-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Hi Katherine Bravo-Aguayo,

An expert has logged activity on question #0197583

From:	Kiana Ringuette
Title:

Hi Katherine, I've assigned this in case you have any insight or local resources to connect this person to. If not, please just refer them to: 

The Oregon Invasives Hotline (invasive species identification and solutions):

https://oregoninvasiveshotline.org/

If you don't have access to the internet, they can also be reached by phone at 1-866-INVADER.

---

To view/respond to the question, please login to the question system

Please join the Ask Extension Experts group in Connect Extension. We will use that group to post updates about Ask Extension.
This message was sent by Ask Extension. If you need help, please visit https://askhelp.extension.org/.

Greetings Katherine,

It certainly looks like Japanese knotweed in your photo. And even if it is another variety of knotweed, the process for management and elimination is the same.

You can find a great OSU Extension guide for managing knotweed here:

https://solvepestproblems.oregonstate.edu/weeds/knotweeds

As you will see, removal of the plants by digging them out, grazing (goats), or selective chemical control (e.g., glyphosate, the active ingredient in Roundup) is the only way to get rid of them. Even with those measures, it will take several years of close monitoring and persistent removal to eliminate the knotweeds from your yard.

For highly invasive plants like knotweed, we recommend reporting it to the Oregon Invasives Hotline:

https://oregoninvasiveshotline.org/

They can also be reached by phone at 1-866-INVADER. They have additional helpful information and resources for eliminating invasive species.

Happy gardening,