The Mason County Weed List is updated annually parrotfeather Myriophyllum aquaticum Non-Regulated Noxious Weeds: The following Class B Weeds: Non-native species presently limited ►perennial pepperweed Lepidium latifolium and is made up of all Class A, Class B designates Class B or C weeds from the state to portions of the State. Species are designated for ►poison hemlock Conium maculatum list also impact Mason County, but are widespread. and any selection by the County Weed Board from control in regions where they are not yet widespread. ►policeman’s helmet Impatiens glandulifera the Class B or Class C Weed List. Preventing new infestations in these areas is a high puncturevine Tribulus terrestris Property owners in Mason County are not required ►denotes those species known, or suspected of priority. In regions where a class B species is already rush skeletonweed Chondrilla juncea to control these species, but control is occurring, in Mason County. abundant, control is decided at the local level, with saltcedar Tamarix ramosissima recommended. Class A Weeds: Non-native species whose containment as the primary goal. ►shiny geranium Geranium lucidum distribution in Washington is still limited. Preventing ►spurge laurel Daphne laureola Class B new infestations and eradicating existing spurge, leafy Euphorbia virgata Class B-Designates in Mason County Control is infestations are the highest priority. spurge, myrtle Euphorbia myrsinites required Eradication is required by law. ►sulfur cinquefoil Potentilla recta ►butterfly bush Buddleja davidii thistle, musk Carduus nutans ►herb-Robert Geranium robertianum common crupina Crupina vulgaris thistle, plumeless Carduus acanthoides ►knotweed, Bohemian Polygonum x bohemicum cordgrass, common Spartina anglica ►blueweed Echium vulgare thistle, Scotch Onopordum acanthium ►knotweed, giant Polygonum sachalinense cordgrass, dense-flowered Spartina densiflora ►Brazilian elodea Egeria densa velvetleaf Abutilon theophrasti ►Scotch broom Cytisus scoparius cordgrass, saltmeadow Spartina patens bugloss, annual Anchusa arvensis water primrose Ludwigia hexapetala ►Yellow archangel Lamiastrum galeobdolon cordgrass, smooth Spartina alterniflora bugloss, common Anchusa officinalis white bryony Bryonia alba dyer’s woad Isatis tinctoria camelthorn Alhagi maurorum ►wild chervil Anthriscus sylvestris Class C eggleaf spurge Euphorbia oblongata ►common fennel, (except Foeniculum vulgare except yellow floating heart Nymphoides peltata false brome Brachypodium sylvaticum bulbing fennel) F. vulgare var. azoricum) yellow nutsedge Cyperus esculentus ►common reed (nonnative floating primrose-willow Ludwigia peploides Phragmites australis yellow starthistle solstitialis ►common catsear Hypochaeris radicata flowering rush Butomus umbellatus genotypes only) ►common groundsel vulgaris Linaria dalmatica ssp. French broom Genista monspessulana Dalmatian toadflax ►common St. Johnswort Hypericum perforatum ► dalmatica The Mason County Noxious Weed Control Board garlic mustard Alliaria petiolata ►common Tanacetum vulgare ►Eurasian watermilfoil Myriophyllum spicatum has “selected” the following noxious weeds for Heracleum control in Mason County. ►English hawthorn Crataegus monogyna ►giant hogweed ►European coltsfoot Tussilago farfara Hedera helix ‘Baltica’, mantegazzianum ►English ivy - four cultivars fanwort Cabomba caroliniana ‘Pittsburgh’, and ‘Star’, and H. goatsrue Galega officinalis only hydrilla Hydrilla verticillata gorse Ulex europaeus Class B-Select in Mason County hibernica ‘Hibernica’ ►grass-leaved arrowhead Sagittaria graminea Myriophyllum spicatum x Johnsongrass Sorghum halepense Control is required Eurasian watermilfoil hybrid ►knapweed, bighead Centaurea macrocephala hairy willow-herb Epilobium hirsutum Myriophyllum sibiricum knapweed, Vochin Centaurea nigrescens hawkweed oxtongue Picris hieracioides ►evergreen blackberry Rubus laciniatus Pueraria montana var. ►hawkweed, orange Hieracium aurantiacum ►field bindweed Convolvulus arvensis kudzu ►hawkweeds: All nonnative ►lesser celandine Ficaria verna lobata Hieracium, subgenus ►fragrant waterlily Nymphaea odorata species and hybrids of the Loosestrife, wand Lythrum virgatum meadow clary Salvia pratensis Pilosella ►Himalayan blackberry Rubus armeniacus meadow subgenus ►tansy ragwort vulgaris oriental clematis Clematis orientalis ►Italian arum Arum italicum ►hawkweeds: All nonnative purple starthistle Centaurea calcitrapa Hieracium, subgenus jubata grass Cortaderia jubata species and hybrids of the reed sweetgrass Glyceria maxima Hieracium Class C-Select in Mason County lawnweed Soliva sessilis wall subgenus Schoenoplectus Control is required ►old man's beard Clematis vitalba ricefield bulrush hoary alyssum Berteroa incana mucronatus ►oxeye daisy Leucanthemum vulgare houndstongue Cynoglossum officinale ►sage, clary Salvia sclarea ►Pampas grass Cortaderia selloana indigobush Amorpha fruticosa sage, Mediterranean Salvia aethiopis ►buffalobur Solanum rostratum ►reed canarygrass Phalaris arundinacea knapweed, black silverleaf nightshade Solanum elaeagnifolium ►common teasel Dipsacus fullonum Russian olive Elaeagnus angustifolia knapweed, brown Centaurea jacea small-flowered jewelweed Impatiens parviflora ►perennial sowthistle arvensis ►scentless mayweed Matricaria perforata ►knapweed, diffuse Centaurea diffusa ►Spanish broom Spartium junceum ►smoothseed alfalfa ►knapweed, meadow Centaurea x moncktonii Cuscuta approximata Syrian beancaper Zygophyllum fabago dodder knapweed, Russian Rhaponticum repens Texas blueweed Helianthus ciliaris ►spotted jewelweed Impatiens capensis ►knapweed, spotted Centaurea stoebe thistle, Italian Carduus pycnocephalus ►thistle, bull Cirsium vulgare ►knotweed, Himalayan Persicaria wallichii thistle, milk Silybum marianum ►thistle, Canada Cirsium arvense kochia Bassia scoparia thistle, slenderflower Carduus tenuiflorus ►tree-of-heaven Ailanthus altissima loosestrife, garden Lysimachia vulgaris Myriophyllum ►white cockle Silene latifolia ssp. alba variable- milfoil ►loosestrife, purple Lythrum salicaria heterophyllum ►wild carrot Daucus carota Malta starthistle Centaurea melitensis wild four-o’clock Mirabilis nyctaginea ►yellow flag iris Iris pseudacorus

What are noxious weeds? To help protect the State’s resources and To learn more about noxious weeds and economy, the Washington State Noxious noxious weed control in Mason County and Washington’s noxious weeds are invasive exotic introductions. None of them are native to Washington. Weed Control Board adopts a State Washington State, please contact: 2019 Noxious weeds create public health hazards, lower property values, reduce enjoyment of recreational areas, Noxious Weed List each year (WAC 16- Mason County decrease agricultural productivity, and degrade wildlife 750). This list classifies weeds into three habitat. Noxious weeds are everybody’s problem—the farmer, the home owner, the environmentalist, the major classes – A, B, and C – based on the recreational visitor, the public land manager, and the Noxious Weed List elected official. stage of invasion of each species and the seriousness of the threat they pose to What are landowner responsibilities under the state noxious weed law, RCW Washington State. This classification system

17.10? is designed to: Mason County

Noxious Weed Control Board All landowners, including city, county and state . Prevent small infestations from 303 N. 4th Street governments, are required to eradicate all Class expanding by eradicating them when they A weeds and control Class B designate and Shelton, WA 98584 are first detected selected Class B and Class C weeds on their property. (360)427-9670 ext. 592 There are many ways to control noxious weeds; state law Email: [email protected] does not dictate method. The type of control selected by . Restrict already established weed Website: the landowner should take into consideration the weed, its populations to regions of the state where http://extension.wsu.edu/mason/natural- life cycle, distribution (extent of the problem) and location. they occur and prevent their movement to resources/noxious-weed-program un-infested areas INTEGRATED PEST MANAGEMENT WA State Noxious Weed Control Board . Allow flexibility of weed control at the P.O. Box 42560 Mechanical: Cutting and destroying heads- local level for weeds that are already Olympia, WA 98504-2560 you may have to cut several times to prevent seed widespread (360)-725-5764 production. Always bag and destroy all material (include all roots). Email: [email protected]

Herbicides and Biological: Please contact your Website: http://www.nwcb.wa.gov Linaria dalmatica ssp. dalmatica – Dalmatian toadflax local weed control authority prior to using herbicide designated for control in three additional counties in and biological material. WA State Department of Agriculture Washington for 2019. Check with your County Noxious 21 North First Avenue #103 Weed Control Board to find out about new Class B Cultural: Pasture management, control, grazing, Yakima, WA 98902 designation changes in your county. replant disturbed soil areas; and practice (509) 225-2604 competitive planting procedures. List arranged alphabetically by: Preventative: When possible think about planting WA State Department of Ecology native instead of introducing exotic plants. Research and Resources COMMON NAME http://ecology.wa.gov/Research-Data/Monitoring- assessment/Lake-water-quality