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Marion Soil & Water Conservation District

Invasive Plants

Invasive plant species, or weeds, are making significant negative impacts to landowners throughout Marion County and beyond. Invasive plant species are impacting water quality in important watersheds, disturbing ecosystems by displacing native and other desirable plants and negatively affecting timber production, the agricultural industry, and the economy. This page contains information on plants that currently affect, or have the potential to affect lands in Marion County. This list includes 21 plant species that are on the Marion County Weed List, and 15 additional species that are known to cause problems in the area. Click on the weed image to view additional photos, characteristics and control measures related to the weed.

Invasive Plants

Marion County Weed List

Educate and Control

Immediate Action/Eradicate

Oregon Department of Agriculture List

Other Problem Weeds

Disclaimer

The information contained in these weed pages is meant as a basic summary of guidelines for control of invasive weeds. It is most effective to use multiple modes of control in an integrated vegetation management strategy. When using herbicides always follow the label for the product being used, wear proper safety gear, and avoid herbicide drift. Make sure to follow all local, state and federal regulations that apply to the particular project site. If in doubt as to control practices, consult a licensed treatment contractor. Please refer to the PNW Weed Management Handbook for specific herbicide recommendations. Always make sure that the benefits of the activity outweigh the impacts.