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Noxious Weed List

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Noxious Weed List Class A Weeds: Non-native species whose silverleaf nightshade Solanum elaeagnifolium ►knapweed, spotted Centaurea stoebe common catsear Hypochaeris radicata Washington distribution is still limited. Eradication ■small-flowered Impatiens parviflora ■►knotweed, Bohemian Polygonum x bohemicum common groundsel Senecio vulgaris and prevention are the highest priorities. jewelweed ►knotweed, giant Polygonum sachalinense common St. Johnswort Hypericum perforatum Eradication of all Class A plants is required by law. Spanish broom Spartium junceum ►knotweed, Himalayan Polygonum polystachyum ►common tansy Tanacetum vulgare Class B Weeds: Non-native species presently Syrian beancaper Zygophyllum fabago ►knotweed, Japanese Polygonum cuspidatum ►common teasel Dipsacus fullonum limited to portions of the State. Species are Texas blueweed Helianthus ciliaris ►kochia Kochia scoparia curlyleaf pondweed Potamogeton crispus designated for control in regions where they are not thistle, Italian Carduus pycnocephalus ►lesser celandine Ficaria verna English hawthorn Crataegus monogyna yet widespread. Preventing new infestations in thistle, milk Silybum marianum ►loosestrife, garden Lysimachia vulgaris ►English and Irish ivy - Hedera helix 'Baltica’, these areas is a high priority. In regions where a thistle, slenderflower Carduus tenuiflorus ► four cultivars only 'Pittsburgh', & 'Star'; H. Class B species is already abundant, control is loosestrife, purple Lythrum salicaria decided locally, with containment the primary goal. variable-leaf milfoil Myriophyllum heterophyllum ►loosestrife, wand Lythrum virgatum hibernica 'Hibernica' wild four-o'clock Mirabilis nyctaginea ■► Malta starthistle Centaurea melitensis ■ Eurasian watermilfoil Myriophyllum spicatum x M. Class C Weeds: Noxious weeds that are Class B Noxious Weeds ►parrotfeather Myriophyllum aquaticum hybrid sibiricum typically widespread in WA or of special interest to evergreen blackberry Rubus laciniatus state agriculture. Class C status allows counties to ►blueweed Echium vulgare ►perennial pepperweed Lepidium latifolium field bindweed Convolvulus arvensis require control if locally desired, or choose to ►Brazilian elodea Egeria densa ►poison hemlock Conium maculatum fragrant waterlily Nymphaea odorata educate or provide technical consultation instead. ► ►policeman’s helmet Impatiens glandulifera bugloss, annual Anchusa arvensis hairy whitetop Lepidium appelianum ■ Newly listed or change in designation ►bugloss, common Anchusa officinalis ►puncturevine Tribulus terrestris Himalayan blackberry Rubus armeniacus Yellow significant in San Juan County ■ butterflybush Buddleja davidii Ravenna grass Saccharum ravennae ► Control or containment required ►rush skeletonweed Chondrilla juncea ►hoary cress Lepidium draba ►camelthorn Alhagi maurorum Italian arum Arum italicum Class A Noxious Weeds ►common fennel (except Foeniculum vulgare (except F. ►saltcedar Tamarix ramosissima ► Japanese eelgrass Zostera japonica Eradication required bulbing fennel) vulgare var. azoricum) Scotch broom Cytisus scoparius common crupina Crupina vulgaris ►common reed (nonnative Phragmites australis ► shiny geranium Geranium lucidum jointed goatgrass Aegilops cylindrica cordgrass, common Spartina anglica genotypes only) ■► spurge flax Thymelaea passerina jubata grass Cortaderia jubata cordgrass, dense- Spartina densiflora ►Dalmatian toadflax Linaria dalmatica ssp. ►spurge laurel Daphne laureola lawnweed Soliva sessilis flowered dalmatica ►spurge, leafy Euphorbia esula longspine sandbur Cenchrus longispinus cordgrass, saltmeadow Spartina patens ►Eurasian watermilfoil Myriophyllum spicatum spurge, myrtle Euphorbia myrsinites medusahead Taeniatherum caput-medusae cordgrass, smooth Spartina alterniflora ■► European coltsfoot Tussilago farfara ►sulfur cinquefoil Potentilla recta nonnative cattail species Typha spp. dyer’s woad Isatis tinctoria ►fanwort Cabomba caroliniana ►tansy ragwort Senecio jacobaea and hybrids eggleaf spurge Euphorbia oblongata ►gorse Ulex europaeus ►thistle, musk Carduus nutans old man's beard Clematis vitalba false-brome Brachypodium sylvaticum ►grass-leaved arrowhead Sagittaria graminea ►thistle, plumeless Carduus acanthoides oxeye daisy Leucanthemum vulgare floating primrose-willow Ludwigia peploides ►hairy willowherb Epilobium hirsutum ►thistle, Scotch Onopordum acanthium pampas grass Cortaderia selloana ■► flowering rush Butomus umbellatus ►hawkweed, oxtongue Picris hieracioides ►velvetleaf Abutilon theophrasti perennial sowthistle Sonchus arvensis ssp.arvensis French broom Genista monspessulana ►hawkweed, orange Hieracium aurantiacum ►water primrose Ludwigia hexapetala reed canarygrass Phalaris arundinacea garlic mustard Alliaria petiolata ►hawkweeds, meadow Hieracium, subgenus Pilosella ►white bryony Bryonia alba Russian olive Elaeagnus angustifolia giant hogweed Heracleum mantegazzianum subgenus: all nonnative ►wild chervil Anthriscus sylvestris scentless mayweed Matricaria perforata species and hybrids goatsrue Galega officinalis ►yellow archangel Lamiastrum galeobdolon smoothseed alfalfa dodder Cuscuta approximata ►hawkweeds, wall Hieracium, subgenus hydrilla Hydrilla verticillata ►yellow floatingheart Nymphoides peltata spikeweed Centromadia pungens subgenus: all nonnative Hieracium Johnsongrass Sorghum halepense ►yellow nutsedge Cyperus esculentus spiny cocklebur Xanthium spinosum species and hybrids knapweed, bighead Centaurea macrocephala ►yellow starthistle Centaurea solstitialis ■ spotted jewelweed Impatiens capensis herb-Robert Geranium robertianum knapweed, Vochin Centaurea nigrescens Class C Noxious Weeds Swainsonpea Sphaerophysa salsula ►hoary alyssum Berteroa incana kudzu Pueraria montana var. lobata absinth wormwood Artemisia absinthium thistle, bull Cirsium vulgare ►houndstongue Cynoglossum officinale meadow clary Salvia pratensis Austrian fieldcress Rorippa austriaca thistle, Canada Cirsium arvense ►indigobush Amorpha fruticosa oriental clematis Clematis orientalis babysbreath Gypsophila paniculata tree-of-heaven Ailanthus altissima ►knapweed, black Centaurea nigra purple starthistle Centaurea calcitrapa black henbane Hyoscyamus niger ventenata Ventenata dubia ►knapweed, brown Centaurea jacea reed sweetgrass Glyceria maxima blackgrass Alopecurus myosuroides white cockle Silene latifolia ssp. alba ►knapweed, diffuse Centaurea diffusa wild carrot Daucus carota ricefield bulrush Schoenoplectus mucronatus ►buffalobur Solanum rostratum ►knapweed, meadow Centaurea x moncktonii sage, clary Salvia sclarea cereal rye Secale cereal yellowflag iris Iris pseudacorus ►knapweed, Russian Acroptilon repens sage, Mediterranean Salvia aethiopis common barberry Berberis vulgaris yellow toadflax Linaria vulgaris * New additions to the 2008 Noxious Weed List Noxious Weeds are non-native plants Unregulated Plants of Concern in San 2018 introduced to Washington State that can be Juan County: highly destructive, competitive, and difficult To learn more about noxious weeds and to control. These plants invade our English holly Ilex aquifolium noxious weed control in Washington Washington State croplands, rangeland, forests, parks, Non-native Lupine Lupinus spp. State, please contact: rivers, lakes, wetlands and estuaries, Bur Chervil Anthriscus caucalis & San Juan County causing both ecological and economic English Laurel Prunus laurocerasus damage that affects us all. Noxious weeds Caper Spurge Euphorbia lathyris San Juan County Noxious Noxious Weed List can: Periwinkle Vinca minor,V. major Weed Control Program . Lower crop yields Dog Fennel Anthemis cotula (360) 376-3499 . Reduce forage quality Non-native Peavines Lathyrus sylvestris, 62 Henry Road #26 . Destroy plant and animal habitat L. latifolius Eastsound, WA 98245 . Displace native plants Cotoneaster spp. Cotoneaster , spp. Reduce recreational opportunities Garden Helleborine Epipactis helleborine [email protected] (e.g., fishing, hunting, swimming [email protected] Please help protect Washington’s and hiking) http://extension.wsu.edu/sanjuan/noxious/ economy and environment . Clog waterways from noxious weeds! Or . Decrease land values To help protect the State’s resources and . Increase erosion and wildfire risk WA State Noxious Weed Control Board . Inflict toxic reactions in humans, economy, the Washington State Noxious P.O. Box 42560 livestock and pets Weed Control Board adopts a State Olympia, WA 98504-2560 Noxious Weed List each year (WAC 16- (360)-725-5764 750). This list classifies weeds into three Email: [email protected] major classes (A, B, and C) based on the Website: http://www.nwcb.wa.gov stage of invasion of each species and the seriousness of the threat they pose to Or Washington State. This classification Photo Credit: Rich Lee system is designed to: WA State Department of Agriculture 21 North First Avenue #103 . Prevent small infestations from Yakima, WA 98902 Yellow Flag Iris expanding by eradicating them (509) 225-2604 when they are first detected Iris pseudacorus . Restrict already established weed Class C populations to regions of the state where they occur and prevent their Control Recommended Hoary Cress movement to un-infested areas List arranged alphabetically by (Lepidium draba) . Allow flexibility of weed control at Class C Noxious Weed Selected for Control the local level for weeds that are COMMON NAME Photo: San Juan County Noxious Weed Program already widespread. * New additions to the 2008 Noxious Weed List .
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