Early detection and rapid response (EDRR) are primary
activities of the Oregon Department of Agriculture (ODA) Noxious Weed Control
Program. Weeds are listed and targeted for early detection and rapid response
- Prevent introduction
- Prevent widespread occurrence through
- Early detection efforts
- Implementation of control measures
ODA works toward prevention through the noxious weed
quarantine and EDRR projects. Program staff use a weed risk assessment process
with the Oregon State Weed Board (OSWB) to list species on the State Noxious
Weed List. Priority listed species, "A" (highest priority) and
"T" (target) designated weeds of limited distribution in the state,
are the primary EDRR targets for ODA.
- Priority species are incorporated into presentation and
outreach activities to increase awareness.
- Pest alerts and educational materials are distributed in an
effort to find new infestations.
- Survey for early detection is conducted.
- Rapid response projects are implemented for eradication or
- Statewide management plans for “T” weeds are updated
annually to identify priorities.
ODA works with state and federal cooperators, county weed
programs, county weed management areas (CWMAs), and private landowners to
implement EDRR projects or provide assistance through OSWB grants.
Benefits of EDRR
- 34:1 benefit to cost ratio for EDRR projects.
- Annual treatments for the control of “A” and “T” designated
weeds reduce the net acreage of many large infestations of weeds.
- Distaff thistle, Carthamus lanatus, 99% control
- Purple starthistle, Centaurea calcitrapa, 99% control
- Increased weed awareness among the general public
Western US Invasive Plant EDRR Guide
Provided as a resource to Oregonians to aid in Early Detection and Rapid Response for invasive weeds in Oregon. Western US Invasive Plant EDRR Guide