Noxious Weeds are Obnoxious

Any­one who owns or man­ages land in the north San­tiam Water­shed already knows how totally obnox­ious some plants can be.  I mean, they just don’t get it, do they?  You keep pulling, or dig­ging or spray­ing and like a bad penny they just keep turn­ing up.  Some­times it seems almost hopeless.

Nox­ious weeds are obnox­ious, that’s why the North San­tiam Water­shed Coun­cil has your back.  We can help indi­vid­ual pri­vate land own­ers  iden­tify weed species and through our part­ner­ships with state, local, and fed­eral agen­cies we can find resources to help when you decide to treat those nox­ious weeds on your property.

Yel­low Flag Iris is an inva­sive weed that chokes out native species.

OK, so what do we mean by NOXIOUS WEEDS?

Nox­ious weeds are non-native plants that have been des­ig­nated seri­ous pests because they cause eco­nomic loss and harm to human com­mu­ni­ties and nat­ural environments.

OR Dept. of Agri­cul­ture Nox­ious Weed Strate­gic Plan

There are 118 plant species on Oregon’s Weed List.  Accord­ing to the Ore­gon Depart­ment of Agri­cul­ture, invad­ing plant species are con­sid­ered nox­ious when they:

  • cause severe loss of agri­cul­tural or hor­ti­cul­tural  pro­duc­tion losses
  • are dif­fi­cult or costly to con­trol using cur­rent man­age­ment practices
  • endan­ger native flora and fauna by  encroach­ing on for­est, range, and con­ser­va­tion areas
  • ham­per the use and enjoy­ment of recre­ational areas
  • are poi­so­nous, inju­ri­ous, or oth­er­wise harm­ful to humans and/or animals.

Exam­ples of the North San­tiam Water­shed Council’s Weed Con­trol Projects

  • We’ve inven­to­ried nox­ious weeds on approx­i­mately 1,000 landowner sites along North San­tiam and its tributaries.
  • We’ve helped 65 landown­ers treat inva­sive weeds on their sites and we’ve treated
  • 30 acres False Brome on North San­tiam River,
  • 4 acres of Japan­ese Knotweed on Stout Creek, and
  • 50 prop­er­ties along the North San­tiam to con­trol  Yel­low Flag Iris, Meadow Knap­weed, Knotweeds and Tansy Ragwort

The Coun­cil is part­ner­ing with landown­ers and the US For­est Ser­vice to con­tinue inven­tory and treat­ment of nox­ious weeds in the Detroit and Idanha area.

For more infor­ma­tion or help with your weed con­trol issues, please con­tact our office, or

Mar­ion County Pub­lic Works – Weed Con­trol District 

Ore­gon Depart­ment of Agri­cul­ture – Nox­ious Weed Control

Image credit: cour­tesy of Jef­fer­son County Weed Control

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