Methods of Control

The Noxious Weed Control Program uses Integrated Pest Management (IPM) throughout Skamania County.  IPM takes into account all the factors affecting control efforts like patch size and density or what type of soil or terrain on which the infestation exists.  When developing a management plan, consider using IPM in order to increase your effectiveness and decrease your cost.  IPM includes multiple control methods like biological, cultural, manual/mechanical, and chemical control techniques.  Best Management Practices for certain weeds can be found here

Biological Control

Biological control methods include grazing, insect feeding and the use of pathogens to manage weed infestations. Generally, these methods are used for long-term control, rather than short-term control or complete eradication.

To learn more about biocontrol agents such as mecinus janthinus, go to WSU-Extension’s Integrated Weed Control Program webpage, who provides biocontrol support for Skamania County.

Chemical Control

This method consists of the careful use of herbicides, administered by a licensed applicator. Chemicals can be selective (targeted at a specific weed population; not harmful to other vegetation) or non-selective (resulting in a complete eradication). Chemical control is expensive, and is best used on smaller, emerging weed infestations.

Safety is essential when using chemicals. If you are considering using chemicals to control your weed infestation, read through WSU's "Understanding the Pesticide Label" overview to be sure all of your chemical application questions are answered.

Cultural Control

Cultural control methods can be applied to reduce the suitability of the soil for weed growth. Some of the components of cultural control include applying fertilizer to encourage wanted vegetation, increasing the canopy cover, and revegetation of an infested area.

Mechanical Control

This method is often the most time and labor intensive. Various forms of mechanical control include hand pulling or cutting, tilling, mowing or weedeating, and burning. While there are definitely some advantages to controlling your weeds mechanically (material-wise, this is the least expensive method, and it can still be used by those landowners who can't or prefer not to use chemicals) some of the disadvantages become obvious, especially when a landowner is faced with large tracts of weed-infested land.

Our office maintains a list of local contractors who can provide mowing, reforestation, landscaping, and herbicide application to interested landowners for their private land. If you would be interested in learning more about private weed control in Skamania County or would like help with developing a management plan, please contact us any time.  

Contact us

Office Hours:            6:30 - 4:30 Monday to Thursday

Office Location:      704 Rock Creek Drive Stevenson, WA 98648

Mailing Address:        PO Box 369   Stevenson, WA 98648

Phone: (509) 427-3941 Email: Weeds

Learn more

Noxious weeds: FAQ

Get help and participate

Noxious weed list and laws

Weed Prevention

Methods of control


Toxic Plants








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