WHAT ARE NOXIOUS WEEDS? WHICH WEEDS SHOULD BE CONTROLLED? Noxious weeds are non-native that are highly To help protect the State’s resources and economy, To learn more about noxious weeds and noxious destructive, competitive, and difficult to control. the Washington State Noxious Weed Control Board weed control in Island County, please contact: 2021 They can reduce crop yields, destroy native and adopts a state noxious weed list each year (WAC 16- animal habitat, damage recreational areas, clog 750) that categorizes weeds as Class A,B, or C based ISLAND COUNTY waterways, lower land values, and poison humans on distribution in the state, abundance, and level of and livestock. threat (how dangerous the plant is to humans, ani- NOXIOUS WEED LIST mals, private and public lands, and native habitats). (arranged alphabetically by common name) Island County Noxious Weed WHERE DO THEY COME FROM? Each county weed board then passes a county Control Board People have introduced non-native species both weed list that specifies which weeds landowners are intentionally, such as in gardens or for erosion required to control in that county. The county list in- P.O. Box 5000 control, or accidentally, such as in contaminated cludes at minimum all Class A weeds and those Class Coupeville, WA 98239 mixes, hay, aquarium plants, or other materials. A B and C weeds that landowners are required to (360)-678-7992 small number of these introduced species have control in that county, and sometimes additional turned out to be highly invasive and damaging. weeds that are recommended for control. Seth Luginbill: Program Coordinator Noxious weeds now occur in all parts of Island Email: [email protected] County. Weeds of Concern The following plant species are not listed as noxious Website: WHAT ARE THE COSTS OF NOXIOUS WEEDS? weeds under state law and property owners are not required to control them. however, the island county http:// https://www.islandcountywa.gov/Health/ Each year, these plants cost Washington State Noxious Weed control board recognizes these non- DNR/Noxious-Weed/Pages/Home.aspx millions of dollars in lost agricultural production, environmental degradation, and maintenance costs. native plants as invasive, recommends control or Once invasive plants become established, it is very containment of existing populations, and discourages For additional information about noxious weed expensive to eradicate them. In natural areas, it may new plantings. control in Washington state, contact not even be feasible to remove them once they Common Name Scientific Name take hold. English Holly Ilex aquilfolium WA State Noxious Weed Control Board Yellow Bush Lupine Lupinus arboreus P.O. Box 42560 WHAT IS THE NOXIOUS WEED LAW? Olympia, WA 98504-2560 Bull thistle Washington’s noxious weed law (RCW 17.10) (360)-725-5764 requires landowners - including city, county and Cirsium vulgare state land agencies - to control or eradicate certain Email: [email protected] noxious weeds that occur on their property. The Website: county noxious weed program is available to provide Class C Regulated Weed in Island County information on identification and control methods. http://www.nwcb.wa.gov Landowners can choose the control method they feel is most appropriate for their property. The control of Noxious weeds affect everyone. Weeds do not obey property lines and jurisdictional boundaries. It takes noxious weeds is a coordinated effort to prevent new noxious weeds from establishing and to control and eradicate the weeds already here. The noxious weed law provides a community effort Scotch broom , Cytisus scoparius, a a way to effectively stop the spread of the new and class B non-regulated noxious weed in Island most damaging weeds. County REGULATED CLASS B WEEDS (continued) NON-REGULATED NOXIOUS WEEDS (continued) 2021 Regulated Class B Weeds Common Name Scientific Name Common Name Scientific Name Class policeman’s helmet Impatiens glandulifera common St. Johnwort Hypericum perforatum C Class B noxious weeds are regulated in counties where they are puncturevine Tribulus terrestris common tansy Tanacetum vulgare C Island County limited in distribution or where they are a local priority. The fol- rush skeletonweed Chondrilla juncea common teasel Dipsacus fullonum C lowing Class B weeds have been designated for control in Island saltcedar Tamarix ramosissima curly pondweed Potamogeton crispus C County by the State Weed Board or selected by the Island County Noxious Weed List shiny geranium Geranium lucidum English hawthorn Crataegus monogyna C Weed Board. Property owners in Island County are required to Spurge Flax Thymelaea passerina Hedera helix ‘Baltica’, control these species. English ivy - four cultivars spurge laurel Daphne laureola ‘Pittsburgh’, and ‘Star’; H. C only Regulated Class A Weeds Common Name Scientific Name spurge, leafy Euphorbia virgata hibernica ‘Hibernica’ These weeds are the highest priority in the state due to their sig- blueweed Echium vulgare spurge, myrtle Euphorbia myrsinites Myriophyllum spicatum x Brazilian elodea Egeria densa sulfur cinquefoil Potentilla recta Eurasian Watermilfoil Hybrid C nificant potential impact and limited distribution. Property owners M. sibiricum throughout Washington are required to eradicate Class A weeds. bugloss, annual Lycopsis arvensis tansy ragwort Jacobaea vulgaris thistle, musk Carduus nutans Common Name Scientific Name bugloss, common Anchusa officinalis evergreen blackberry Rubus laciniatus C thistle, plumeless Carduus acanthoides common crupina Crupina vulgaris camelthorn Alhagi maurorum field bindweed Convolvulus arvensis C thistle, Scotch Onopordum acanthium cordgrass, common Spartina anglica common fennel, (except bulbing Foeniculum vulgare (except F. fragrant waterlily Nymphaea odorata C Abutilon theophrasti cordgrass, denseflowered Spartina densiflora fennel) vulgare var. azoricum) velvetleaf hairy whitetop Lepidium appelianum C common reed (non-native water primrose Ludwigia hexapetala herb-Robert Geranium robertianum B cordgrass, saltmeadow Spartina patens Phragmites australis white bryony Bryonia alba cordgrass, smooth Spartina alterniflora genotypes) Himalayan blackberry Rubus bifrons C wild chervil Anthriscus sylvestris dyer’s woad Isatis tinctoria Dalmatian toadflax Linaria dalmatica ssp. dal- hoary cress Lepidium draba C yellow archangel Lamiastrum galeobdolon South American Spongeplant Limnobium laevigatum European Coltsfoot Tussilago farfara Italian arum Arum italicum C yellow floating heart Nymphoides peltata eggleaf spurge Euphorbia oblongata Eurasian watermilfoil Myriophyllum spicatum Japanese eelgrass Nanozostera japonica C yellow nutsedge Cyperus esculentus false brome Brachypodium sylvaticum fanwort Cabomba caroliniana jointed goatgrass Aegilops cylindrical C yellow starthistle Centaurea solstitialis floating primrose-willow Ludwigia peploides gorse Ulex europaeus jubata grass Cortaderia jubata C flowering rush Butomus unbellatus grass-leaved arrowhead Sagittaria graminea Regulated Class C Weeds lawnweed Soliva sessilis C French broom Genista monspessulana hairy willowherb Epilobium hirsutum lesser celandine Ficaria verna B Class C weeds are generally widespread, but may be selected on garlic mustard Alliaria petiolata hawkweed, oxtongue Picris hieracioides longspine sandbur Cenchrus longispinus C a local level. The following Class C weeds have been designated giant hogweed Heracleum mantegazzianum hawkweed, orange Hieracium aurantiacum medusahead Taeniatherum caput-medusae C for control by the Island County Weed Board based on potential nonnative cattail species C goatsrue Galega officinalis hawkweeds: All nonnative species Hieracium, Pilosella Typha spp. subgenus threats and feasibility of control. Property owners in Island Coun- and hybrids hydrilla Hydrilla verticillata and hybrids of the meadow subgenus hawkweeds: All nonnative species ty are required to control these species. old-man’s-beard Clematis vitalba C Johnsongrass Sorghum halepense Hieracium, subgenus Hieracium knapweed, bighead Centaurea macrocephala and hybrids of the wall subgenus Common Name Scientific Name oxeye daisy Leucanthemum vulgare C pampas grass Cortaderia selloana C knapweed, Vochin Centaurea nigrescens hoary alyssum Berteroa incana bull thistle Cirsium vulgare perennial sowthistle Sonchus arvensis ssp. C kudzu Pueraria montana var. lobata houndstongue Canada thistle Cirsium arvense meadow clary Salvia pratensis indigobush Amorpha fruticosa reed canarygrass Phalaris arundinacea C Elaeagnus angustifolia oriental clematis Clematis orientalis knapweed, black Centaurea nigra Non-regulated Noxious Weeds Russian olive C Tripleurospermum inodo- knapweed, brown Centaurea jacea scentless mayweed C purple starthistle Centaurea calcitrapa The following Class B and C weeds are also on the state noxious rum knapweed, diffuse Centaurea diffusa Ravenna grass Tripidium ravennae weed list but are already widespread. Property owners in Island Scotch broom Cytisus scoparius B Glyceria maxima knapweed, meadow Centaurea x gerstlaueri reed sweetgrass County are not required to control these species, but control is smoothseed alfalfa dodder Cuscuta approximata C Schoenoplectus mucronatus knapweed, Russian Rhaponticum repens ricefield bulrush recommended where feasible. spikeweed Centromadia pungens C sage, clary Salvia sclarea knapweed, spotted Centaurea stoebe Class spiny cocklebur C sage, Mediterranean Salvia aethiopis knotweed, Bohemian Fallopia x bohemicum Common Name Scientific Name absinth wormwood Artemisia absinthium C Spotted jewelweed Impatiens capensis C silverleaf nightshade Solanum elaeagnifolium knotweed, giant Fallopia sachalinensis Austrian fieldcress Rorippa austriaca C Swainsonpea Sphaerophysa salsula C Small flowered jewelweed Impatiens parviflora knotweed, Himalayan Persicaria wallichii babysbreath Gypsophila paniculata C tree-of-heaven Ailanthus altissima C Spanish broom Spartium junceum knotweed, Japanese Fallopia japanica black henbane Hyoscyamus niger C ventenata Ventenata dubia C Syrian beancaper Zygophyllum fabago kochia Bassia scoparia blackgrass Alopecurus myosuroides C white cockle Silene latifolia C Texas blueweed Helianthus ciliaris loosestrife, garden Lysimachia vulgaris buffalobur Solanum rostratum C wild carrot (except where Carduus pycnocephalus loosestrife, purple Lythrum salicaria Daucus carota C thistle, Italian butterflybush Buddleja davidii B commercially grown) thistle, milk Silybum marianum loosestrife, wand Lythrum virgatum cereal rye Secale cereale C yellowflag iris Iris pseudacorus C thistle, slenderflower Carduus tenuiflorus Malta Starthistle Centaurea melitensis common barberry Berberis vulgaris C yellow toadflax Linaria vulgaris C thistle, Turkish Carduus cinereus parrotfeather Myriophyllum aquaticum common catsear Hypochaeris radicata C variable- milfoil Myriophyllum heterophyllum perennial pepperweed Lepidium latifolium Boldface Type - Noxious weeds known to occur in Island County common groundsel Senecio vulgaris C wild four o’clock Mirabilis nyctaginea poison hemlock Conium maculatum