Location

The affected area is approximately 30 feet along the creek bank and 15 feet up the creek bank on the right side of South Fork Neal Creek. I have walked from the confluence of Bilyeu Creek and Thomas and up South Fork Neal Creek (otherwise known as Birmester Creek) and to the bridge at Zurfluh Road. I have only found it in this one location so far. The landowners are soon to be family-in-laws and would be cooperative in eradicating the Japanese Knotweed. This is good early detection before it spreads any further. I am not sure how it got there in the first place, but I hope there is not any of it upstream. However, the possibility should be investigated.

Expert Reviewer

Mr. Vern Holm
Director, Oregon Vegetation Management Association

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