Invasive Weeds Program
Invasive weeds significantly impact landowners around West Multnomah County and throughout Oregon. Noxious weeds impact watersheds by displacing native and desirable plants and wildlife habitat. They also negatively affect timber production and the agriculture industry. Working with landowners to remove and control invasive weeds is a top priority of the West Multnomah Soil & Water Conservation District (WMSWCD) and a comprehensive plan has been developed to deal with this imporatant natural resource issue.
The plan uses the following method to implement program goals:
- Inventory
- Assesement
- Coordination
- Education & Outreach
 |
| English Ivy strangling trees |
- Control
- Restoration
The District Invasive Weed Program has four main focus areas that help direct program efforts:
- Multnomah Weed Watchers (Early Detection and Rapid Response Program)
- Strategic Partnerships
- Educational Demonstration Projects
- English Ivy in Forest Park
- Wildlife Corridor & Declining Habitat Focus
To find out more please see the Invasive Plant Species Strategic Work Plan (5 year plan)
Multnomah Weed Watchers
Early Detection & Rapid Response (EDRR)
EDRR aims to prevent the introduction of invasive species by promoting prevention methods such as cleaning your boots and bike tires to checking the spread of a new garden plant. If prevention wasn't possible, the most time and cost-effective way to manage new invasive plants is through Early Detection and Rapid Response (EDRR) efforts. They include detecting early weed infestations while their populations are still small, and then rapidly implimenting control measures. These efforts greatly increase the likelihood that new invasions will not become established and widespread. The cost involved with catching weeds before they gain a foothold are drastically less than those of long-term invasive species management.
This program is a county-wide partnership that includes the East Multnomah Soil and Water Conservation District and the City of Portland Bureau of Environmental Services (BES). The partnership ensures EDRR support through all of Multnomah County.
Please see our current EDRR Watch List. For detailed descriptions of the weeds, click here.
To see our Weed Watchers EDRR ID Guide, click on the links below:
Click here to view a brochure of EDRR weeds.
Click here to watch a presentation on EDRR weeds and Weed Watchers!
Become a Weed Watcher!
The EDRR program can only be successful with your help. The more eyes on the ground, the better chance we have of keeping new invaders out of the county. To become a Multnomah Weed Watcher please attend one of our trainings or contact us if you would like us to train your group.
Have you spotted an EDRR Invasive Weed?
Report here any sightings in Multnomah County. To reach the City of Portland EDRR specialist, call Mitch Bixby at 503-823-2989. To contact the East Multnomah SWCD specialist, call Lucas Nipp at 503-935-5363.
In West Multnomah County or on Sauvie Island: REPORT NOW or call Mary Logalbo at 503-238-4775, ext. 103.
Strategic Partnerships
These partnerships help us achieve our invasive weed control goals throughout the District:
The Multnomah Weed Watchers
West Willamette Restoration Partners
4 County Cooperative Weed Management Area (CWMA)
On-the-Ground Weed Control Efforts
Garlic Mustard Control
WMSWCD seeks to identify and treat invasive garlic mustard in unincorporated west Multnomah County. The City of Portland may be contacted (Mitch Bixby at 503-823-2989) for sightings in west Multnomah County inside city boundaries.
If you find any patches of garlic mustard on your property or elsewhere, or if you need assistance identifying or treating this invasive weed, please contact Urban Conservationist, Mary Logalbo; mary (at) wmswcd.org or 503.238.4775 x103.
If you know you have Garlic Mustard and would like our help please send in this Permit of Entry and Treatment Form.
Garlic Mustard Information
Invasive species harms hardwoods by killing soil fungus
Plant Conservation Alliance Fact Sheet
Garlic Mustard, Invasion Biology Introduced Summary Project, Columbia University
Alliaria petiolata, Element Stewardship Abstract, The Nature Conservancy
The Nature Conservancy Alert
Images from a google search
Garlic Mustard Cook Book (from Pest to Pesto)
ODA Weed Profile
King County, Washington Garlic Mustard control
McCarthy Creek Knotweed Control Program
McCarthy Creek is one of the worst knotweed infested creeks in our District. WMSWCD was contacted by landowners concerned that this extremely invasive plant might clog the creek and take over riparian forest zones. In response, the District is on its second year of treating knotweed throughout the watershed. The project is possible, in part, due to an Oregon Department of Agriculture Oregon State Weed Board Grant. WMSWCD is seeking the assistance and cooperation of landowners to help locate patches of Japanese knotweed, and to grant permission for contracted services to treat it in or near McCarthy Creek. For more information about this project, contact Mary Logalbo at 503-238-4775 x103. If you live on McCarthy Creek and would like help from the District please fill out the following Permission to Access and Treat form.
Japanese Knotweed Information
Plant Conservation Alliance Fact Sheet
Japanese Knotweed Alliance
Polygonum cuspidatum, Element Stewardship Abstract, The Nature Conservancy
Japanese Knotweed identification and recipes
Japanese Knotweed Video
Images from a google search
Draft Knotweed Control Recommendation Sheet from Clallam County
Balch Creek Restoration Demonstration Project
The District has lead a reinvigoration of partner agencies and landowners throughout the highly valued Balch Creek Watershed. It contains over 120 plant species and over 70 resident and migrant wildlife species, including native Cutthroat Trout. Currently, WMSWCD is working on 10 acres of land with voluntary landowners on a demonstration restoration project in the headwaters of Balch Creek. To find out more or contact us.
Please take a moment to review the Balch Creek Declaration of Cooperation to find out more about the project and our program partners.
Multnomah Channel Habitat Connection
The District has recently started large-scale (over 60 acres) watershed restoration work with landowners in the Miller & Ennis Creek Watersheds. City of Portland studies found native runs of federally listed ESA anadromous salmonid species using Miller Creek for habitat and possibly rearing/breeding grounds. In addition, these interconnected private forestlands, adjacent to public open space managed by the City of Portland and Metro, provide contiguous habitat for a variety of wildlife that use the Tualatin Mountains (West Hills). They include extensive varieties of birds, mammals, and amphibian species.
Boones Ferry Crossing Restoration Project
In the Tryon Creek Watershed, WMSWCD is working with the Tryon Creek Watershed Council and the City of Portland Revegitation Crews on a major invasive species removal and native plant restoration project with a fantastic group of voluntary landowners.
Neighborhood Weed Pulls
WMSWCD provides technical and financial support to neighborhood weed pulls throughout our District. Contact us if you would like some help.
Resources
Please visit our Resources page for more information on the invasives listed above and others including English ivy.
|
Dig clematis and pull all vines, including those running along or just under the ground. Roots must be broken off or cut off at least 2-inches under the ground. Vines on trees can be cut with shears at both knee and chest-height to avoid re-growth. Bag cut and pulled pieces to avoid re-sprouting. Expect to dig and cut up to 5+ times before eradicated.
Cut or pull by hand, focusing on tree ivy as first priority. Cut tree ivy at both knee and chest height, and leave to die. Pull back ivy within 6ft of tree base. Ground ivy can be rolled up into "logs" and left in piles to compost. Turn pile occasionally to prevent re-sprouts. Expect to cut and pull more than once.
Pull plant before it goes to seed (around late May), careful to grab at base of plant to remove entire root. Pulled plants must be bagged to prevent re-sprouting, since the plant can continue to germinate seeds after being pulled.
Total Design Shop