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Noxious Weed List for Washington State

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Noxious Weed List for Washington State Class A Weeds: Non-native species whose purple starthistle Centaurea calcitrapa houndstongue Cynoglossum officinale black henbane Hyoscyamus niger distribution in Washington is still limited. reed sweetgrass Glyceria maxima indigobush Amorpha fruticosa blackgrass Alopecurus myosuroides Preventing new infestations and eradicating ricefield bulrush Schoenoplectus mucronatus knapweed, black Centaurea nigra buffalobur Solanum rostratum existing infestations are the highest priority. sage, clary Salvia sclarea knapweed, brown Centaurea jacea cereal rye Secale cereale Eradication of all Class A plants is required by sage, Mediterranean Salvia aethiopis knapweed, diffuse Centaurea diffusa common barberry Berberis vulgaris law. shiny geranium Geranium lucidum knapweed, meadow Centaurea jacea x nigra common catsear Hypochaeris radicata Class B Weeds: Non-native species presently silverleaf nightshade Solanum elaeagnifolium knapweed, Russian Acroptilon repens common groundsel Senecio vulgaris limited to portions of the State. Species are Spanish broom Spartium junceum knapweed, spotted Centaurea stoebe common St. Johnswort Hypericum perforatum designated for control in regions where they are spurge flax Thymelaea passerina knotweed, Bohemian Polygonum x bohemicum common tansy Tanacetum vulgare not yet widespread. Preventing new infestations in Syrian beancaper Zygophyllum fabago knotweed, giant Polygonum sachalinense common teasel Dipsacus fullonum these areas is a high priority. In regions where a Class B species is already abundant, control is Texas blueweed Helianthus ciliaris knotweed, Himalayan Polygonum polystachyum curlyleaf pondweed Potamogeton crispus decided at the local level, with containment as the thistle, Italian Carduus pycnocephalus knotweed, Japanese Polygonum cuspidatum English ivy - four cultivars Hedera helix 'Baltica’, primary goal. Please contact your County thistle, milk Silybum marianum kochia Kochia scoparia only 'Pittsburgh', and 'Star'; H. Noxious Weed Control Coordinator to learn thistle, slenderflower Carduus tenuiflorus lesser celandine Ficaria verna hibernica 'Hibernica' which species are designated in your area. variable-leaf milfoil Myriophyllum heterophyllum loosestrife, garden Lysimachia vulgaris evergreen blackberry Rubus laciniatus wild four-o'clock Mirabilis nyctaginea loosestrife, purple Lythrum salicaria field bindweed Convolvulus arvensis Class C Weeds: Noxious weeds that are fragrant waterlily Nymphaea odorata typically widespread in WA or are of special loosestrife, wand Lythrum virgatum parrotfeather Myriophyllum aquaticum hairy whitetop Cardaria pubescens interest to the state’s agricultural industry. The Class B Weeds Class C status allows counties to require control if perennial pepperweed Lepidium latifolium Himalayan blackberry Rubus armeniacus locally desired. Other counties may choose to blueweed Echium vulgare poison hemlock Conium maculatum hoary cress Cardaria draba provide education or technical consultation. Brazilian elodea Egeria densa policeman’s helmet Impatiens glandulifera Japanese eelgrass Zostera japonica bugloss, annual Anchusa arvensis puncturevine Tribulus terrestris jointed goatgrass Aegilops cylindrica Class A Weeds bugloss, common Anchusa officinalis rush skeletonweed Chondrilla juncea lawnweed Soliva sessilis Eradication is required butterfly bush Buddleja davidii saltcedar Tamarix ramosissima lepyrodiclis Lepyrodiclis holosteoides Crupina vulgaris common crupina camelthorn Alhagi maurorum Scotch broom Cytisus scoparius longspine sandbur Cenchrus longispinus cordgrass, common Spartina anglica common fennel, (except Foeniculum vulgare spurge laurel Daphne laureola nonnative cattail species Typha spp. bulbing fennel) (except F. vulgare var. cordgrass, dense- Spartina densiflora spurge, leafy Euphorbia esula and hybrids flowered azoricum) spurge, myrtle Euphorbia myrsinites old man's beard Clematis vitalba cordgrass, saltmeadow Spartina patens common reed (nonnative Phragmites australis sulfur cinquefoil Potentilla recta oxeye daisy Leucanthemum vulgare cordgrass, smooth Spartina alterniflora genotypes only) tansy ragwort Senecio jacobaea perennial sowthistle Sonchus arvensis ssp. dyer’s woad Isatis tinctoria Dalmatian toadflax Linaria dalmatica ssp. thistle, musk Carduus nutans arvensis eggleaf spurge Euphorbia oblongata dalmatica thistle, plumeless Carduus acanthoides reed canarygrass Phalaris arundinacea false brome Brachypodium sylvaticum Eurasian watermilfoil Myriophyllum spicatum thistle, Scotch Onopordum acanthium Russian olive Elaeagnus angustifolia floating primrose-willow Ludwigia peploides fanwort Cabomba caroliniana velvetleaf Abutilon theophrasti scentless mayweed Matricaria perforata flowering rush Butomus umbellatus gorse Ulex europaeus water primrose Ludwigia hexapetala smoothseed alfalfa dodder Cuscuta approximata French broom Genista monspessulana grass-leaved arrowhead Sagittaria graminea white bryony Bryonia alba spikeweed Hemizonia pungens garlic mustard Alliaria petiolata hairy willowherb Epilobium hirsutum wild chervil Anthriscus sylvestris spiny cocklebur Xanthium spinosum giant hogweed Heracleum mantegazzianum hawkweed, oxtongue Picris hieracioides yellow archangel Lamiastrum galeobdolon Swainsonpea Sphaerophysa salsula goatsrue Galega officinalis hawkweed, orange Hieracium aurantiacum yellow floatingheart Nymphoides peltata thistle, bull Cirsium vulgare hydrilla Hydrilla verticillata hawkweeds: All nonnative Hieracium, subgenus thistle, Canada Cirsium arvense species and hybrids of the Pilosella yellow nutsedge Cyperus esculentus Johnsongrass Sorghum halepense tree-of-heaven Ailanthus altissima meadow subgenus yellow starthistle Centaurea solstitialis knapweed, bighead Centaurea macrocephala white cockle Silene latifolia ssp. alba hawkweeds: All nonnative Hieracium, subgenus knapweed, Vochin Centaurea nigrescens wild carrot (except where Daucus carota species and hybrids of the Hieracium Class C Weeds kudzu Pueraria montana var. lobata commercially grown) wall subgenus absinth wormwood Artemisia absinthium meadow clary Salvia pratensis yellowflag iris Iris pseudacorus herb-Robert Geranium robertianum Austrian fieldcress Rorippa austriaca oriental clematis Clematis orientalis yellow toadflax Linaria vulgaris hoary alyssum Berteroa incana babysbreath Gypsophila paniculata * New additions to the 2008 Noxious Weed List To learn more about noxious weeds and Noxious Weeds are non-native plants To help protect the State’s resources and noxious weed control in Washington 2014 introduced to Washington State that can economy, the Washington State Noxious State, please contact: be highly destructive, competitive, and Weed Control Board adopts a State Washington State difficult to control. These plants invade our Noxious Weed List each year (WAC 16- croplands, rangeland, forests, parks, 750). This list classifies weeds into three WA State Noxious Weed Control Board P.O. Box 42560 Noxious Weed List rivers, lakes, wetlands, and estuaries major classes – A, B, and C – based on Olympia, WA 98504-2560 causing both ecological and economical the stage of invasion of each species and (360) 725-5764 damage that affects us all. Noxious the seriousness of the threat they pose to Email: [email protected] weeds can: Washington State. This classification Website: http://www.nwcb.wa.gov . Lower crop yields system is designed to: Or . Reduce forage quality . Prevent small infestations from WA State Department of Agriculture expanding by eradicating them . Destroy plant and animal habitat 21 North First Avenue #103 when they are first detected Yakima, WA 98902 . Displace native plants (509) 225-2604 . Restrict already established weed populations to regions of the state Or . Reduce recreational opportunities (e.g., fishing, hunting, swimming where they occur and prevent their Your local County and hiking) movement to un-infested areas Noxious Weed Control Board . Clog waterways . Allow flexibility of weed control at the local level for weeds that are . Decrease land values already widespread. Increase erosion and wildfire risk . And some are toxic to humans and Lesser celandine (Ficaria verna) livestock a new Class B noxious weed for 2014 County Noxious Weed Control Board contact information can be found on our List arranged alphabetically by: website’s homepage by clicking on the Please help protect Washington’s COMMON NAME economy and environment box ‘County Links’. from noxious weeds! * New additions to the 2008 Noxious Weed List .
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