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Nisqually River Knotweed Control Project Update
Renee R. MitchellPierce Conservation District
5430 66th Avenue EastPuyallup, WA 98371
(253) [email protected]
What is Knotweed?Tall, very aggressive, invasive herbaceous perennial species native to Asia Stems are thick & hollow, resembling bamboo, green to reddish in color Leaves are alternate, and bright green in color Can reach up to 15 feet in height within a single growing season Listed as a Class B non-designated noxious weed
Species:Japanese GiantBohemian (*Hybrid of Giant & Japanese)Himalayan
Why control it?Knotweed:
Displaces and Crowds out Native Riparian Vegetation Increases Erosion Reduces Seedling Recruitment of Native Trees Degrades Fish and Wildlife Habitat Alters Soil Nutrient Cycling Impacts Aquatic Food Webs
It’s Everywhere
How does knotweed spread primarily?
Root fragment sprout
Stem fragment rooted in cobble at nodes
Mineral Creek
Knotweed = Persistence
2010 Major Project Changes
*April of 2010:Nisqually Knotweed Control Project transferred from Pierce County Noxious Weed Board to the Pierce Conservation District
Pierce County
Nels Parvi
New Project Manager
Project Partners
Project Partner Collaboration
*Float surveys conducted from LaGrande Dam to Nisqually Estuary with:
Florian Leischner: Rick Johnson: Restoration Biologist Noxious Weed Control CoordinatorNisqually Tribe Thurston County
Jesse Barham: Bret Forrester:Restoration Biologist Wildlife & Recreation CoordinatorU.S. Fish & Wildlife Tacoma Power
2010 Project Funding
Project Funding for 2010 consisted of:
WSDA Grant Washington State Recreation and
Conservation Office Salmon Recovery Funding Board (SRF Board)
* In October 2010, the WSDA Grant was pulled from the Nisqually Knotweed Control Project
Education & Community Outreach2010:
Knotweed awareness was presented to the public via outreach letters, brochures, face-to-face meetings, and phone calls
Thurston County Noxious Weed Control Board provided educational brochures on knotweed control strategies during the Water Festival held at the Nisqually Wildlife Refuge
Conducted a “No Knotweed” bending party utilizing volunteers from the surrounding Ashford community
Treatment Methods
Foliar Applications = Backpack sprayers containing:1% Imazapyr (Polaris)1% Surfactant (Competitor)
Stem Injection =Injector Guns containing: 3 ml Glyphosate (Glypro)
Nisqually
Alternative Control MethodsCutting - remove stems, bag them up & take to garbageMowing - pick up every fragment, bag them up & take
to garbageDig up roots - must try and remove as much root
system as possible Cover – spread heavy duty geo-textile fabric/black
plastic
*These methods stimulate shoot growth which helps deplete energy from the roots/rhizomes
****Warning: Do not add root & stem fragments to compost/mulch piles
2010 Project Accomplishments
Lower Watershed – Surveyed 38.4 miles along the main stem
below the Alder Dam by raft, jet boat, and stream walking
Re-treated and mapped 100% of all re-sprouts and new infestations found
Float surveys were conducted in partnership with the Nisqually Tribe, Tacoma Power, Thurston County Noxious Weed Control Board, and U.S. Fish and Wildlife
2010 Lower Watershed Treatment
Manke Gate
Alder Dam
New Knotweed
2010 TacomaPower Float
Alder Lake
2010 Lower Watershed Treatment
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MankeGate
McKenna Bridge
Tank Crossing
Knotweed Bending Site
Retreat Start
GOVLand
TPUTPU
GOVLandWong
Mining & Forestry
USFS
WSDOT
USFS
City of Tacoma
TPU USFS
DNRState LandTacoma
PowerTacomaPower
WA StateForest Board
Private Land Owner
TPU
Wong M&F
GOVLand
Stevens, J.
Stevens, J.
Mt. Rainier
RaindropProp.
WongWongM&F
GOVLand
GOVLand
DNRDNRDNRWA ST
Forest Board
Tacoma PowerState of Washington
TacomaPower
DNRCity ofTacoma
City ofTacoma
DNRDNRCity ofTacomaDNRDNRWhite River
Forests LLC
DNRDNRState LandPat Garrett
WA STForest Board
WA STForest Board
Snyder, Gary& Jo AnnDNR
State LandState Land
Big CreekCatt Creek
I-5
Joint Base Lewis-McCord
New Infestations
Elbe Hills State Forest
Nisqually Tribe Floats
TacomaPowerWA State
Forest Board
PrivateLand Owner
DNRPrivateLand OwnerState LandState LandPrivateLand OwnerTacoma
Power
DNRKernahan Road2010 NewTreatment Start
2010 Project AccomplishmentsUpper Watershed – Surveyed 5.6 miles along the main stem
starting from outside the Mt. Rainier National Park entrance by stream walking
Re-treatments were made along the old Nisqually River channel, Copper Creek, spot treatments for various concerned landowners, and Gifford-Pinchot National Forest parcels
Treated 2.6 miles of new heavy knotweed infestations along the main stem of the river
2010 Upper Watershed New Areas Treated
TreStart
TPU
USFS
WSDOT
USFS
City of Tacoma
DNR
State Land
WA StateForest Board
Private Land Owner
State Land
State Land
PrivateLand Owner
DNR
PrivateLand Owner
State Land
State Land
PrivateLand Owner
Kernahan Road
2010 NewTreatment Start
2010 Upper Watershed New Areas Treated
DNR
State Land
TacomaPower
TacomaPower
WA StateForest Board
Private Land Owner
State Land
State Land
TacomaPower
PrivateLand Owner
DNR
PrivateLand Owner
State Land
State Land
PrivateLand Owner
Tacoma Power
Kernahan Road
2010 NewTreatment Start
2010 Upper Watershed End of Treatment
Knotweed Bending Site
State Land
TacomaPower
TacomaPower
WA StateForest Board
Private Land Owner
DNR
DNR
State Land
Big Creek
TacomaPower
WA State Forest Board
Tacoma Power
DNR
2010 End of Treatment
Tributaries Surveyed and TreatedUpper & Lower Watershed
Berry Creek, Mona Creek, Wildcat Creek, Little Nisqually, Powell Creek, Lacamas Creek, Muck Creek, South Muck Creek, Horn Creek, Unnamed tributary to Harts Lake, Rocky Slough, and Tule Lake
Total = 34 miles by stream walking and road surveys
The Grand total: 78 total miles of river & creeks surveyed47 private & public-owned parcels surveyed and treated180 acres of knotweed infestations treated
* Treatment estimated at a 90% mortality rate
Knotweed Treatment as of 2010
Rare Finds Along the Nisqually Floodplains
Western Toad (Bufo boreas) Wooden Buffalo Carving* Species of concern in WA & OR
Plan for 2011Ensure the lower main stem of the Nisqually remains knotweed free by survey, monitoring and re-treating where necessary Continue annual main stem rafting floats with project partners Continue survey, retreatment , and treatment of new areas within the upper watershed Increase Knotweed awareness among private landowners through knotweed workshops and community meetings Continue to request land owners cooperation in the project Identify areas to replace native vegetation that has been negatively impacted by the presence of knotweed
2011 Treatment Goal
Knotweed Bending Site
WSDOT
USFS
City of Tacoma
DNR
State Land
TacomaPower
WA StateForest Board
Private Land Owner
DNR
DNR
DNR
Tacoma Power
State of Washington
TacomaPower DNR
City ofTacoma
City ofTacoma
DNRDNR
City ofTacoma
White River Forests LLC
DNR
DNR
State LandPat Garrett
State Land
State Land
Big Creek
Catt Creek
WA State Forest Board
PrivateLand Owner
DNR
PrivateLand Owner
State Land
State Land
PrivateLand Owner
Tacoma Power
DNR
Kernahan Road
2010 NewTreatment Start
2010 End ofTreatment
2011 end ofTreatment Goal ?
1220187467351
12202304674261220337467429
12
20
118
46
73
70
Project Needs Additional Funding Sources More knotweed technicians Stronger partner collaboration efforts Cooperation from more private landowners
Help!!!!!!!!.........Questions……….