Permission to Survey/Treat Form

Purple Loosestrife – Lythrum Salicaria

Noxious & Invasive Weed Control:

Invasive and noxious species are a constant threat to Oregon.  These threats outcompete native plants and animals, can be devastating to important state industries, threaten the safety of our drinking water, and limit recreational opportunities in the state.  Fortunately, there is a community of dedicated agencies, non-profit organizations and private citizens that are working to protect the state from invasive and noxious species.

Locally, the Yamhill Soil & Water Conservation District (district) is available to assist landowners with managing invasive or “noxious” weeds in Yamhill County.   Currently the District is participating in a state-wide Early Detection Rapid Response Program  (EDRR).  This program is designed to help detect new noxious/invasive species to an area and hopefully give landowners and managers time to respond with treatment and eradicate potential troublesome weeds early in their establishment before they become a wide spread concern.  In order to assist landowners in weed identification the district will be providing educational outreach for public awareness on potential noxious and invasive weed threats.  If new invaders on the EDRR list are found the district will provide free management and treatment options for landowners that are battling these target EDRR weeds.

The district is also launching a new WEED WATCH campaign to bring awareness to weeds of particular concern in Yamhill County. WEED WATCH content will include descriptive information, management and/or preventative methods, warnings or other relevant information. As the campaign grows so will the library of online content.

The district hosts an annual weed committee meeting.  The weed committee consists of landowners, district staff and board members.  One of the committee’s tasks is to create a county specific Noxious Weed List 2021-2022 in conjunction with the Oregon Department of Agriculture’s priority weed list.  The listing is categorized specific to each weed’s level of influence or growth in the county. The district refers to this list to prioritize action in response to noxious weed complaints.  Complaints directed to the district creates an opportunity to work with landowners to provide them with information on noxious weed control strategies.

If the weeds are left alone, they will win. Questions? Contact the district at 503-472-6403 and ask for a weed management specialist.

How do weeds affect us?

Invasive weeds may:

  • ​Displace native vegetation
  • Reduce crop yields
  • Harm fish and wildlife
  • Adversely affect human health
  • Damage property and infrastructure
  • Reduce forage for livestock and wildlife
  • Decrease property values
  • Increase erosion
  • Decrease water quality and quantity
  • Limit land use
  • Disrupt ecological processes

Invasive weeds are a form of biological pollution that alter landscapes.

They not only degrade the quality of our land but convert that land into new sources of biological pollution. Controlling these invasives eliminates the current infestation and prevents the establishment of additional infestations. As a result, controlling our invasive weeds is imperative to preserving the integrity of our public and private lands.

Weeds have a total impact of billions of dollars.

It has been estimated that weeds have a total direct and indirect impact of 143 billion dollars per year within the United States. Within the state of Oregon the cost associated with just the twenty-one noxious weed species costs the residents of Oregon $125 million dollars1 a year in lost agricultural production, fire damage, and control expenses. These expenses are absorbed by all of us through increased food costs, higher taxes, and decreased property values. These economic impacts clearly demonstrate the potential economic benefits associated with controlling invasive weeds.

Weeds can have a profound impact on our native ecosystem.

This occurs when weeds displace diverse native plant communities and replace them with weedy monocultures. This expansion of weed populations alters ecological processes and disrupts complex food webs which adversely affect fish and wildlife. The result is a loss in biodiversity that leaves behind a landscape that is much less productive and less resilient to changing environmental conditions. Weeds result in land that is homogenous and less like what we love about Oregon.

WHERE TO REPORT: Report weeds

If you think you’ve seen an invasive weed, please report it! The easiest way to report invaders is to visit the Oregon Invasive Species Hotline website and click the Report Now button.

2018 Noxious Weed Committee Report

*Narrative courtesy: Clackamas County Soil and Water Conservation District, 2015