Please help me control this weed. I hand dig it to remove the root but it breaks in the ground and it keeps growing more and more. Is there a better way to control this weed. I have not used any chemical for this.
Multnomah County Oregon weed id
Thanks for your question. Your mystery plant appears to be a horsetail plant or field horsetail plant (equisetum arvense.) Good luck getting rid of it. It is a survivor of the dinosaur era. (No kidding!)
Here is a link to an Extension article about the plant and its control.
I hope this is helpful (as much as it can be)! Good luck!