"T" Weeds

These weeds represent an economic threat to the state of Oregon. Please call 1-866-INVADER if you suspect you have found any of these weeds.

"A" Weeds

These are weeds of known economic importance which occur in the state in small enough infestations to make eradication/containment possible; or which are not known to occur, but their presence in neighboring states makes future occurence in Oregon seem imminent. Please call 1-866-INVADER if you suspect you have found any of these weeds.

"B" Weeds

These are weeds of economic importance which are regionally abundant, but which may have limited distribution in some counties. If you would like information on how to control these weeds, please contact your local county weed program or extension agent, or refer to the Pacific Northwest Weed Management Handbook.