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Which
Weeds-Where?
Noxious Weeds
in Thurston County - Map (PDF Updated
12/01/09)
This map depicts known noxious weeds sites within Thurston County.
Use this map to see which species are in your neighborhood.
 Known
Spurge Laurel infestation sites in Thurston County-Map
(PDF Updated 2/16/10)
Maps are complex and fairly
large in size, depending on your connection speed, it may
require a generous and patient download time. Maps are in Adobe Acrobat format,
Acrobat
Viewer is required to view.
Thurston County Noxious Weed Control is
monitoring for 37
species of noxious weeds which are targeted for control
out of a list of 86 designated by the State of Washington.
The remaining 50 species have not yet been found in Thurston
County, but are targeted annually through early detection
surveys. All species of noxious weeds are non-native.
Noxious weeds threaten public health, the
environment, wildlife habitat, native plants, agriculture areas,
and recreational areas. A risk assessment is used in prioritizing the weed list. To view our
rationale, go
to the
Risk Assessment
Chart. To see photographs of those species
designated for control in Thurston
County, go to the
Noxious
Weed List .
Agency staff are surveying for the
remaining 50 species
not yet known to exist in Thurston County. This preventative
effort to find species while they are limited,
prevents them from becoming widespread. Prevention is the most
effective control strategy .
The weed program is
focused on weeds of limited distribution where there is a possibility
of eradication and preventing or reducing populations of noxious
weeds to levels where impacts or injuries are low.
The following problem weeds are found in
Thurston County. These species are a problem because of their
invasive nature, but are not listed for control due to
population densities so high that eradication is not possible:
Brazilian
elodea (Egeria Densa),
Canada thistle
(Cirsium
arvense),
Eurasian
Watermilfoil,
Scotch
broom (Cytisus scoparius),
English
Ivy,
Policeman's
Helmet
(Impatiens glandulifera), and
Yellow
Flag Iris (Iris psuedacorus).
Address
questions or comments to: tcweeds@co.thurston.wa.us
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