DOUGLAS COUNTY WEED MANAGEMENT TASK FORCE NOXIOUS WEED LIST

Transcription

1 DOUGLAS COUNTY WEED MANAGEMENT TASK FORCE NOXIOUS WEED LIST CLASS A NOXIOUS WEEDS: Eradication is Required Common Name common crupina cordgrass, common cordgrass, dense-flowered cordgrass, salt meadow cordgrass, smooth dyer's woad eggleaf spurge false brome floating primrose-willow flowering rush French broom garlic mustard giant hogweed goatsrue hydrilla Johnsongrass knapweed, bighead knapweed, vochin kudzu meadow clary oriental clematis purple starthistle reed sweetgrass ricefield bulrush sage, clary sage, Mediterranean silverleaf nightshade small-flowered jewelweed Spanish broom Syrian beancaper Texas blueweed thistle, Italian thistle, milk thistle, slenderflower variable-leaf milfoil wild four-o'clock Common Name blueweed Brazilian elodea bugloss, annual bugloss, common butterflybush camelthorn Scientific Name Crupina vulgaris Sartina anglica Spartina densiflora Spartina patens Spartina alterniflora Isatis tinctoria Euphorbia oblongata Brachypodium sylvaticum Ludwigia peploides Butomus umbellatus Genista monspessulana Alliaria petiolata Heracleum mantegazzianum Galega officinalis Hydrilla verticillata Sorghum halepense Centaurea macrocephala Centaurea nigrescens Pueraria montana var. lobata Salvia pratensis Clematis orientalis Centaurea calcitrapa Glyceria maxima Schoenoplectus mucronatus Salvia sclarea Salvia aethiopis Solanum elaeagnifolium Impatiens parviflora Spartium junceum Zygophyllum fabago Helianthus ciliaris Carduus pycnocephalus Silybum marianum Carduus tenuiflorus Myriophyllum heterophyllum Mirabilis nyctaginea CLASS B NOXIOUS WEEDS Scientific Name Echium vulgare Egeria densa Anchusa arvensis anchusa officinalis Buddleja davidii Alhagi maurorum

2 common fennel, (except bulbing fennel) common reed (nonnative genotypes only) Dalmatian toadflax Eurasian watermilfoil Euopean coltsfoot fanwort gorse grass-leaved arrowhead hairy willowherb hawkweed, oxtongue hawkweed, orange hakweeds: All nonnative species and hybrids of the meadow subgenus hakweeds: All nonnative species and hybrids of wall subgenus herb-robert hoary alyssum houndstongue indigobush knapweed, black knapweed, brown knapweed, diffuse knapweed, meadow knapweed, Russian knapweed, spotted knotweed, Bohemiam knotweed, giant knotweed, Himilayan knotweed, Japanese kochia lesser celandine loosestrife, garden loosestrife, purple loosestrife, wand Malta starthistle parrotfeather perennial pepperweed poison hemlock policeman's helmet puncturevine Raveena grass rush skeletonweed saltcedar Scotch broom shiny geranium spurge flax spurge laurel spurge, leafy spurge, myrtle sulfur cinquefoil tansy ragwort Foeniculum vulgare (except F. vulgare var. azoricum) Phragmites australis Linaria dalmatica ssp. dalmatica Myriophyllum spicatum Tussilago farfara Cabomba caroliniana Ulex europaeus Sagittaria graminea Epilobium hirsutum Picris hieracioides Hieracium aurantiacum Hieracium, subgenus Pilosella Hieracium, subgenus Hieracium Geranium robertianum Berteroa incana Cynoglossum officinale Amorpha fruticosa Centaurea nigra Centaurea jacea centaurea diffusa Centaurea x moncktonii Rhaponticum repens Centaurea stoebe Polygonum x bohemicum Polygonum sachalinense Persicaria wallichii Polygonum cuspidatum Bassia scoparia Ficaria verna Lysimachia vulgaris Lythrum salicaria Lythrum virgatum Centaurea melitensis Myriophyllum aquaticum Lepidium latifolium Conium maculatum Impatiens glandulifera Tribulus terrestris Saccharum ravennae Chondrilla juncea Tamarix ramosissima Cytisus scoparius Geranium lucidum Thymelaea passerina Daphne laureola Euphorbia virgata Euphorbia myrsinites Potentilla recta Senecio jacobaea

3 thistle, musk thistle, plumeless thistle, Scotch velvetleaf water primrose white bryony wild chervil yellow archangel yellow floatingheart yellow nutsedge yellow starthistle Carduus nutans Carduus acanthoides Onopordum acanthium Abutilon theophrasti Ludwigia hexapetala Bryonia alba Anthriscus sylvestris Lamiastrum galeobdolon Nymphodies peltata Cyperus esculentus Centaurea solstitialis CLASS C NOXIOUS WEEDS Common Name Scientific Name absinth wormwood Artemisia absinthium Austrian fieldcress Rorippa austriaca babysbreath Gypsophila paniculata black henbane Hyocyamus niger blackgrass Alopecurus myosuroides buffalobur Solanum rosttratum cereal rye Secale cereale common barberry Berberis vulgaris common catsear Hypochaeris radicata common groundsel Senecio vulgaris common St. Johnswort Hypericum perforatum common tansy Tanacetum vulgare common teasel Dipsacus fullonum curlyleaf pondweed Potamogeton crispus English hawthorn Crataegus monogyna Hedera helix 'Baltica', English ivy - four cultivars only 'Pittsburgh', and 'Star', h. hibernica 'Hibernica' Euasian watermilfoil hybrid Myriophyllum spicatum x evergreen blackberry Rubus laciniatus field bindweed Convolvulus arvensis fragrant waterlily Nymphaea odorata hairy whitetop Lepidium appelianum Himalayan blackberry Rubus armeniacus hoary cress lepidium draba Italian arum Arum italicum Japanese eelgrass Zostera japonica jointed goatgrass Aegilops cylindrica jubata grass Cortaderia jubata lawnweed Soliva sessilis longspine sandbur Cenchrus longispinus medusahead Taeniatherum caput-medusae nonnative cattail species and Typha species hybrids (reminder, does not include the native common cattail, Typha latifolia ) old man's beard Clematis vitalba oxeye daisy Leucanthemum vulgare Pampass grass Cortaderia selloana perennial sowthistle Sonchus arvensis ssp. arvensis reed canarygrass Phalaris arundinacea

4 Russian olive scentless mayweed smoothseed alfalfa dodder spikeweed spiny cocklebur spotted jewelweed Swainsonpea thistle, bull thistle, Canada tree-of-heaven ventenata white cockle wild carrot (except where commercially grown) yellow flag iris yellow toadflax Elaeagnus angustifolia Matricaria perforata Cuscuta approximata Hemizonia pungens Xanthium spinosum Impatiens capensis Sphaerophysa salsula Cirsium vulgare Cirsium arvense Ailanthus altissima Ventenata dubia Silene latifolia ssp. alba Daucus carota Iris pseudacorus Linaria vulgaris The Noxious Weed List of Douglas County is comprised of all Class A, B and C noxious weeds as described in the Washington State Noxious Weed List (WAC ). **If you are aware of any noxious weds that are not highlited, please contact the Douglas Couty Weed Mangement Taskforce Noxious Weeds Index Class "A" Noxious Weeds are non native species whose distribution in Washington State is still limited. Eradicating existing infestations and preventing new infestations are the highest priority. Eradication of all Class A plants is required by law. Class "B" noxious weeds are nonnative species whose distribution is limited to portions of Washington State. Species are designated for control in state regions where they are not yet widespread. Prevention of new infestations in these areas is the primary goal. In regions where a Class B species is already abundant, control is decided at the local level. Containment of these weeds is the primary goal so that they do not spread into un infested regions. Class "C" noxious weeds are either already widespread in Washington or are of special interest to the agricultural industry. The Class C status allows a county to enforce control if it is beneficial to that county (for example: to protect crops). Other counties may choose to provide education or technical

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