WHAT ARE NOXIOUS ? 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 Control Board in Island County, please contact: 2020 They can reduce crop yields, destroy native plant and adopts a state noxious weed list each year (WAC 16- , 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 . threat (how dangerous the plant is to humans, ani- NOXIOUS WEED LIST mals, private and public lands, and native ). (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 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 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 Purple Loosestrife Washington’s noxious weed law (RCW 17.10) (360)-725-5764 requires landowners - including city, county and Lythrum salicaria state land agencies - to control or eradicate certain Email: [email protected] noxious weeds that occur on their property. The an aquatic perennial Website: 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 weeds already here. The noxious weed law provides a community effort Juvenile Giant hogweed, Heracleum man- a way to effectively stop the spread of the new and tegazzianum, A Class A Regulated Noxious most damaging weeds. Weed in Island County REGULATED CLASS B WEEDS (continued) NON-REGULATED NOXIOUS WEEDS (continued) Regulated Class B Weeds Common Name Scientific Name Common Name Scientific Name Class 2020 policeman’s helmet Impatiens glandulifera common St. Johnwort C Class B noxious weeds are regulated in counties where they are puncturevine common tansy Tanacetum vulgare limited in distribution or where they are a local priority. The fol- C rush skeletonweed Chondrilla juncea common teasel Island County lowing Class B weeds have been designated for control in Island C saltcedar Tamarix ramosissima curly pondweed Potamogeton crispus County by the State Weed Board or selected by the Island County C shiny geranium Geranium lucidum English hawthorn Crataegus monogyna Noxious Weed List Weed Board. Property owners in Island County are required to C Spurge Flax Thymelaea passerina ‘Baltica’, control these species. English ivy - four spurge laurel Daphne laureola ‘Pittsburgh’, and ‘Star’; C cultivars only H. hibernica ‘Hibernica’ Common Name Scientific Name spurge, leafy Euphorbia virgata Regulated Class A Weeds blueweed Echium vulgare spurge, myrtle Euphorbia myrsinites Myriophyllum spicatum x Brazilian elodea Egeria densa sulfur cinquefoil Potentilla recta Eurasian Watermilfoil Hybrid These weeds are the highest priority in the state due to their sig- M. sibiricum C nificant potential impact and limited distribution. Property owners bugloss, annual Anchusa arvensis tansy ragwort throughout Washington are required to eradicate Class A weeds. bugloss, common Anchusa officinalis thistle, musk Carduus nutans evergreen blackberry Rubus laciniatus C camelthorn Alhagi maurorum thistle, plumeless Carduus acanthoides field bindweed Convolvulus arvensis C Common Name Scientific Name common fennel, (except Foeniculum vulgare thistle, Scotch fragrant waterlily Nymphaea odorata C common crupina Crupina vulgaris bulbing fennel) (except F. vulgare var. velvetleaf Abutilon theophrasti hairy whitetop Lepidium appelianum C cordgrass, common Spartina anglica common reed (non- azoricum) water primrose Ludwigia hexapetala herb-Robert Geranium robertianum B Phragmites australis cordgrass, denseflowered Spartina densiflora native genotypes) white bryony Bryonia alba Himalayan blackberry Rubus armeniacus C cordgrass, saltmeadow Spartina patens Dalmatian toadflax Linaria dalmatica ssp. dalmatica wild chervil Anthriscus sylvestris hoary cress Lepidium draba C yellow archangel Lamiastrum galeobdolon cordgrass, smooth Spartina alterniflora European Coltsfoot Tussilago farfara Italian arum Arum italicum C dyer’s woad Isatis tinctoria Eurasian watermilfoil Myriophyllum spicatum yellow floating heart Nymphoides peltata Japanese eelgrass Zostera japonica C South American Spongeplant Limnobium laevigatum fanwort Cabomba caroliniana yellow nutsedge Cyperus esculentus jointed goatgrass Aegilops cylindrical C eggleaf spurge Euphorbia oblongata gorse Ulex europaeus yellow starthistle jubata grass Cortaderia jubata C false brome Brachypodium sylvaticum grass-leaved arrowhead Sagittaria graminea Regulated Class C Weeds lawnweed Soliva sessilis C floating primrose-willow Ludwigia peploides hairy willowherb Epilobium hirsutum lesser celandine Ficaria verna B flowering rush Butomus unbellatus hawkweed, oxtongue Picris hieracioides Class C weeds are generally widespread, but may be selected on longspine sandbur Cenchrus longispinus C French broom Genista monspessulana hawkweed, orange Hieracium aurantiacum a local level. The following Class C weeds have been designated medusahead Taeniatherum caput-medusae C garlic mustard Alliaria petiolata hawkweeds: All nonnative species for control by the Island County Weed Board based on potential nonnative cattail species and C Hieracium, subgenus Pilosella Typha spp. giant hogweed Heracleum mantegazzianum and hybrids of the meadow subgenus threats and feasibility of control. Property owners in Island Coun- hybrids goatsrue Galega officinalis hawkweeds: All nonnative species ty are required to control these species. old-man’s-beard Clematis vitalba C Hieracium, subgenus Hieracium hydrilla Hydrilla verticillata and hybrids of the wall subgenus Common Name Scientific Name oxeye daisy Leucanthemum vulgare C Johnsongrass Sorghum halepense hoary alyssum Berteroa incana bull thistle pampas grass Cortaderia selloana C knapweed, bighead Centaurea macrocephala houndstongue Cynoglossum officinale Canada thistle perennial sowthistle Sonchus arvensis ssp. arvensis C knapweed, Vochin Centaurea nigrescens indigobush Amorpha fruticosa reed canarygrass Phalaris arundinacea C Pueraria montana var. lobata knapweed, black Non-regulated Noxious Weeds Russian olive Elaeagnus angustifolia C meadow clary Salvia pratensis knapweed, brown Centaurea jacea scentless mayweed Matricaria perforata C The following Class B and C weeds are also on the state noxious Clematis orientalis knapweed, diffuse Centaurea diffusa Scotch broom Cytisus scoparius B oriental clematis weed list but are already widespread. Property owners in Island purple starthistle Centaurea calcitrapa knapweed, meadow Centaurea x moncktonii smoothseed alfalfa dodder Cuscuta approximata C County are not required to control these species, but control is Ravenna grass Saccharum ravennae knapweed, Russian Rhaponticum repens spikeweed Centromadia pungens C recommended where feasible. reed sweetgrass Glyceria maxima knapweed, spotted Centaurea stoebe spiny cocklebur Xanthium spinosum C ricefield bulrush Schoenoplectus mucronatus knotweed, Bohemian Polygonum x bohemicum Common Name Scientific Name Class Spotted jewelweed Impatiens capensis C sage, clary Salvia sclarea knotweed, giant Polygonum sachalinense absinth wormwood Artemisia absinthium C Swainsonpea Sphaerophysa salsula C sage, Mediterranean Salvia aethiopis knotweed, Himalayan Persicaria wallichii Austrian fieldcress Rorippa austriaca C tree-of-heaven C babysbreath Gypsophila paniculata silverleaf nightshade Solanum elaeagnifolium knotweed, Japanese Polygonum cuspidatum C ventenata Ventenata dubia C black henbane Hyoscyamus niger C Small flowered jewelweed Impatiens parviflora kochia Bassia scoparia white cockle Silene latifolia ssp. alba C blackgrass Alopecurus myosuroides C wild carrot (except where Spanish broom Spartium junceum loosestrife, Lysimachia vulgaris Daucus carota buffalobur Solanum rostratum C commercially grown) C Syrian beancaper Zygophyllum fabago loosestrife, purple Lythrum salicaria butterflybush Buddleja davidii B Texas blueweed Helianthus ciliaris loosestrife, wand Lythrum virgatum yellowflag iris Iris pseudacorus C cereal rye Secale cereale C thistle, Italian Carduus pycnocephalus Malta Starthistle Centaurea melitensis yellow toadflax Linaria vulgaris C Berberis vulgaris thistle, milk Silybum marianum parrotfeather Myriophyllum aquaticum common barberry C common catsear Hypochaeris radicata C Boldface Type - Noxious weeds known to occur in thistle, slenderflower Carduus tenuiflorus perennial pepperweed Lepidium latifolium common groundsel C Island County variable-leaf milfoil Myriophyllum heterophyllum poison hemlock Conium maculatum