Foster Creek Conservation District
Foster Creek Conservation District

Biological Weed Control 2017 – order now!

We are now taking orders for the 2017 biological weed control season!


Generally, weevil insects are purchased to control the highly competitive Dalmatian toadflax, Linaria dalmatica, a noxious weed which reduces the availability of quality forage and negatively impacts the diversity of native flora and fauna species. What you may not be aware of is that there are a variety of incredible insects that can combat and control other noxious weeds found throughout Douglas County, including Canada thistle, Cirsium arvense, and diffuse knapweed, Centaurea diffusa. These researched and tested insects are a good option to fight large areas of noxious weed establishment. They are easy and safe to use, cost-effective, and reduce the use of conventional herbicides. They target a specific pest and become self-sustaining once a population is established.  It can be slow to establish a colony, but once there is a healthy population, it can provide very successful long-term effects to control a specific noxious weed. Though these insects do not eradicate a population of weeds, they will weaken and therefore control the weeds to a manageable level.


Like all pest control methods, biological weed control is best used as part of integrated weed management plan that incorporates mechanical, cultural, biological and chemical control techniques. This multifaceted approach works long-term to promote a healthy ecosystem in an economically viable manner.

Unfortunately, we are not able to offer a cost-share for 2017.  We continue to seek a reliable source of funding for this ongoing program.  New for 2017, we are offering the option of developing an individual adaptive management plan to help you install and monitor your insect population and noxious weed sites to assess the effectiveness of the insects purchased.

To place your order, to learn more about a management plan or for additional information, please contact Elizabeth Hanwacker at or (509) 888-6372.


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Foster Creek Conservation District 203 S Rainier Waterville, WA 98858 509-888-6372 © Foster Creek CD