Alaska | Alberta | Arizona | British Columbia | California | Colorado | Hawaii | Idaho | Kansas |
Minnesota | Montana | Nebraska | Nevada | New Mexico | North Dakota | Oregon | Saskatchewan |
South Dakota | Utah | Washington | Wyoming | United States Federal Weed List
Alaska
Source: Alaska Division of Agriculture, Department of Natural Resources, Alaska Plant Materials Center Website, http://dnr.alaska.gov/ag/ag_pmc.htm, accessed May 26, 2010.
Prohibited: The following are prohibited noxious weeds:
- Bindweed, field (Convolvulus arvensis)
- Fieldcress, Austrian (Rorippa austriaca)
- Galensoga (Galensoga parviflora)
- Hempnettle (Galeopsis tetrahit)
- Horsenettle (Solanum carolinense)
- Knapweed, Russian (Acroptilon repens)
- Lettuce, blue-flowering (Lactuca pulchella)
- Quackgrass (Agropyron repens)
- Sowthistle, perennial (Sonchus arvensis)
- Spurge, leafy (Euphorbia esula)
- Thistle, Canada (Cirsium arvense)
- Whitetop and its varieties (Cardaria draba, C. pubescens, Lepidium latifolium)
- Purple loosestrife (Lythrum salicaria)
- Orange hawkweed (Hieracium aurantiacum)
Restricted: The following are restricted noxious weeds in Alaska. Maximum allowable tolerances of seeds per pound have been determined for these species:
- Annual bluegrass (Poa annua)
- Blue burr (Lappula echinata)
- Mustard (Brassica juncea, Sinapis arvensis)
- Oats wild (Avena fatua)
- Plantain, buckhorn (Plantago sp.)
- Radish (Raphanus raphanistrum)
- Toadflax, yellow (Linaria vulgaris)
- Vetch, tufted (Vicia cracca)
- Wild buckwheat (Polygonum convolvulus)
Back to top
Alberta
Prohibited Noxious weeds are species that are not established in Alberta, but have demonstrated detrimental effects in other provinces or states. The objective of identifying them is to prevent them from becoming established in the province.
- autumn olive (Elaeagnus umbellata)
- balsam, Himalayan (Impatiens glandulifera)
- barberry, common (Berberis vulgaris)
- bartsia, red (Odontites vernus)
- buckthorn, common (Rhamnus cathartica)
- cinquefoil, sulphur(Potentilla recta)
- crupina, common (Crupina vulgaris)
- dyer’s woad (Isatis tinctoria)
- Eurasian water milfoil (Myriophyllum spicatum)
- flowering rush (Butomus umbellatus)
- garlic mustard (Alliaria petiolata)
- goatgrass, jointed (Aegilops cylindrica)
- hawkweed, meadow (Hieracium caespitosum)
- hawkweed, mouse-ear (Hieracium pilosella)
- hawkweed, orange (Hieracium aurantiacum)
- hoary alyssum (Berteroa incana)
- hogweed, giant (Heracleum mantegazzianum)
- iris, pale yellow (Iris pseudacorus)
- knapweed, bighead (Centaurea macrocephala)
- knapweed, black (Centaurea nigra)
- knapweed, brown (Centaurea jacea)
- knapweed, diffuse (Centaurea diffusa)
- knapweed, hybrid (Centaurea × psammogena)
- knapweed, meadow (Centaurea × moncktonii)
- knapweed, Russian (Rhaponticum repens)
- knapweed, spotted (Centaurea stoebe ssp. micranthos)
- knapweed, squarrose (Centaurea virgata ssp. squarrosa)
- knapweed, Tyrol (Centaurea nigrescens)
- knotweed, giant (Fallopia sachalinensis)
- knotweed, hybrid Japanese (Fallopia × bohemica)
- knotweed, Japanese (Fallopia japonica)
- loosestrife, purple (Lythrum salicaria)
- medusahead (Taeniatherum caput-medusae)
- nutsedge, yellow (Cyperus esculentus)
- puncturevine (Tribulus terrestris)
- ragwort, tansy (Jacobaea vulgaris)
- rush skeletonweed (Chondrilla juncea)
- saltcedar (Tamarix ramosissima)
- saltlover (Halogeton glomeratus)
- St John’s-wort, common (Hypericum perforatum)
- starthistle, yellow (Centaurea solstitialis)
- tamarisk, Chinese (Tamarix chinensis)
- tamarisk, smallflower (Tamarix parviflora)
- thistle, marsh (Cirsium palustre)
- thistle, nodding (Carduus nutans)
- thistle, plumeless (Carduus acanthoides)
Noxious weeds
are species that are widely spread in various areas of the province, but can still pose a significant economic hardship once established. Controlling the spread of Noxious weeds is critical to protecting areas that are not infested.
- baby’s-breath, common (Gypsophila paniculata)
- bellflower, creeping (Campanula rapunculoides)
- bindweed, field (Convolvulus arvensis)
- blueweed (Echium vulgare)
- brome, downy (Bromus tectorum)
- brome, Japanese (Bromus japonicus)
- burdock, great (Arctium lappa)
- burdock, lesser (Arctium minus)
- burdock, woolly (Arctium tomentosum)
- buttercup, tall (Ranunculus acris)
- chamomile, scentless (Tripleurospermum inodorum)
- clematis, yellow (Clematis tangutica)
- cockle, white (Silene latifolia ssp. alba)
- daisy, oxeye (Leucanthemum vulgare)
- dame’s rocket (Hesperis matronalis)
- henbane, black (Hyoscyamus niger)
- hoary cress, globe-podded (Lepidium appelianum)
- hoary cress, heart-podded (Lepidium draba)
- hoary cress, lens-podded (Lepidium chalepense)
- hound’s-tongue (Cynoglossum officinale)
- mullein, common (Verbascum thapsus)
- pepper-grass, broad-leaved (Lepidium latifolium)
- scabious, field (Knautia arvensis)
- sow thistle, perennial (Sonchus arvensis)
- spurge, leafy (Euphorbia esula)
- tansy, common (Tanacetum vulgare)
- thistle, Canada (Cirsium arvense)
- toadflax, Dalmatian (Linaria dalmatica)
- toadflax, yellow (Linaria vulgaris)
Back to top
Arizona
Source: Arizona Department of Agriculture Website, Prohibited, Regulated and Restricted Noxious Weeds, http://www.azda.gov/psd/quarantine5.htm, accessed May 26, 2010.
Prohibited: The following noxious weeds (includes, plants, stolons, rhizomes, cuttings and seed) are prohibited from entry into the state.
- African rue (Syrian rue) (Peganum harmala L.)
- Alfombrilla (Lightningweed) (Drymaria arenarioides H.B.K.)
- Alligator weed (Alternanthera philoxeroides (Mart.) Griseb.)
- Anchored water hyacinth (Eichhornia azurea (SW) Kunth.)
- Austrian fieldcress (Rorippa austriaca (Crantz.) Bess.)
- Branched broomrape (Orobanche ramosa L.)
- Buffelgrass (Pennisetum ciliare (L.) Link)
- Burclover (Medicago polymorpha L.)
- Camelthorn (Alhagi pseudalhagi (Bieb.) Desv.)
- Canada thistle (Cirsium arvense L. Scop.)
- Carolina horsenettle (Solanum carolinense L.)
- Common purslane (Portulaca oleracea L.)
- Creeping wartcress (Coronopus) (Coronopus squamatus (Forskal) Ascherson)
- Dalmation toadflax (Linaria genistifolia var. dalmatica)
- Diffuse knapweed (Centaurea diffusa L.)
- Dodder (Cuscuta spp.)
- Dudaim melon (Queen Anne’s melon) (Cucumis melo L. var. Dudaim Naudin)
- Dyers woad (Isatis tinctoria L.)
- Field bindweed (Convolvulus arvensis L.)
- Field sandbur (Cenchrus incertus M.A. Curtis)
- Floating water hyacinth (Eichhornia crassipes (Mart.) Solms)
- Giant salvina (Salvinia molesta)
- Globed-podded hoary cress (Whitetop) (Cardaria draba (L.) Desv.)
- Hairy whitetop (Cardaria pubescens (C.A. Mey) Jarmolenko)
- Halogeton (Halogeton glomeratus (M. Bieb.) C.A. Mey)
- Hydrilla (Florida-elodea) (Hydrilla verticillata Royale)
- Iberian starthistle (Centaurea iberica Trev. ex Spreng.)
- Jointed goatgrass (Aegilops cylindrica Host.)
- Leafy spurge (Euphorbia esula L.)
- Lens podded hoary cress (Cardaria chalepensis (L.) Hand-Muzz)
- Morning glory. All species except Ipomoea carnea (Mexican bush morning glory); Ipomoea triloba three-lobed morning glory, which is considered a restricted pest); and Ipomoea aborescens( morning glory tree, Ipomoea spp.)
- Perennial sowthistle (Sonchus arvensis L.)
- Plumeless thistle (Carduus acanthoides L.)
- Puna grass (Stipa brachychaeta Godr.)
- Puncturevine. (Tribulus terrestris L.)
- Purple loosestrife (Lythrum salicaria L.)
- Purple starthistle (Centaurea calcitrapa L.)
- Quackgrass (Elytrigia repens (L.) Nevski)
- Rush skeletonweed (Chondrilla juncea L.)
- Russian knapweed (Acroptilon repens (L.) DC.)
- Scotch thistle (Onopordum acanthium L.)
- Serrated tussock (Nassella trichotoma(Nees.) Hack.)
- Sicilian starthistle (Centaurea sulphurea L.)
- Southern sandbur (Cenchrus echinatus L.)
- Spotted knapweed (Centaurea maculosa L.)
- Squarrose knapweed (Centaurea squarrosa Willd.)
- Tansy ragwort (Senecio jacobaea L.)
- Texas blueweed (Helianthus ciliaris DC.)
- Three-lobed morning glory (Ipomoea triloba L.)
- Torpedo grass (Panicum repens L.)
- Tropical Soda Apple (Solanum viarum Dunal)
- Water-chestnut (Trapa natans L.)
- Witchweed (Striga spp.)
- Yellow starthistle (St. Barnaby’s thistle) (Centaurea solstitialis L.)
Regulated:The following noxious weeds are regulated (includes plants, stolons, rhizomes, cuttings and seed) and if found within the state may be controlled or quarantined to prevent further infestation or contamination.
- Buffelgrass (Pennisetum ciliare L.)
- Burclover (Medicago polymorpha L.)
- Common purslane (Portulaca oleracea L.)
- Field bindweed (Convolvulus arvensis L.)
- Field sandbur (Cenchrus incertus M.A. Curtis)
- Floating water hyacinth (Eichhornia crassipes (Mart.) Solms)
- Giant Salvinia (Salvinia molesta)
- Puncturevine (Tribulus terrestris L.)
- Southern sandbur (Cenchrus echinatus L.)
Restricted: The following noxious weeds are restricted (includes plants, stolons, rhizomes, cuttings and seed) and if found within the state shall be quarantined to prevent further infestation or contamination.
- Camelthorn (Alhagi pseudalhagi Bieb.) Desv.)
- Dalmation toadflax (Linaria genistifolia var. dalmatica)
- Diffuse knapweed (Centaurea diffusa L.)
- Dodder (Cuscuta spp.)
- Floating water hyacinth (Eichhornia crassipes (Mart.) Solms)
- Globed-podded hoary cress (Whitetop) (Cardaria draba (L.) Desv.)
- Halogeton (Halogeton glomeratus (M. Bieb.) C.A. Mey)
- Jointed goatgrass (Aegilops cylindrica Host.)
- Quackgrass (Elytrigia repens (L.) Nevski)
- Russian knapweed (Acroptilon repens (L.) DC.)
- Scotch thistle (Onopordum acanthium L.)
- Spotted knapweed (Centaurea maculosa L.)
- Sweet resinbush (Euryops sunbcarnosus subsp. vulgaris)
- Texas blueweed (Helianthus ciliaris DC.)
- Three-lobed morning glory (Ipomoea triloba L.)
- Yellow starthistle (St. Barnaby’s thistle) (Centaurea solstitialis L.)
Back to top
British Columbia
Source: British Columbia Ministry of Agriculture and Lands, Pest Management Website, http://www.agf.gov.bc.ca/cropprot/noxious.htm, accessed May 26, 2010.
The following weeds are classified as noxious within all regions of British Columbia:
- Annual sow thistle (Sonchus oleraceus)
- Canada thistle (Cirsium arvense)
- Crupina (Crupina vulgaris)
- Dalmatian toadflax (Linaria dalmatica)
- Diffuse knapweed (Centaurea diffusa)
- Dodder (Cuscuta spp.)
- Gorse (Ulex europaeus)
- Hounds-tongue (Cynoglossum officinale)
- Jointed goatgrass (Aegilops cylindrica)
- Leafy spurge (Euphorbia esula)
- Perennial sowthistle (Sonchus arvensis)
- Purple nutsedge (Cyperus rotundus)
- Rush skeletonweed (Chondrilla juncea)
- Scentless chamomile (Matricaria maritima)
- Spotted knapweed (Centaurea maculosa)
- Tansy ragwort (Senecio jacobaea)
- Velvetleaf (Abutilon theophrasti)
- Wild oats (Avena fatua)
- Yellow nutsedge (Cyperus esculentus)
- Yellow starthistle (Centaurea solstitialis)
- Yellow toadflax (Linaria vulgaris)
The following weeds are classified as noxious within the boundaries of the corresponding regional districts:
| Blueweed | Echium vulgare | Cariboo, Central Kootenay, Columbia-Shuswap, East Kootenay, Okanagan-Similkameen, Thompson-Nicola |
| Burdock | Arctium spp. | Bulkley-Nechako, Cariboo, Columbia-Shuswap, Fraser-Fort George, Kitimat-Stikine, North Okanagan, Okanagan-Similkameen, Peace River, Thompson-Nicola |
| Cleavers | Galium aparine | Peace River |
| Common Bugloss |
Anchusa officinalis |
Kootenay-Boundary |
| Common Tansy | Tanacetum vulgare | Bulkley-Nechako,
Central Kootenay, Columbia-Shuswap, East Kootenay, North Okanagan |
| Field Scabious | Knautia arvensis | Bulkley-Nechako,
Kootenay-Boundary, Thompson-Nicola |
| Green Foxtail | Setaria viridis | Peace River |
| Hoary Alyssum |
Berteroa incana |
Kootenay-Boundary |
| Hoary Cress | Cardaria spp. | Columbia-Shuswap, North Okanagan, Thompson-Nicola |
| Kochia | Kochia scoparia | Peace River |
| Marsh Plume Thistle |
Cirsium palustre |
Bulkley-Nechako, Fraser-Fort George |
| Meadow Knapweed | Centaurea pratensis | Columbia-Shuswap |
| Night-Flowering Catchfly | Silene noctiflora | Peace River |
| Orange Hawkweed | Hieracium aurantiacum | Bulkley-Nechako,
Cariboo, Central Kootenay, Columbia-Shuswap, East Kootenay, Thompson-Nicola |
| Oxeye Daisy | Chrysanthemum leucanthemum | Cariboo, North Okanagan, Peace River, Thompson-Nicola |
| Perennial Pepperweed | Lepidium latifolium | East Kootenay, Thompson-Nicola |
| Plumeless Thistle | Carduus acanthoides | Central Kootenay |
| Puncturevine | Tribulus terrestris | Okanagan-Similkameen |
| Purple Loosestrife | Lythrum salicaria | Comox-Strathcona
(by regional district bylaw) |
| Quackgrass | Agropyron repens | Peace River |
| Russian Knapweed | Acroptilon repens | North Okanagan |
| Russian Thistle | Salsola kali | Peace River |
| Scotch Thistle | Onopordum acanthium | North Okanagan |
| Sulphur Cinquefoil | Potentilla recta | Columbia-Shuswap, North-Okanagan, Okanagan-Similkameen, Thompson-Nicola |
| Tartary Buckwheat | Fagopyrum tataricum | Peace River |
| White Cockle | Lychnis alba | Peace River |
| Wild Chervil | Anthriscus sylvestris | Fraser Valley |
| Wild Mustard | Sinapsis arvensis | Peace River |
Back to top
California
Source: California Department of Agriculture, Plant Health and Pest Prevention Services Division, Integrated Pest Control, Encycloweedia Website, Barclays Official California Code Of Regulations
Title 3. Food And Agriculture
Division 4. Plant Industry
Chapter 6. Weed Free Areas And Weed Eradication Areas
Subchapter 6. Noxious Weed Species
http://www.cdfa.ca.gov/phpps/ipc/encycloweedia/pdf/winfo_ca_code_of_regulations.pdf, accessed July 7, 2010.
It has been determined that the following species of plants are noxious weeds within the meaning of Section 5004 of the
Food and Agricultural Code. (Note: This regulation shall in no way restrict the designation of a weed pest to those species listed herein.)
- alligatorweed (Alternanthera philoxeroides)
- artichoke thistle (Cynara cardunculus)
- Austrian fieldcress (Rorippa austriaca)
- Austrian peaweed (Sphaerophysa salsula)
- banana waterlily (Nymphaea mexicana)
- barb goatgrass (Aegilops triuncialis)
- barbwire Russianthistle (Salsola paulsenii)
- bearded creeper (Crupina vulgaris)
- biddy biddy (Acaena anserinifolia, Acaena novae-zelandiae, Acaena pallida )
- black henbane (Hyoscyamus niger)
- bladderflower (Araujia sericofera)
- blue panicgrass (Panicum antidotale)
- blueweed (Helianthus ciliaris)
- branched broomrape (Orobanche ramosa)
- bull thistle (Cirsium vulgare)
- camelthorn (Alhagi maurorum)
- Canada thistle (Cirsium arvense)
- Cape ivy (Senecio mikanioides (Delairea odorata) )
- capeweed, as seed or fertile plants (Arctotheca calendula)
- Carolina horsenettle (Solanum carolinense)
- coast sandbur (Cenchrus incertus)
- common Russianthistle (Salsola australis)
- creeping mesquite (Prosopis strombulifera)
- Dalmatian toadflax (Linaria genistifolia ssp. dalmatica)
- diffuse knapweed (Centaurea diffusa)
- dodder (Cuscuta spp.)
- dudaim melon (Cucumis melo var. dudaim)
- dyer's woad (Isatis tinctoria)
- European mistletoe (Viscum album)
- false garlic (Nothoscordum inodorum)
- field bindweed (Convolvulus arvensis)
- French broom (Genista monspessulana)
- giant foxtail (Setaria faberi)
- giant knotweed (Polygonum sachalinense)
- giant ragweed (Ambrosia trifida)
- giant reed (Arundo donax)
- globe-podded hoary cress (Cardaria pubescens)
- golden thistle (Scolymus hispanicus)
- gorse (Ulex europaeus)
- grape groundcherry (Physalis viscosa)
- halogeton (Halogeton glomeratus)
- harmel (Peganum harmala)
- heartleaf nightshade (Solanum cardiophyllum)
- heart-podded hoary cress (Cardaria draba)
- Himalayan knotweed (Polygonum polystachyum)
- hydrilla (Hydrilla verticillata)
- Iberian starthistle (Centaurea iberica)
- Italian thistle (Carduus pycnocephalus, Carduus tenuiflorus )
- Japanese knotweed (Polygonum cuspidatum)
- Johnsongrass and other perennial Sorghum spp. including but not limited to Sorghum almumand perennial sweet sudangrass (Sorghum halepense)
- jointed goatgrass (Aegilops cylindrica)
- jubata grass (Cortaderia jubata)
- Kangaroo thorn (Acacia paradoxa)
- Kikuyugrass (Pennisetum clandestinum)
- Klamath weed (Hypericum perforatum)
- lanceleaf nightshade (Solanum lanceolatum)
- leafy spurge (Euphorbia esula)
- lens-podded hoary cress (Cardaras chalepensis)
- mat sandbur (Cenchrus longispinus)
- meadow sage (Salvia virgata)
- Mediterranean sage (Salvia aethiopis)
- medusahead (Taeniatherum caput-medusae)
- musk thistle (Carduus nutans)
- nimblewill (Muhlenbergia schreberi)
- oblong spurge (Euphorbia oblongata)
- ovate goatgrass (Aegilops ovata)
- Oxford ragwort (Senecio squalidus)
- paddy melon (Cucumis myriocarpus)
- panicled onion (Allium paniculatum)
- perennial peppercress (Lepidium latifolium)
- perennial sowthistle (Sonchus arvensis)
- plumeless thistle (Carduus acanthoides)
- punagrass (Achnatherum brachychaetum)
- puncture vine (Tribulus terrestris)
- purple loosestrife (Lythrum salicaria)
- purple mustard (Chorispora tenella)
- purple nutsedge (Cyperus rotundus)
- purple starthistle (Centaurea calcitrapa)
- quackgrass (Elytrigia repens)
- red rice (Oryza rufipogon)
- rough comfrey (Symphytum asperum)
- rough jointvetch (Aeschynomene rudis)
- Russian knapweed (Acroptilon repens)
- Russian salt tree (Halimodendron halodendron)
- salt cedar (Tamarix chinensis, Tamarix gallica, Tamarix parviflora, Tamarix ramosissima )
- scented gaura (Gaura drummondii)
- Scotch broom (Cytisus scoparius)
- serrate spurge (Euphorbia serrata)
- Sicilian thistle (Centaurea sulphurea)
- skeletonweed (Chondrilla juncea)
- smooth distaff thistle (Carthamus baeticus)
- smooth groundcherry (Physalis virginiana var. sonorae)
- southern sandbur (Cenchrus echinatus)
- Spanish broom (Spartium junceum)
- spotted knapweed (Centaurea maculosa)
- squarrose knapweed (Centaurea squarrosa)
- swinecress (Coronopus squamatus)
- Syrian beancaper (Zygophyllum fabago)
- tanglehead (Heteropogon contortus)
- tansy ragwort (Senecio jacobaea)
- thistles (Onopordum spp. onopordum)
- tocalote (Centaurea melitensis)
- Torrey's nightshade (Solanum dimidiatum)
- tree of heaven (Ailanthus altissima)
- wavyleaf gaura (Gaura sinuata)
- wavyleaf thistle (Cirsium undulatum)
- white horsenettle (Solanum elaeagnifolium)
- white-margined nightshade (Solanum marginatum)
- whitestem distaff thistle (Carthamus leucocaulos)
- wild garlic (Allium vineale)
- wild marigold (Tagetes minuta)
- witchweed (Striga lutea)
- woolly distaff thistle (Carthamus lanatus)
- wormleaf salsola (Salsola vermiculata)
- yellow nutsedge (Cyperus esculentus)
- yellow starthistle (Centaurea solstitialis)
- yellowspine thistle (Cirsium ochrocentrum)
Back to top
Colorado
List A species in Colorado that are designated by the Commissioner for eradication.
- African rue (Peganum harmala)
- Camelthorn (Alhagi pseudalhagi)
- Common crupina (Crupina vulgaris)
- Cypress spurge (Euphorbia cyparissias)
- Dyer's woad (Isatis tinctoria)
- Giant salvinia (Salvinia molesta)
- Hydrilla (Hydrilla verticillata)
- Meadow knapweed (Centaurea pratensis)
- Mediterranean sage (Salvia aethiopis)
- Medusahead (Taeniatherum caput-medusae)
- Myrtle spurge (Euphorbia myrsinites)
- Orange hawkweed (Hieracium aurantiacum)
- Purple loosestrife (Lythrum salicaria)
- Rush skeletonweed (Chondrilla juncea)
- Sericea lespedeza (Lespedeza cuneata)
- Squarrose knapweed (Centaurea virgata)
- Tansy ragwort (Senecio jacobaea)
- Yellow starthistle (Centaurea solstitialis)
List B weed species are species for which the Commissioner, in consultation with the state noxious weed advisory committee, local governments, and other interested parties, develops and implements state noxious weed management plans designed to stop the continued spread of these species.
- Absinth wormwood (Artemisia absinthium)
- Black henbane (Hyoscyamus niger)
- Bouncingbet (Saponaria officinalis)
- Bull thistle (Cirsium vulgare)
- Canada thistle (Cirsium arvense)
- Chinese clematis (Clematis orientalis)
- Common tansy (Tanacetum vulgare)
- Common teasel (Dipsacus fullonum)
- Corn chamomile (Anthemis arvensis)
- Cutleaf teasel (Dipsacus laciniatus)
- Dalmatian toadflax, broad-leaved (Linaria dalmatica)
- Dalmatian toadflax, narrow-leaved (Linaria genistifolia)
- Dame's rocket (Hesperis matronalis)
- Diffuse knapweed (Centaurea diffusa)
- Eurasian watermilfoil (Myriophyllum spicatum)
- Hoary cress (Cardaria draba)
- Houndstongue (Cynoglossum officinale)
- Jointed goatgrass (Aegilops cylindrica)
- Leafy spurge (Euphorbia esula)
- Mayweed chamomile (Anthemis cotula)
- Moth mullein (Verbascum blattaria)
- Musk thistle (Carduus nutans)
- Oxeye daisy (Chrysanthemum leucanthemum)
- Perennial pepperweed (Lepidium latifolium)
- Plumeless thistle (Carduus acanthoides)
- Quackgrass (Elytrigia repens)
- Russian knapweed (Acroptilon repens)
- Russian-olive (Elaeagnus angustifolia)
- Saltcedar (Tamarix chinensis, T.parviflora, and T. ramosissima)
- Scentless chamomile (Matricaria perforata)
- Scotch thistle (Onopordum acanthium)
- Scotch thistle (Onopordum tauricum)
- Spotted knapweed (Centaurea maculosa)
- Spurred anoda (Anoda cristata)
- Sulfur cinquefoil (Potentilla recta)
- Venice mallow (Hibiscus trionum)
- Wild caraway (Carum carvi)
- Yellow nutsedge (Cyperus esculentus)
- Yellow toadflax (Linaria vulgaris)
List C weed species are species for which the Commissioner, in consultation with the state noxious weed advisory committee, local governments, and other interested parties, will develop and implement state noxious weed management plans designed to support the efforts of local governing bodies to facilitate more effective integrated weed management on private and public lands. The goal of such plans will not be to stop the continued spread of these species but to provide additional education, research, and biological control resources to jurisdictions that choose to require management of List C species.
- Chicory (Cichorium intybus)
- Common burdock (Arctium minus)
- Common mullein (Verbascum thapsus)
- Common St. Johnswort (Hypericum perforatum)
- Downy brome (Bromus tectorum)
- Field bindweed (Convolvulus arvensis)
- Halogeton (Halogeton glomeratus)
- Johnsongrass (Sorghum halepense)
- Perennial sowthistle (Sonchus arvensis)
- Poison hemlock (Conium maculatum)
- Puncturevine (Tribulus terrestris)
- Redstem filaree (Erodium cicutarium)
- Velvetleaf (Abutilon theophrasti)
- Wild proso millet (Panicum miliaceum)
Back to top
Hawaii
List of Plant Species Designated as Noxious Weeds for Eradication or Control Purposes by the Hawaii Department of Agriculture, June 18, 1992
Scientific Name |
Common Name |
Islands Free or Relatively Free |
Acacia mearnsii |
black wattle |
Molokai |
Acaena novae- zelandiae |
New Zealand bur, piripiri |
All islands |
Acroptilon repens |
Russian knapweed |
All islands |
Aeschynomene indica |
Kat sola, Indian jointvetch |
All islands |
Ageratina adenophora |
croftonweed, Maui pamakani |
Hawaii, Kauai |
Ageratina riparia |
creeping croftonweed, Hamakua pamakani |
Kauai |
Allium vineale |
wild garlic |
All islands |
Andropogon bicornis |
West Indian foxtail |
Maui, Lanai, Molokai, Oahu, Kauai |
Andropogon virginicus |
broomsedge |
Molokai, Lanai, Oahu, Kauai |
Anredera cordifolia |
Madeira vine |
Maui |
Ardisia elliptica |
shoebutton ardisia |
Maui, Molokai, Lanai, Oahu, Kauai |
Bocconia frutescens |
plume poppy |
All islands |
Cardaria pubescens |
hairy whitetop |
All islands |
Cereus uruguayanus |
spiny tree cactus, Peruvian apple |
All islands |
Chromolaena odorata |
siamweed, bitterbush |
All islands |
Cirsium arvense |
Canada thistle |
All islands |
Clidemia hirta var. hirta |
Koster's curse, curse |
Kauai, Lanai |
Coccinia grandis |
ivy gourd |
Hawaii, Maui, Molokai, Lanai, Kauai |
Convolvulus arvensis |
field bindweed |
All islands |
Cortaderia jubata |
|
All islands |
Cymbopogon refractus |
barbwire grass |
Lanai, Oahu |
Cyperus esculentus |
yellow nutsedge |
Maui, Oahu, Lanai, Kauai, Molokai |
Cytisus monspessulanus |
French broom |
All islands |
Cytisus scoparius |
Scotch broom |
All islands |
Dichrostachys nutans |
marabu |
All islands |
Elephantopus mollis |
elephantopus, elephant's foot |
Maui, Oahu, Lanai |
Elytrigia repens |
quackgrass |
All islands |
Emex spinosa |
spiny emex |
Lanai, Kauai |
Eriocereus martinii |
moon cactus |
All islands |
Euphorbia esula |
leafy spurge |
All islands |
Grevillea banksii |
kahiliflower, Bank's grevillea |
Lanai, Maui, Molokai |
Halogeton glomeratus |
halogeton |
All islands |
Hyptis pectinata |
comb hyptis |
Kauai, Molokai, Lanai, Oahu |
Hyptis suaveolens |
wild spikenard |
All islands |
Imperata cylindrica |
cogon |
All islands |
Lagascea mollis |
acuate |
All islands |
Lepidium latifolium |
perennial pepperweed |
All islands |
Malachra alceifolia |
malachra |
All islands |
Medinilla venosa |
|
Hawaii, Lanai, Molokai, Oahu, Kauai |
Melastoma spp. |
melastoma |
All islands |
Miconia spp. |
miconia |
All islands |
Mikania micanthra |
mile-a-minute |
All islands |
Mikania scandens |
climbing hempweed |
All islands |
Mimosa invisa |
giant sensitive plant |
All islands |
Mimosa pigra |
thorny sensitive plant |
All islands |
Miscanthus floridulus |
miscanthus, Japanese silvergrass |
All islands |
Montanoa hibiscifolia |
tree daisy |
Maui |
Myrica faya |
firetree, candleberry myrtle |
Maui, Lanai, Molokai, Oahu |
Oxyspora paniculata |
|
Maui, Molokai, Lanai, Kauai |
Panicum repens |
torpedograss |
Maui, Molokai, Lanai, Oahu, Kauai |
Passiflora mollissima |
banana passionfruit, banana poka |
Maui, Molokai, Lanai, Oahu |
Passiflora pulchella |
wingleaf passionfruit |
All islands |
Pennisetum setaceum |
fountaingrass |
Maui, Molokai, Lanai, Oahu, Kauai |
Piper aduncum |
spiked pepper |
All islands |
*Pistia stratiotes |
Nile cabbage, tropical duckweed, water cabbage, water lettuce |
|
Pittosporum undulatum |
Victorian box |
Maui, Oahu, Lanai, Kauai, Molokai |
Prosopis juliflora |
|
All islands |
Pueraria phaseoloides |
tropical kudzu |
All islands |
Rhodomyrtus tomentosa |
downy rosemyrtle |
Maui, Molokai, Lanai, Oahu |
Rubus argutus |
prickly Florida blackberry |
Lanai, Molokai |
Rubus ellipticus var. obcordatus |
yellow Himalayan raspberry |
Maui, Molokai, Lanai, Oahu, Kauai |
Rubus niveus |
hill raspberry |
Molokai, Lanai, Oahu, Kauai |
Rubus sieboldii |
Molucca raspberry |
All islands |
Salsola kali |
Russian thistle |
All islands |
*Salvinia minima |
Water fern |
|
*Salvinia molesta |
African payal, aquarium water-moss, giant salvinia, kariba weed, salvinia, water fern |
|
Senecio madagascariensis |
fireweed |
All islands |
Solanum carolinense |
horsenettle |
All islands |
Solanum elaeagnifolium |
silverleaf nightshade |
All islands |
Solanum robustum |
|
All islands |
Solanum torvum |
turkeyberry, terongan |
All islands |
Sonchus arvensis |
perennial sowthistle |
All islands |
Spartium junceum |
Spanish broom |
All islands |
Stipa trichotoma |
nasella tussock |
All islands |
Striga spp. |
witchweeds |
All islands |
Themeda villosa |
Lyon's grass |
Maui, Molokai, Lanai, Oahu, Kauai |
Tibouchina spp. |
tibouchina |
Maui, Molokai, Lanai, Oahu, Kauai |
Triumfetta rhomboidea |
paroquet bur |
Kauai, Maui |
Triumfetta semitriloba |
Sacramento bur |
Lanai, Oahu, Molokai, Kauai |
Ulex europaeus |
gorse |
Hawaii, Oahu, Lanai, Kauai, Molokai, Maui |
Urena lobata |
caesarweed |
Hawaii, Maui, Molokai, Lanai, Kauai |
Verbascum thapsus |
mullein |
Maui, Molokai, Lanai, Oahu, Kauai |
Back to top
Idaho
Idaho has 64 different species of weeds which are designated noxious by state law. These weeds are designated into three levels of concern. The spread of these weeds and the damage they do to Idaho agriculture can be lessened through proper identification and handling.
Statewide EDRR List
- Brazilian Elodea (Egeria densa)
- Common/European Frogbit (Hydrcharis morsus-ranae)
- Fanwort (Cobomba caroliniana)
- Feathered Mosquito Fern (Azolla pinnata)
- Giant Hogweed(Heracleum mantegazzianum)
- Giant Salvinia Salvinia molesta)
- Hydrilla(Hydrilla verticillata)
- Policeman's Helmet(Impatiens glandulifera)
- Squarrose Knapweed (Centaurea triumfetti)
- Syrian Beancaper (Zygophyllum fabago)
- Tall Hawkweed (Hieracium piloselloides)
- Variable-Leaf-Milfoil (Myriophyllum heterophyllum)
- Water Chestnut (Trapa natans)
- Yellow Devil Hawkweed (Hieracium glomeratum)
- Yellow Floating Heart (Nymphoides pelata)
Statewide Control List
- Black Henbane(Hyoscyamus niger)
- Bohemian Knotweed Polygonum bohemicum)
- Buffalobur (Solanum rostratum)
- Common Crupina (Crupina vulgaris)
- Common Reed (Phragmites) (Phragmites australis)
- Dyer's Woad (Isatis Tinctoria)
- Eurasian Watermilfoil (Myriophyllum spicatum)
- Giant Knotweed (Polygonum sachalinense)
- Japanese Knotweed (Polygonum cuspidatum
- Johnsongrass (Sorghum halepense)
- Matgrass(Nardus stricta)
- Meadow Knapweed (Centaurea debeauxii)
- Mediterranean Sage (Salvia aethiopis)
- Musk Thistle (Carduus nutans
- Orange Hawkweed (Hieracium aurantiacum)
- Parrotfeather Milfoil (Myriophyllum aquaticum)
- Perennial Sowthistle (Sonchus arvensis)
- Russian Knapweed (Acroptilon repens)
- Scotch Broom (Cytisus scoparius)
- Small Bugloss(Anchusa arvensis)
- Vipers Bugloss (Echium vulgare)
- Yellow Hawkweed (Hieracium caespitosum)
Statewide Containment List
- Canada Thistle (Cirsium arvense)
- Curlyleaf Pondweed (Potamogeton crispus)
- Dalmatian Toadflax (Linaria dalmatica ssp. dalmatica)
- Diffuse Knapweed(Centaurea diffusa)
- Field Bindweed (Convolvulus arvensis)
- Flowering Rush (Butomus umbelltus)
- Hoary Alyssum(Berteroa incana)
- Houndstongue(Cynoglossum officinale)
- Jointed Goatgrass (Aegilpos cylindrica)
- Leafy Spurge (Euphorbia esula)
- Milium (Milium vernale)
- Oxeye Daisy (Leucanthemum vulgare)
- Perennial Pepperweed (Lepidium latifolium)
- Plumeless Thistle (Carduus acanthoides)
- Poison Hemlock (Conium maculatum)
- Puncturevine (Tribulus terrestris)
- Purple Loosestrife (Lythrum salicaria)
- Rush Skeletonweed (Chondrilla juncea)
- Saltcedar (Tamarix sp.)
- Scotch Thistle (Onopordum acanthium)
- Spotted Knapweed (Centaurea stoebe)
- Tansy Ragwort (Senecio jacobaea)
- White Bryony (Bryonia alba)
- Whitetop (Cardaria draba)
- Yellow Flag Iris (Iris psudocorus)
- Yellow Starthistle (Centaurea solstitialis)
- Yellow Toadflax (Linaria vulgaris)
Back to top
Kansas
Source: Kansas Department of Agriculture, Plant Protection and Weed Control, Kansas Statutes Annotated (April 2007), The Kansas Noxious Weed Law, http://www.ksda.gov/plant_protection/statutes/id/47, accessed May 27, 2010; and, Quarantines and Laws, http://www.ksda.gov/plant_protection/content/360, accessed July 7, 2010.
In Kansas, it is the duty of anyone who owns or supervises land "to control the spread of and to eradicate" all noxious weeds:
- Bur ragweed (Ambrosia grayii)
- Canada thistle (Cirsium arvense)
- Field bindweed (Convolvulus arvensis)
- Hoary cress (Cardaria draba)
- Johnsongrass (Sorghum halepense)
- Kudzu (Peuraria lobata)
- Leafy spurge (Euphorbia esula)
- Musk (nodding) thistle (Carduus nutans)
- Pignut (Hoffmannseggia densiflora)
- Quackgrass (Agropyron repens)
- Russian knapweed (Centaurea repens)
- Sericea lespedeza (Lespedeza cuneata)
In addition, any county may declare one or both of the following species "noxious" within the county and state statutes regarding control and eradiation will apply:
- Multiflora rose (Rosa multiflora)
- Bull thistle (Cirsium vulgare)
Quarantined Plant Pests—organisms that are not native to Kansas and the United States. These organisms are considered high-risk threats to Kansas agriculture and environment. Quarantine action is intended to reduce the risk of these organisms becoming established and/or widespread in the state.
- Federal Noxious Weeds
- Grecian Foxglove (Digitalis lanata)
- Karnal Bunt
- Purple Loosestrife (all species and
hybrids of Lythrum except Lythrum alatum and Lythrum californicum).
Back to top
Minnesota
Sources:
State prohibited noxious weeds. The plants listed are prohibited noxious weeds because they are injurious to public health, the environment, public roads, crops, livestock, and other property. Prohibited noxious weeds must be controlled or eradicated as required in Minnesota statutes, section 18.78.
- Field Bindweed (Convolvulus arvensis)
- Hemp (Cannabis sativa)
- Loosestrife, purple (Lythrum salicaria, L. virgatum, or any combination)
- Mustard, garlic (Alliaria petiolata)
- Poison Ivy (Toxicodendron radicans) (native species to Minnesota)
- Spurge, leafy (Euphorbia esula)
- Sow thistle, perennial (Sonchus arvensis)
- Thistle, bull (Cirsium vulgare)
- Thistle, Canada (Cirsium arvense)
- Thistle, musk (Carduus nutans)
- Thistle, plumeless (Carduus acanthoides)
Restricted Noxious Weeds. These plants listed are restricted noxious weeds whose only feasible means of control is to prohibit the importation, sale, and transportation of them or their propagating parts in the state except as provided by Minnesota Statutes, section 18.82.
- Buckthorn, common (Rhamnus cathartica or European)
- Buckthorn, glossy (Rhamnus frangula) (columnaris, including all cultivars tallcole, asplenifolia, and all other cultivars)
Secondary Noxious Weeds. These weeds may be added to a county prohibited or restricted list by following the process in part 1505.0750.
- Alyssum, hoary (Berteroa incana)
- Artichoke, Jerusalem (Helianthus tuberosus)
- Bracken (Pteridium aquilinum)
- Buckwheat, wild (Polygonum convolvulus)
- Buffalobur (Solanum rostratum)
- Burdock Hill (Arctium minus)
- Buttercup, tall (Ranunculus acris)
- Carrot, wild (Daucus carota)
- Catchfly, nightflowering (Silene noctiflora)
- Cockle, white (Lychnis alba)
- Cocklebur, common (Xanthium pennsylvanicum)
- Daisy, oxeye (Chrysanthemum leucanthemum)
- Dock, curly (Rumex crispus)
- Flixweed (Descurainia Sophia)
- Foxtail, giant (Setaria faberii)
- Grecian foxglove (Digitalis lanata)
- Gumweed, curlycup (Grindelia squarrosa)
- Hawksbeard, narrowleaf (Crepis tectorum)
- Hawksbeard, smooth (Crepis capillaries)
- Hawkweed, orange (Hieracium aurantiacum)
- Jimsonweed (Datura stramonium)
- Knapweed, Russian (Centaurea repens)
- Knapweed, spotted (Centaurea maculosa)
- Kochia (Kochia scoparia)
- Lambsquarters, common (Chenopodium album)
- Mallow, venice (Hibiscus trionum)
- Marshelder (Iva xanthifolia)
- Milkweed, common (Asclepias syriaca)
- Muhly, wirestem (Muhlenbergia frondosa)
- Mustard, wild (Brassica kaber)
- Nightshade, black (Solanum nigrum)
- Nutsedge, yellow (nutgrass) (Cyperus esculentus)
- Oat, wild (Avena fatua)
- Panicum, fall (Panicum dichotomiflorum)
- Panicum, wild proso millet (Panicum miliaceum)
- Pigweed, redroot (Amaranthus retroflexus)
- Pigweed, prostrate (Amaranthus blitoides)
- Quackgrass (Agropyron repens)
- Radish, wild (Raphanus raphanistrum)
- Ragweed, common (Ambrosia artemisiifolia)
- Ragweed, giant (Ambrosia trifida)
- Sandbur, long spined (Cenchrus longispinus)
- Smartweed, Pennsylvania (Polygonum pennsylvanicum)
- Smartweed, (ladysthumb) (Polygonum persicaria)
- Sorghum-almum (Sorghum almum)
- Sunflower, common (except cultivars) (Helianthus annuus)
- Tansy (Tanacetum vulgare)
- Thistle, Russian (Salsola kali)
- Velvetleaf (Abutilon theophrasti)
- Woolly cupgrass (Eriochloa villosa)
- Wormwood, absinthe (Artemisia absinthium)
- Yellow rocket (Barbarea vulgaris)
Early Detection Species that the Minnesota Department of Agriculture has identified as “target species” in its early detection efforts.
- Black swallow-wort (Cynanchum louiseae)
- British yellowhead (Inula britannica)
- Common teasel (Dipsacus fullonum)
- Cut-leaved teasel (Dipsacus laciniatus)
- Dalmation toadflax (Linnaria dalmatica)
- Grecian foxglove (Digitalis lanata)
- Meadow knapweed (Centaurea x moncktonii)
- Narrowleaf bittercress (Cardamine impatiens)
- Oriental bittersweet (Celastrus orbiculatus)
- Yellow starthistle (Centurea solstitialis)
Back to top
Montana
Source: Montana Department of Agriculture, Montana Noxious Weed Program Webpage, http://agr.mt.gov/weedpest/pdf/weedlist2010.pdf, State Noxious Weed List, accessed April 20, 2010.
| Priority 1A |
These weeds are not present in Montana. Management criteria will require eradication if detected; education; and prevention.
- Yellow starthistle (Centaurea solstitialis)
|
| Priority 1B |
These weeds have limited presence in Montana. Management criteria will require eradication or containment and education.
- Dyer’s woad (Isatis tinctoria)
- Flowering rush (Butomus umbellatus)
- Japanese knotweed complex (Polygonum spp.)
- Purple loosestrife (Lythrum spp.)
- Rush skeletonweed (Chondrilla juncea)
- Eurasian watermilfoil (Myriophyllum spicatum)
- Scotch broom (Cytisus scoparius)
- Curlyleaf pondweed (Potamageton crispus)
|
| Priority 2A |
These weeds are common in isolated areas of Montana. Management criteria will require eradication or containment where less abundant. Management shall be prioritized by local weed districts.
- Tansy ragwort (Senecio jacobea)
- Meadow hawkweed complex (Hieracium spp.)
- Orange hawkweed (Hieracium aurantiacum)
- Tall buttercup (Ranunculus acris)
- Perennial pepperweed (Lepidium latifolium)
- Yellowflag iris (Iris pseudacorus)
- Blueweed (Echium vulgare)
- Hoary alyssum (Berteroa incana)
|
| Priority 2B |
These weeds are abundant in Montana and widespread in many counties. Management criteria will require eradication or containment where less abundant. Management shall be prioritized by local weed districts.
- Canada thistle (Cirsium arvense)
- Field bindweed (Convolvulus arvensis)
- Leafy spurge (Euphorbia esula)
- Whitetop (Cardiaria draba)
- Russian kapweed (Centaurea repens)
- Spotted knapweed (Centauria stoebe or maculosa)
- Diffuse knapweed (Centaurea diffusa)
- Dalmatian toadflax (Linaria dalmatica)
- St. John’swort (Hypericum perforatum)
- Sulfur cinquefoil (Potentilla recta)
- Common tansy (Tanacetum vulgare)
- Oxeye daisy (Chrysanthemum leucanthemum)
- Houndstongue (Cynoglossum officinale)
- Yellow toadflax (Linaria vulgaris)
- Saltcedar (Tamarix spp.)
|
| Priority 3 |
Regulated Plants: (NOT MONTANA LISTED NOXIOUS WEEDS) These regulated plants have the potential to have significant negative impacts. The plant may not be intentionally spread or sold other than as a contaminant in agricultural products. The state recommends research, education and prevention to minimize the spread of the regulated plant.
- Cheatgrass (Bromus tectorum)
- Hydrilla (Hydrilla verticillata)
|
Back to top
Nebraska
Nine plant species are identified as noxious weeds in Nebraska:
- Canada thistle (Cirsium arvense)
- Common reed (Phragmites australis)
- Diffuse knapweed (Centaurea diffusa)
- Leafy spurge (Euphorbia esula)
- Musk thistle (Carduus nutans)
- Plumeless thistle (Carduus acanthoides)
- Purple loosestrife (Lythrum salicaria)
- Saltcedar (tamarisk) (Tamarix ramosissima, T. parviflora)
- Spotted knapweed (Centaurea maculosa)
Back to top
Nevada
Source Nevada Department of Agriculture, Plant Industry Division, Noxious Weed List, http://agri.nv.gov/nwac/PLANT_NoxWeedList.htm, accessed May 27, 2010.
Category A: Weeds not found or limited in distribution throughout the state; actively excluded from the state and actively eradicated wherever found; actively eradicated from nursery stock dealer premises; control required by the state in all infestations.
- African rue (Peganum harmala)
- Austrian fieldcress (Rorippa austriaca)
- Austrian peaweed (Sphaerophysa salsula / Swainsona salsula)
- Black henbane (Hyoscyamus niger)
- Camelthorn (Alhagi pseudalhagi)
- Common crupina (Crupina vulgaris)
- Dalmatian toadflax(Linaria dalmatica)
- Dyer's woad (Isatis tinctoria)
- Eurasian watermilfoil (Myriophyllum spicatum)
- Giant reed(Arundo donax)
- Giant salvinia (Salvinia molesta)
- Goats rue (Galega officinalis)
- Green fountain grass (Pennisetum setaceum)
- Houndstongue (Cynoglossum officinale)
- Hydrilla (Hydrilla verticillata)
- Iberian starthistle (Centaurea iberica)
- Klamath weed (St. Johnswort)(Hypericum perforatum)
- Malta starthistle (Centaurea melitensis)
- Mayweed chamomile (Anthemis cotula)
- Mediterranean sage (Salvia aethiopis)
- Purple loosestrife (Lythrum salicaria, L. virgatum and cultivars)
- Purple starthistle (Centaurea calcitrapa)
- Rush skeletonweed (Chondrilla juncea)
- Sow thistle (Sonchus arvensis)
- Spotted knapweed(Centaurea maculosa)
- Squarrose starthistle (Centaurea virgata var. squarrosa)
- Sulfur cinquefoil (Potentilla recta)
- Syrian bean caper (Zygophyllum fabago)
- Yellow starthistle (Centaurea solstitialis)
- Yellow toadflax(Linaria vulgaris)
Category B: Weeds established in scattered populations in some counties of the state; actively excluded where possible, actively eradicated from nursery stock dealer premises; control required by the state in areas where populations are not well established or previously unknown to occur.
- Carolina horse nettle(Solanum carolinense)
- Diffuse knapweed(Centaurea diffusa)
- Leafy spurge (Euphorbia esula)
- Medusahead (Taeniatherum caput-medusae)
- Musk thistle (Carduus nutans)
- Russian knapweed (Acroptilon repens)
- Sahara mustard (Brassica tournefortii)
- Scotch thistle(Onopordum acanthium)
- White horse nettle (Solanum elaeagnifolium)
Category C: Weeds currently established and generally widespread in many counties of the state; actively eradicated from nursery stock dealer premises; abatement at the discretion of the state quarantine officer
- Canada thistle(Cirsium arvense)
- Hoary cress (Cardaria draba)
- Johnson grass (Sorghum halpense)
- Perennial pepperweed (Lepidium latifolium)
- Poison hemlock (Conium maculatum)
- Puncturevine (Tribulus terrestris)
- Saltcedar (tamarisk)(Tamarix spp.)
- Water hemlock (Cicuta maculata)
Back to top
New Mexico
Class A species are currently not present in New Mexico, or have limited distribution. Preventing new infestations of these species and eradicating existing infestations is the highest priority.
- Alfombrilla (Drymaria arenariodes)
- Black henbane (Hyoscyamus niger)
- Camelthorn (Alhagi psuedalhagi)
- Canada thistle (Cirsium arvense)
- Dalmation toadflax (Linaria dalmatica)
- Diffuse knapweed (Centaurea diffusa)
- Dyer’s woad (Isatis tinctoria)
- Eurasian watermilfoil (Myriophyllum spicatum)
- Giant salvinia (Salvinia molesta)
- Hoary cress (Cardaria spp.)
- Hydrilla (Hydrilla verticllata)
- Leafy spurge (Euphorbia esula)
- Oxeye daisy (Leucanthemum vulgare)
- Parrotfeather (Myriophyllum aquaticum)
- Purple loosestrife (Lythrum salicaria)
- Purple starthistle (Centaurea calcitrapa)
- Ravenna grass (Saccharum ravennae)
- Scotch thistle (Onopordum acanthium)
- Spotted knapweed (Centaurea biebersteinii)
- Yellow starthistle (Centaurea solstitialis)
- Yellow toadflax (Linaria vulgaris)
Class B species are limited to portions of the state. In areas with severe infestations, management should be designed to contain the infestation and stop any further spread.
- African rue (Peganum harmala)
- Chicory (Cichorium intybus)
- Halogeton (Halogeton glomeratus)
- Malta starthistle (Centaurea melitensis)
- Musk thistle (Carduus nutans)
- Perennial pepperweed (Lepidium latifolium)
- Russian knapweed (Acroptilon repens)
- Poison hemlock (Conium maculatum)
- Teasel (Dipsacus fullonum)
- Tree of heaven (Ailanthus altissima)
Class C species are wide-spread in the state. Management decisions for these species should be determined at the local level, based on feasibility of control and level of infestation.
- Bull thistle (Cirsium vulgare)
- Cheatgrass (Bromus tectorum)
- Jointed goatgrass (Aegilops cylindrica)
- Russian olive (Elaeagnus angustifolia)
- Saltcedar (Tamarix spp.)
- Siberian elm (Ulmus pumila)
Watch List species are of concern in the state. These species have the potential to become problematic. More data is needed to determine if these species should be listed. When these species are encountered please document their location and contact appropriate authorities.
- Crimson fountaingrass (Pennisetum setaceum)
- Giant cane (Arundo donax)
- Meadow knapweed (Centaurea pratensis)
- Pampas grass (Cortaderia sellonana)
- Quackgrass (Elytrigia repens)
- Sahara mustard (Brassica tournefortii)
- Spiny cocklebur (Xanthium spinosum)
- Wall rocket (Diplotaxis tenuifolia)
Back to top
North Dakota
Weeds declared "noxious" are those that are difficult to control, easily spread, and injurious to public health, crops, livestock, land or other property. The following weeds have been declared noxious in North Dakota:
- Absinth wormwood (Artemisia absinthium)
- Canada thistle (Cirsium arvense)
- Dalmatian toadflax (Linaria genistifolia))
- Diffuse knapweed (Centaurea diffusa)
- Leafy spurge (Euphorbia esula)
- Musk thistle (Carduus nutans)
- Purple loosestrife (Lythrum salicaria)
- Russian knapweed (Acroptilon repens)
- Saltcedar (Tamarix ramosissima, T. chinensis, T. parviflora)
- Spotted knapweed (Centaurea maculosa)
- Yellow toadflax ( Linaria vulgaris )
Back to top
Oregon
Source: Oregon Department of Agriculture
Noxious Weed Control Program (http://www.oregon.gov/ODA/PLANT/WEEDS/about_us.shtml), Noxious Weed Policy
and
Classification System
2010, http://www.oregon.gov/ODA/PLANT/WEEDS/docs/weed_policy.pdf, accessed 5/27/10.
“A” Designated Weed: a weed of known economic importance which occurs in the
state in small enough infestations to make eradication or containment possible; or is
not known to occur, but its presence in neighboring states make future occurrence in
Oregon seem imminent. Recommended action: Infestations are subject to eradication or intensive control
when and where found.
- African rue (Peganum harmala)
- Camelthorn (Alhagi pseudalhagi)
- Coltsfoot (Tussilago farfara)
- Common reed (Phragmites australis)
- Cordgrass, Common
(Spartina anglica
)
- Cordgrass, Dense-flowered
(Spartina densiflora
)
- Cordgrass, Saltmeadow
(Spartina patens
)
- Cordgrass, Smooth (Spartina alterniflora)
- European water chestnut (Trapa natans)
- Flowering rush (Butomus umbellatus)
- Giant hogweed (Heracleum mantegazzianum)
- Goatgrass, Barbed (Aegilops triuncialis)
- Goatgrass, Ovate (Aegilops ovata)
- Goatsrue (Galega officinalis)
- Hawkweed, King-devil (Hieracium piloselloides)
- Hawkweed, Meadow (Hieracium pratense)
- Hawkweed, Mouse-ear (Hieracium pilosella)
- Hawkweed, Orange (Hieracium aurantiacum)
- Hawkweed, Yellow (Hieracium floribundum)
- Hydrilla (Hydrilla verticillata)
- Japanese dodder (Cuscuta japonica)
- Kudzu (Pueraria lobata)
- Matgrass (Nardus stricta)
- Oblong spurge (Euphorbia oblongata)
- Paterson’s curse (Echium plantagineum)
- Purple nutsedge (Cyperus rotundus)
- Silverleaf nightshade (Solanum elaeagnifolium)
- Skeletonleaf bursage (Ambrosia tomentosa)
- Spanish heath (Erica lusitanica)
- Squarrose knapweed (Centaurea virgata)
- Starthistle, Iberian (Centaurea iberica)
- Starthistle, Purple (Centaurea calcitrapa)
- Syrian bean-caper (Zygophyllum fabago)
- Texas blueweed (Helianthus ciliaris)
- Thistle, Plumeless (Carduus acanthoides)
- Thistle, Smooth distaff (Carthamus baeticus)
- Thistle, Taurian (Onopordum tauricum)
- Thistle, Wooly distaff (Carthamus lanatus)
- White bryonia (Bryonia alba)
- Yellow floating heart (Nymphoides peltata)
- Yellowtuft (Alyssum murale, Alyssum corsicum)
“B” Designated Weed: a weed of economic importance which is regionally
abundant, but which may have limited distribution in some counties.
Recommended action: Limited to intensive control at the state, county or regional
level as determined on a site specific, case-by-case basis. Where implementation of a
fully integrated statewide management plan is not feasible, biological control (when
available) shall be the primary control method.
- Armenian (Himalayan) blackberry (Rubus armeniacus (R. procerus, R. discolor))
- Biddy-biddy (Acaena novae-zelandiae)
- Broom, French (Genista monspessulana)
- Broom, Portuguese (Cytisus striatus)
- Broom, Scotch (Cytisus scoparius)
- Broom, Spanish (Spartium junceum)
- Buffalobur (Solanum rostratum)
- Butterfly bush (Buddleja davidii (B. variabilis))
- Common bugloss (Anchusa officinalis)
- Common crupina (Crupina vulgaris)
- Creeping yellow cress (Rorippa sylvestris)
- Cutleaf teasel (Dipsacus laciniatus)
- Dodder (Cuscuta spp.)
- Dyers woad (Isatis tinctoria)
- English ivy (Hedera helix (H. hibernica))
- Eurasian watermilfoil (Myriophyllum spicatum)
- False brome (Brachypodium sylvaticum)
- Field bindweed (Convolvulus arvensis)
- Garlic mustard (Alliaria petiolata)
- Geranium, herb Robert (Geranium robertianum)
- Geranium, shiny leaf geranium (Geranium lucidum)
- Giant horsetail (Equisetum telmateia)
- Gorse (Ulex europaeus)
- Halogeton (Halogeton glomeratus)
- Houndstongue (Cynoglossum officinale)
- Johnsongrass (Sorghum halepense)
- Jointed goatgrass (Aegilops cylindrica)
- Jubata grass (Cortaderia jubata)
- Knapweed, Diffuse (Centaurea diffusa)
- Knapweed, Meadow (Centaurea pratensis)
- Knapweed, Russian (Acroptilon repens)
- Knapweed, Spotted (Centaurea stoebe (C. maculosa))
- Knotweed, Giant (Fallopia sachalinensis (Polygonum))
- Knotweed, Himalayan (Polygonum polystachyum)
- Knotweed, Japanese (Fallopia japonica (Polygonum))
- Kochia (Kochia scoparia)
- Lesser celandine (Ranunculus ficaria)
- Mediterranean sage (Salvia aethiopis)
- Medusahead rye (Taeniatherum caput-medusae)
- Old man's beard (Clematis vitalba)
- Parrot's feather (Myriophyllum aquaticum)
- Perennial peavine (Lathyrus latifolius)
- Perennial pepperweed (Lepidium latifolium)
- Poison hemlock (Conium maculatum)
- Policeman's helmet (Impatiens glandulifera)
- Puncturevine (Tribulus terrestris)
- Purple loosestrife (Lythrum salicaria)
- Quackgrass (Agropyron repens)
- Ragweed (Ambrosia artemisiifolia)
- Rush skeletonweed (Chondrilla juncea)
- Saltcedar (Tamarix ramosissima)
- Small broomrape (Orabanche minor)
- South American waterweed (Egeria densa (Elodea))
- Spikeweed (Hemizonia pungens)
- Spiny cocklebur (Xanthium spinosum)
- Spurge laurel (Daphne laureola)
- Spurge, Leafy (Euphorbia esula)
- Spurge, Myrtle (Euphorbia myrsinites)
- St. Johnswort (Hypericum perforatum)
- Sulfur cinquefoil (Potentilla recta)
- Swainsonpea (Sphaerophysa salsula)
- Tansy ragwort (Senecio jacobaea)
- Thistle, Bull (Cirsium vulgare)
- Thistle, Canada (Cirsium arvense)
- Thistle, Italian (Carduus pycnocephalus)
- Thistle, Milk (Silybum marianum)
- Thistle, Musk (Carduus nutans)
- Thistle, Scotch (Onopordum acanthium)
- Thistle, Slender-flowered (Carduus tenuiflorus)
- Toadflax, Dalmatian (Linaria dalmatica)
- Toadflax, Yellow (Linaria vulgaris)
- Velvetleaf (Abutilon theophrasti)
- Whitetop, Hairy (Lepidium pubescens)
- Whitetop, Lens-podded (Lepidium chalepensis)
- Whitetop, (hoary cress) (Lepidium draba)
- Yellow flag iris (Iris pseudacorus)
- Yellow nutsedge (Cyperus esculentus)
- Yellow starthistle (Centaurea solstitialis)
“T” Designated Weed: a priority noxious weed designated by the Oregon State
Weed Board as a target for which the ODA will develop and implement a statewide
management plan. “T” designated noxious weeds are species selected from either
the “A” or “B” list.
- African rue (Peganum harmala)
- Barbed goatgrass (Aegilops triuncialis)
- Common bugloss (Anchusa officinalis)
- Cordgrass, Common
(Spartina anglica)
- Cordgrass, Dense-flowered
(Spartina densiflora)
- Cordgrass, Saltmeadow (Spartina patens)
- Cordgrass,Smooth (Spartina alterniflora)
- Dalmatian toadflax (Linaria dalmatica)
- False brome (Brachypodium sylvaticum)
- Field bindweed (Convolvulus arvensis)
- Garlic mustard (Alliaria petiolata)
- Giant hogweed (Heracleum mantegazzianum)
- Gorse (Ulex europaeus)
- Hawkweed, Meadow
(Hieracium pratense)
- Hawkweed, Orange
(Hieracium aurantiacum)
- Hawkweed, Yellow (Hieracium floribundum)
- Knapweed, Spotted
(Centaurea stoebe (C. maculosa))
- Knapweed, Squarrose (Centaurea virgata)
- Knotweed, Giant
(Fallopia sachalinensis (Polygonum))
- Knotweed, Japanese (Fallopia japonica (Polygonum))
- Kudzu (Pueraria lobata)
- Leafy spurge (Euphorbia esula)
- Matgrass (Nardus stricta)
- Paterson’s curse (Echium plantagineum)
- Perennial pepperweed (Lepidium latifolium)
- Portuguese broom (Cytisus striatus)
- Rush skeletonweed (Chondrilla juncea)
- Saltcedar (Tamarix ramosissima)
- Starthistle, Iberian
(Centaurea iberica)
- Starthistle, Purple
(Centaurea calcitrapa)
- Starthistle, Yellow (Centaurea solstitialis)
- Tansy ragwort (Senecio jacobaea)
- Thistle, Plumeless
(Carduus acanthoides)
- Thistle, Taurian (Onopordum tauricum)
- Thistle, Woolly distaff (Carthamus lanatus)
- Yellowtuft (Alyssum murale Alyssum corsicum)
Back to top
Saskatchewan
Government of Saskatchewan, Weed Inspectors in Saskatchewan Webpage (http://www.agriculture.gov.sk.ca/Default.aspx?DN=29c16f28-dd8a-4d3c-a1c9-8503f9e262db), Noxious Weeds Designation Regulation (Weed List) PDF, http://www.qp.gov.sk.ca/documents/English/Regulations/Regulations/N9-1R2.pdf, accessed May 27, 2010
- Barberry, common (Berberis vulgaris)
- Bindweed, field (Convolvulus arvensis)
- Bluebur (Lappula echinata)
- Buckwheat, wild (Polygonum convolvulus)
- Buckwheat, tartary (Fagopyrum tataricum)
- Brome, downy (Bromus tectorum)
- Brome, Japanese (Bromus japonicus)
- Campion, bladder (Silene vulgaris)
- Catchfly, night-flowering (Silene noctiflora)
- Chamomile, scentless (Matricaria perforata)
- Cleavers (Galium aparine)
- Cockle, cow (Saponaria vaccaria)
- Cockle, white (Silene alba)
- Cockle, purple (Agrostemma githago)
- Dandelion (Taraxacum officinale)
- Darnel, Persian (Lolium persicum)
- False flax, small-seeded (Camelina microcarpa)
- Foxtail, green (Setaria viridis)
- Grass, quack (Elytrigia repens)
- Hoary cress, heart-podded (Cardaria draba)
- Knapweed, spotted (Centaurea maculosa)
- Knapweed, diffuse (Centaurea diffusa)
- Knapweed, Russian (Centaurea repens)
- Loosestrife, purple (Lythrum salicaria)
- Mallow, round-leaved (Malva rotundifolia)
- Mustard, hare's-ear (Conringia orientalis)
- Mustard, ball (Neslia paniculata)
- Mustard, tumble (Sisymbrium altissimum)
- Mustard, wild (Sinapis arvensis)
- Oat, wild (Avena fatua)
- Povertyweed (Iva axillaries)
- Ragweed, common (Ambrosia artemisiifolia)
- Rape, bird (Brassica rapa)
- Sowthistle, annual (Sonchus oleraceus)
- Sowthistle, perennial (Sonchus arvensis)
- Spurge, leafy (Euphorbia esula)
- Stinkweed (Thlaspi arvense)
- Thistle, nodding (Carduus nutans)
- Thistle, Russian (Salsola kali)
- Thistle, Canada (Cirsium arvense)
- Toadflax, yellow (Linaria vulgaris)
Back to top
South Dakota
State Noxious Weeds. Those weeds which the South Dakota Weed and Pest Commission has designated as sufficiently detrimental to the state to warrant enforcement of control measures.
- Canada thistle (Cirsium arvense)
- Hoary cress or whitetop (Cardaria draba)
- Leafy spurge (Euphorbia esula)
- Perennial sow thistle (Sonchus arvensis)
- Purple loosestrife (Lythrum salicaria)
- Russian knapweed (Centaurea repens)
- Saltcedar (Tamarix aphylla, T. chinensis, T. gallica, T. parviflora, T. ramosissima)
Locally Listed Weeds. In addition to the State listed Noxious weeds, counties may add up to eight locally noxious weeds or pest from the list below.
- Absinth wormwood (Artemisia absinthium)
- Black henbane (Hyoscyamus niger)
- Bull thistle (Cirsium vulgare)
- Chicory (Cichorium intybus)
- Common burdock (Arctium minus)
- Common mullein (Verbascum thapsus)
- Common tansy (Tanacetum vulgare)
- Dalmatian toadflax (Linaria dalmatica)
- Diffuse knapweed (Centaurea diffusa)
- Field bindweed (Convolvulus arvensis)
- Giant knotweed (Polygonum sachalinense)
- Houndstongue (Cynoglossum officinale)
- Musk thistle (Carduus nutans)
- Phragmites (Phragmites australis)
- Plumeless thistle (Carduus acanthoides)
- Poison hemlock (Conium maculatum)
- Puncturevine (Tribulus terrestris)
- Scotch thistle (Onopordum acanthium)
- Spotted knapweed (Centaurea maculosa)
- St. Johnswort (Hypericum perforatum)
- Yellow toadflax (Linaria vulgaris)
Back to top
Utah
Utah Department of Agriculture and Food, Noxious Weed Program Website (http://ag.utah.gov/divisions/plant/noxious/index.html ), Utah Noxious Weed List, October 2008, http://ag.utah.gov/divisions/plant/noxious/documents/noxUtah.pdf, accessed May 27, 2010.
The following weeds are officially designated and published as noxious for the State of Utah:
- Bermudagrass (except in Washington County) (Cynodon dactylon)
- Black henbane (Hyoscyamus niger)
- Canada thistle (Cirsium arvense)
- Dalmatian toadflax (Linaria dalmatica)
- Diffuse knapweed (Centaurea diffusa)
- Dyers woad (Isatis tinctoria L.)
- Field bindweed (Wild Morning Glory) (Convolvulus arvensis)
- Hoary cress (Cardaria Spp.)
- Houndstongue (Cynoglossum officinale)
- Johnsongrass (Sorghum halepense)
- Leafy spurge (Euphorbia esula)
- Medusahead (Taeniatherum caput-medusae)
- Musk thistle (Carduus nutans)
- Ox-Eye daisy (Chrysanthemum leucanthemum)
- Perennial pepperweed (Lepidium latifolium)
- Perennial sorghum (Sorghum halepense L., Sorghum almum)
- Poison hemlock (Conium maculatum)
- Purple loosestrife (Lythrum salicaria L.)
- Quackgrass (Agropyron repens)
- Russian knapweed (Centaurea repens)
- Saltcedar (Tamarix ramosissima)
- Scotch thistle (Onopordum acanthium)
- Spotted knapweed (Centaurea maculosa)
- Squarrose knapweed (Centaurea squarrosa)
- St. John’s wort (Hypericum perforatum)
- Sulfur cinquefoil (Potentilla recta)
- Yellow starthistle (Centaurea solstitialis)
- Yellow toadflax (Linaria vulgaris)
Back to top
Washington
Class A Weeds: Non-native species whose distribution in Washington is still limited. Preventing new infestations and eradicating existing infestations are the highest priority.
Eradication of all Class A plants is required by law
- Buffalobur (Solanum rostratum )
- Common crupina (Crupina vulgaris )
- Cordgrass, common (Spartina anglica )
- Cordgrass, dense flower (Spartina densiflora )
- Cordgrass, salt meadow (Spartina patens )
- Cordgrass, smooth (Spartina alterniflora )
- Dyers woad (Isatis tinctoria )
- Eggleaf spurge (Euphorbia oblongata )
- False brome (Brachypodium sylvaticum )
- Floating primrose-willow (Ludwigia peploides )
- Fllowering rush (Butomus umbellatus )
- Garlic mustard (Alliaria petiolata )
- Giant hogweed (Heracleum mantegazzianum )
- Goatsrue (Galega officinalis )
- Hawkweed, European (Hieracium sabaudum )
- Hawkweed, yellow devil (Hieracium floribundum )
- Hydrilla (Hydrilla verticillata )
- Johnsongrass (Sorghum halepense )
- Knapweed, bighead (Centaurea macrocephala )
- Knapweed, Vochin (Centaurea nigrescens )
- Kudzu (Pueraria montana var. lobata )
- Meadow clary (Salvia pratensis )
- Purple starthistle (Centaurea calcitrapa )
- Reed sweetgrass (Glyceria maxima )
- Ricefield bulrush (Schoenoplectus mucronatus )
- Sage, clary (Salvia sclarea )
- Sage, Mediterranean (Salvia aethiopis )
- Shiny geranium (Geranium lucidum )
- Silverleaf nightshade (Solanum elaeagnifolium )
- Spanish broom (Spartium junceum )
- Spurge flax (Thymelaea passerina )
- Syrian bean-caper (Zygophyllum fabago )
- Texas blueweed (Helianthus ciliaris )
- Thistle, Italian (Carduus pycnocephalus )
- Thistle, milk (Silybum marianum )
- Thistle, slenderflower (Carduus tenuiflorus )
- Variable-leaf milfoil (Myriophyllum heterophyllum )
- Velvetleaf (Abutilon theophrasti )
- Wild four o'clock (Mirabilis nyctaginea )
Class B Weeds: Non-native species presently limited to portions of the State. Species are designated for control in regions where they are not yet widespread. Preventing new infestations in these areas is a high priority. In regions where a Class B species is already abundant, control is decided at the local level, with containment as the primary goal. Please contact your County Noxious Weed Control Coordinator to learn which species are designated in your area.
- Austrian fieldcress (Rorippa austriaca )
- Blackgrass (Alopecurus myosuroides )
- Blueweed (Echium vulgare )
- Brazilian elodea (Egeria densa )
- Bugloss, annual (Anchusa arvensis )
- Bugloss, common (Anchusa officinalis )
- Butterfly bush (Buddleja davidii )
- Camelthorn (Alhagi maurorum )
- Common catsear (Hypochaeris radicata )
- Common fennel (Foeniculum vulgare )
- Common reed (nonnative genotypes) (Phragmites australis )
- Dalmatian toadflax (Linaria dalmatica ssp. dalmatica )
- Eurasian watermilfoil (Myriophyllum spicatum )
- Fanwort (Cabomba caroliniana )
- Gorse (Ulex europaeus )
- Grass-leaved arrowhead (Sagittaria graminea )
- Hawkweed oxtongue (Picris hieracioides )
- Hawkweed, mouseear (Hieracium pilosella )
- Hawkweed, orange (Hieracium aurantiacum )
- Hawkweed, polar (Hieracium atratum )
- Hawkweed, queen-devil (Hieracium glomeratum )
- Hawkweed, smooth (Hieracium laevigatum )
- Hawkweed, yellow (Hieracium caespitosum )
- Herb-Robert (Geranium robertianum )
- Hoary alyssum (Berteroa incana )
- Houndstongue (Cynoglossum officinale )
- Indigobush (Amorpha fruticosa )
- Knapweed, black (Centaurea nigra )
- Knapweed, brown (Centaurea jacea )
- Knapweed, diffuse (Centaurea diffusa )
- Knapweed, meadow (Centaurea jacea x nigra )
- Knapweed, Russian (Acroptilon repens )
- Knapweed, spotted (Centaurea stoebe )
- Knotweed, Bohemian (Polygonum bohemicum )
- Knotweed, giant (Polygonum sachalinense )
- Knotweed, Himalayan (Polygonum polystachyum )
- Knotweed, Japanese (Polygonum cuspidatum )
- Kochia (Kochia scoparia )
- Lawnweed (Soliva sessilis )
- Lepyrodiclis (Lepyrodiclis holosteoides )
- Longspine sandbur (Cenchrus longispinus )
- Loosestrife, garden (Lysimachia vulgaris )
- Loosestrife, purple (Lythrum salicaria )
- Loosestrife, wand (Lythrum virgatum )
- Oxeye daisy (Leucanthemum vulgare )
- Parrotfeather (Myriophyllum aquaticum )
- Perennial pepperweed (Lepidium latifolium )
- Perennial sowthistle (Sonchus arvensis ssp. arvensis )
- Policeman’s helmet (Impatiens glandulifera )
- Poison-hemlock (Conium maculatum )
- Puncturevine (Tribulus terrestris )
- Rush skeletonweed (Chondrilla juncea )
- Saltcedar (Tamarix ramosissima )
- Scotch broom (Cytisus scoparius )
- Spurge laurel (Daphne laureola )
- Spurge, leafy (Euphorbia esula )
- Spurge, myrtle (Euphorbia myrsinites )
- Sulfur cinquefoil (Potentilla recta )
- Swainsonpea (Sphaerophysa salsula )
- Tansy ragwort (Senecio jacobaea )
- Thistle, musk (Carduus nutans )
- Thistle, plumeless (Carduus acanthoides )
- Thistle, Scotch (Onopordum acanthium )
- Water primrose (Ludwigia hexapetala )
- White bryony (Bryonia alba )
- Wild carrot (Daucus carota )
- Wild chervil (Anthriscus sylvestris )
- Yellow floating heart (Nymphoides peltata )
- Yellow nutsedge (Cyperus esculentus )
- Yellow starthistle (Centaurea solstitialis )
Class C Weeds: Noxious weeds which are already widespread in WA or are of special interest to the state’s agricultural industry. The Class C status allows counties to enforce control if locally desired. Other counties may choose to provide education or technical consultation.
- Absinth wormwood (Artemisia absinthium )
- Babysbreath (Gypsophila paniculata )
- Black henbane (Hyoscyamus niger )
- Cereal rye (Secale cereale )
- Common groundsel (Senecio vulgaris )
- Common St. Johnswort (Hypericum perforatum )
- Common tansy (Tanacetum vulgare )
- Curly-leaf pondweed (Potamogeton crispus )
- English ivy - four cultivars only (Hedera helix 'Baltica’, 'Pittsburgh', and 'Star'; H. hibernica 'Hibernica' )
- Evergreen blackberry (Rubus laciniatus )
- Field bindweed (Convolvulus arvensis )
- Fragrant water lily (Nymphaea odorata )
- Hairy whitetop (Cardaria pubescens )
- Hairy willow-herb (Epilobium hirsutum )
- Hawkweed, common (Hieracium lachenalii )
- Hawkweeds, nonnative and invasive species not listed elsewhere (Hieracium spp. )
- Himalayan blackberry (Rubus armeniacus )
- Hoary cress (Cardaria draba )
- Jointed goatgrass (Aegilops cylindrica )
- Old man's beard (Clematis vitalba )
- Reed canarygrass (Phalaris arundinacea )
- Scentless mayweed (Matricaria perforata )
- Smoothseed alfalfa dodder (Cuscuta approximata )
- Spikeweed (Hemizonia pungens )
- Spiny cocklebur (Xanthium spinosum )
- Thistle, bull (Cirsium vulgare )
- Thistle, Canada (Cirsium arvense )
- White cockle (Silene latifolia ssp. alba )
- Yellow archangel (Lamiastrum galeobdolon )
- Yellow flag iris (Iris pseudacorus )
- Yellow toadflax (Linaria vulgaris )
Back to top
Wyoming
- Canada thistle (Cirsium arvense L)
- Common burdock (Arctium minus (Hill) Bernh.)
- Common St. Johnswort (Hypericum perforatum)
- Common Tansy (Tanacetum vulgare)
- Dalmatian toadflax (Linaria dalmatica (L.) Mill.)
- Diffuse knapweed (Centaurea diffusa Lam)
- Dyers woad (Isatis tinctoria L.)
- Field bindweed (Convolvulus arvensis L.
)
- Hoary cress (whitetop) (Cardaria draba and Cardaria pubescens (L.) Desv.)
- Houndstongue (Cynoglossum officinale L.)
- Leafy spurge (Euphorbia esula L.)
- Musk thistle (Carduus nutans L.)
- Ox-eye daisy (Chrysanthemum leucanthemum L.)
- Perennial pepperweed (giant whitetop) (Lepidium latifolium L.)
- Perennial sowthistle (Sonchus arvensis L.)
- Plumeless thistle (Carduus acanthoides L.)
- Purple loosestrife (Lythrum salicaria L.)
- Quackgrass (Agropyron repens (L.) Beauv.)
- Russian knapweed (Centaurea repens L.)
- Russian olive (Elaeagnus angustifolia L.)
- Saltcedar (Tamarix spp.)
- Scotch thistle (Onopordum acanthium L.)
- Skeletonleaf bursage (Franseria discolor Nutt.)
- Spotted knapweed (Centaurea maculosa Lam.)
- Yellow toadflax (Linaria vulgaris L.)
Back to top
|
