WHAT ARE NOXIOUS WEEDS? WHICH WEEDS SHOULD BE CONTROLLED? Noxious weeds are non-native plants 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: 2019 They can reduce crop yields, destroy native plant 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 People have introduced non-native species both weed list that specifies which weeds landowners are Control Board 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 seed 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 weeds under state law and property owners are not Website: WHAT ARE THE COSTS OF NOXIOUS WEEDS? Each year, these plants cost Washington State required to control them. however, the island county http:// https://www.islandcountywa.gov/Health/ 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 Washington’s noxious weed law (RCW 17.10) (360)-725-5764 Tansy Ragwort requires landowners - including city, county and state land agencies - to control or eradicate certain Email: [email protected] Jacobaea vulgaris noxious weeds that occur on their property. The Website: an aggressive pasture/field invader county noxious weed program is available to provide information on identification and control methods. http://www.nwcb.wa.gov Class B Regulated Weed in Island County 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 a community effort weeds already here. The noxious weed law provides Hairy Willow Herb, Epilobium hirsutum, a way to effectively stop the spread of the new and A Class B Regulated Noxious Weed in Island most damaging weeds. County REGULATED CLASS B WEEDS (continued) NON-REGULATED NOXIOUS WEEDS (continued) Common Name Scientific Name Common Name Scientific Name Class Regulated Class B Weeds policeman’s helmet Impatiens glandulifera 2019 Class B noxious weeds are regulated in counties where they are puncturevine Tribulus terrestris limited in distribution or where they are a local priority. The fol- rush skeletonweed Chondrilla juncea lowing Class B weeds have been designated for control in Island common St. Johnswort Hypericum perforatum C Island County saltcedar Tamarix ramosissima County by the State Weed Board or selected by the Island County shiny geranium Geranium lucidum Weed Board. Property owners in Island County are required to Noxious Weed List Spurge Flax Thymelaea passerina control these species. spurge laurel Daphne laureola common tansy Tanacetum vulgare C Common Name Scientific Name spurge, leafy Euphorbia virgata common teasel Dipsacus fullonum C Regulated Class A Weeds blueweed Echium vulgare spurge, myrtle Euphorbia myrsinites curlyleaf pondweed Potamogeton crispus C These weeds are the highest priority in the state due to their sig- Brazilian elodea Egeria densa sulfur cinquefoil Potentilla recta English hawthorn Crataegus monogyna C tansy ragwort Jacobaea vulgaris nificant potential impact and limited distribution. Property owners bugloss, annual Anchusa arvensis Hedera helix ‘Baltica’, English ivy - four cultivars bugloss, common Anchusa officinalis thistle, musk Carduus nutans ‘Pittsburgh’, and ‘Star’; H. C throughout Washington are required to eradicate Class A weeds. only camelthorn Alhagi maurorum thistle, plumeless Carduus acanthoides hibernica ‘Hibernica’ Common Name Scientific Name common fennel, (except bulbing Foeniculum vulgare (except F. thistle, Scotch Onopordum acanthium Myriophyllum spicatum x common crupina Crupina vulgaris fennel) vulgare var. azoricum) velvetleaf Abutilon theophrasti Eurasian Watermilfoil Hybrid C M. sibiricum cordgrass, common Spartina anglica common reed (non-native water primrose Ludwigia hexapetala Phragmites australis cordgrass, denseflowered Spartina densiflora genotypes) white bryony Bryonia alba evergreen blackberry Rubus laciniatus C cordgrass, saltmeadow Spartina patens Dalmatian toadflax Linaria dalmatica ssp. dalmatica wild chervil Anthriscus sylvestris field bindweed Convolvulus arvensis C cordgrass, smooth Spartina alterniflora European Coltsfoot Tussilago farfara yellow archangel Lamiastrum galeobdolon fragrant waterlily Nymphaea odorata C dyer’s woad Isatis tinctoria Eurasian watermilfoil Myriophyllum spicatum yellow floating heart Nymphoides peltata hairy whitetop Lepidium appelianum C eggleaf spurge Euphorbia oblongata fanwort Cabomba caroliniana yellow nutsedge Cyperus esculentus herb-Robert Geranium robertianum B false brome Brachypodium sylvaticum gorse Ulex europaeus yellow starthistle Centaurea solstitialis Himalayan blackberry Rubus armeniacus C floating primrose-willow Ludwigia peploides grass-leaved arrowhead Sagittaria graminea hoary cress Lepidium draba C flowering rush Butomus unbellatus hairy willowherb Epilobium hirsutum Regulated Class C Weeds Italian arum Arum italicum C Class C weeds are generally widespread, but may be selected on French broom Genista monspessulana hawkweed, oxtongue Picris hieracioides Japanese eelgrass Zostera japonica C a local level. The following Class C weeds have been designated garlic mustard Alliaria petiolata hawkweed, orange Hieracium aurantiacum jointed goatgrass Aegilops cylindrical C for control by the Island County Weed Board based on potential giant hogweed Heracleum mantegazzianum hawkweeds: All nonnative species jubata grass Cortaderia jubata C Hieracium, subgenus Pilosella threats and feasibility of control. Property owners in Island Coun- goatsrue Galega officinalis and hybrids of the meadow subgenus lawnweed Soliva sessilis C hydrilla Hydrilla verticillata hawkweeds: All nonnative species ty are required to control these species. Hieracium, subgenus Hieracium lesser celandine Ficaria verna B Johnsongrass Sorghum halepense and hybrids of the wall subgenus Common Name Scientific Name longspine sandbur Cenchrus longispinus C knapweed, bighead Centaurea macrocephala hoary alyssum Berteroa incana bull thistle Cirsium vulgare medusahead Taeniatherum caput-medusae C knapweed, Vochin Centaurea nigrescens houndstongue Cynoglossum officinale Canada thistle Cirsium arvense nonnative cattail species and C Typha spp. kudzu Pueraria montana var. lobata indigobush Amorpha fruticosa hybrids meadow clary Salvia pratensis knapweed, black Centaurea nigra Non-regulated Noxious Weeds old-man’s-beard Clematis vitalba C knapweed, brown Centaurea jacea oxeye daisy Leucanthemum vulgare C oriental clematis Clematis orientalis The following Class B and C weeds are also on the state noxious knapweed, diffuse Centaurea diffusa pampas grass Cortaderia selloana C purple starthistle Centaurea calcitrapa weed list but are already widespread. Property owners in Island Ravenna grass Saccharum ravennae knapweed, meadow Centaurea x moncktonii perennial sowthistle Sonchus arvensis ssp. arvensis C County are not required to control these species, but control is reed sweetgrass Glyceria maxima knapweed, Russian Rhaponticum repens reed canarygrass Phalaris arundinacea C recommended where feasible. ricefield bulrush Schoenoplectus mucronatus knapweed, spotted Centaurea stoebe Russian olive Elaeagnus angustifolia C sage, clary Salvia sclarea knotweed, Bohemian Polygonum x bohemicum Common Name Scientific Name Class scentless mayweed Matricaria perforata C sage, Mediterranean Salvia aethiopis knotweed, giant Polygonum sachalinense absinth wormwood Artemisia absinthium C Scotch broom Cytisus scoparius B silverleaf nightshade Solanum elaeagnifolium knotweed, Himalayan Persicaria wallichii Austrian fieldcress Rorippa austriaca C smoothseed alfalfa dodder Cuscuta approximata C babysbreath Gypsophila paniculata C Small flowered Jewelweed Impatiens parviflora knotweed, Japanese Polygonum cuspidatum spikeweed Centromadia pungens C black henbane Hyoscyamus niger C Spanish broom Spartium junceum kochia Bassia scoparia spiny cocklebur Xanthium spinosum C blackgrass Alopecurus myosuroides C Syrian beancaper Zygophyllum fabago loosestrife, garden Lysimachia vulgaris Spotted Jewelweed Impatiens capensis C buffalobur Solanum rostratum C Texas blueweed Helianthus ciliaris loosestrife, purple Lythrum salicaria Swainsonpea Sphaerophysa salsula C butterflybush Buddleja davidii B thistle, Italian Carduus pycnocephalus loosestrife, wand Lythrum virgatum tree-of-heaven Ailanthus altissima C cereal rye Secale cereale C thistle, milk Silybum marianum Malta Starthistle Centaurea melitensis ventenata Ventenata dubia C common barberry Berberis vulgaris C thistle, slenderflower Carduus tenuiflorus parrotfeather Myriophyllum aquaticum white cockle Silene latifolia ssp. alba C common catsear Hypochaeris radicata C variable-leaf milfoil Myriophyllum heterophyllum perennial pepperweed Lepidium latifolium common groundsel Senecio vulgaris C Boldface Type – Noxious weeds known to occur in Island County wild four o’clock Mirabilis nyctaginea poison hemlock Conium maculatum