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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