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State and Province Noxious Weed Lists


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Alaska

Updated: 2011
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Prohibited: The following are prohibited noxious weeds.

  • Austrian fieldcress (Rorippa austriaca)
  • Blue-flowering lettuce (Lactuca pulchella)
  • Canada thistle (Cirsium arvense)
  • Field bindweed (Convolvulus arvensis)
  • Galensoga (Galensoga parviflora)
  • Hempnettle (Galeopsis tetrahit)
  • Horsenettle (Solanum carolinense)
  • Leafy spurge (Euphorbia esula)
  • Orange hawkweed (Hieracium aurantiacum)
  • Perennial sowthistle (Sonchus arvensis)
  • Purple loosestrife (Lythrum salicaria)
  • Quackgrass (Elymus repens)
  • Russian knapweed (Acroptilon repens)
  • Whitetop and its varieties (Cardaria draba, C. pubescens, Lepidium latifolium)

Restricted: The following are restricted noxious weeds in Alaska.

  • Annual bluegrass (Poa annua)
  • Blue burr (Lappula echinata)
  • Buckhorn plantain (Plantago spp.)
  • Mustard (Brassica juncea, Sinapis arvensis)
  • Radish (Raphanus raphanistrum)
  • Tufted vetch (Vicia cracca)
  • Wild buckwheat (Polygonum convolvulus)
  • Wild oats (Avena fatua)
  • Yellow toadflax (Linaria vulgaris)



Alberta

Updated: 2010
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Prohibited Noxious Weeds: 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)
  • Bighead knapweed (Centaurea macrocephala)
  • Black knapweed (Centaurea nigra)
  • Brown knapweed (Centaurea jacea)
  • Chinese tamarisk (Tamarix chinensis)
  • Common barberry (Berberis vulgaris)
  • Common buckthorn (Rhamnus cathartica)
  • Common crupina (Crupina vulgaris)
  • Diffuse knapweed (Centaurea diffusa)
  • Dyer's woad (Isatis tinctoria)
  • Eurasian watermilfoil (Myriophyllum spicatum)
  • Flowering rush (Butomus umbellatus)
  • Garlic mustard (Alliaria petiolata)
  • Giant hogweed (Heracleum mantegazzianum)
  • Giant knotweed (Fallopia sachalinensis)
  • Himalayan balsam (Impatiens glandulifera)
  • Hoary alyssum (Berteroa incana)
  • Japanese knotweed (Fallopia japonica)
  • Japanese knotweed hybrid (Fallopia × bohemica)
  • Jointed goatgrass (Aegilops cylindrica)
  • Knapweed hybrid (Centaurea × psammogena)
  • Marsh thistle (Cirsium palustre)
  • Meadow hawkweed (Hieracium caespitosum)
  • Meadow knapweed (Centaurea × moncktonii)
  • Medusahead (Taeniatherum caput-medusae)
  • Mouse-ear hawkweed (Hieracium pilosella)
  • Nodding thistle (Carduus nutans)
  • Orange hawkweed (Hieracium aurantiacum)
  • Pale yellow iris (Iris pseudacorus)
  • Plumeless thistle (Carduus acanthoides)
  • Puncturevine (Tribulus terrestris)
  • Purple loosestrife (Lythrum salicaria)
  • Red bartsia (Odontites vernus)
  • Rush skeletonweed (Chondrilla juncea)
  • Russian knapweed (Rhaponticum repens)
  • Saltcedar (Tamarix ramosissima)
  • Saltlover (Halogeton glomeratus)
  • Smallflower tamarisk (Tamarix parviflora)
  • Spotted knapweed (Centaurea stoebe spp. micranthos)
  • Squarrose knapweed (Centaurea virgata spp. squarrosa)
  • St. Johnswort (Hypericum perforatum)
  • Sulphur cinquefoil (Potentilla recta)
  • Tansy ragwort (Jacobaea vulgaris)
  • Tyrol knapweed (Centaurea nigrescens)
  • Yellow nutsedge (Cyperus esculentus)
  • Yellow starthistle (Centaurea solstitialis)

Noxious weeds: 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.

  • Black henbane (Hyoscyamus niger)
  • Blueweed (Echium vulgare)
  • Broad-leaved peppergrass (Lepidium latifolium)
  • Canada thistle (Cirsium arvense)
  • Common baby's breath (Gypsophila paniculata)
  • Common mullein (Verbascum thapsus)
  • Common tansy (Tanacetum vulgare)
  • Creeping bellflower (Campanula rapunculoides)
  • Dalmatian toadflax (Linaria dalmatica)
  • Dame's rocket (Hesperis matronalis)
  • Downy brome (Bromus tectorum)
  • Field bindweed (Convolvulus arvensis)
  • Field scabious (Knautia arvensis)
  • Globe-podded hoary cress (Lepidium appelianum)
  • Great burdock (Arctium lappa)
  • Heart-podded hoary cress (Lepidium draba)
  • Houndstongue (Cynoglossum officinale)
  • Japanese brome (Bromus japonicus)
  • Leafy spurge (Euphorbia esula)
  • Lens-podded hoary cress (Lepidium chalepense)
  • Lesser burdock (Arctium minus)
  • Oxeye daisy (Leucanthemum vulgare)
  • Perennial sowthistle (Sonchus arvensis)
  • Scentless chamomile (Tripleurospermum inodorum)
  • Tall buttercup (Ranunculus acris)
  • White cockle (Silene latifolia spp. alba)
  • Wooly burdock (Arctium tomentosum)
  • Yellow clematis (Clematis tangutica)
  • Yellow toadflax (Linaria vulgaris)

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Arizona

Updated: 2010
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Prohibited: The following noxious weeds (includes plants, stolons, rhizomes, cuttings, and seed) are prohibited from entry into the state.

  • African rue (Peganum harmala)
  • Alfombrilla (Drymaria arenarioides)
  • Alligator weed (Alternanthera philoxeroides)
  • Anchored water hyacinth (Eichhornia azurea)
  • Austrian fieldcress (Rorippa austriaca)
  • Branched broomrape (Orobanche ramosa)
  • Buffelgrass (Pennisetum ciliare)
  • Burclover (Medicago polymorpha)
  • Camelthorn (Alhagi pseudalhagi)
  • Canada thistle (Cirsium arvense)
  • Carolina horsenettle (Solanum carolinense)
  • Common purslane (Portulaca oleracea)
  • Creeping wartcress (Coronopus squamatus)
  • Dalmatian toadflax (Linaria genistifolia)
  • Diffuse knapweed (Centaurea diffusa)
  • Dodder (Cuscuta spp.)
  • Dudaim melon (Cucumis melo)
  • Dyer's woad (Isatis tinctoria)
  • Field bindweed (Convolvulus arvensis)
  • Field sandbur (Cenchrus incertus)
  • Floating water hyacinth (Eichhornia crassipes)
  • Giant salvina (Salvinia molesta)
  • Globe-podded hoary cress (Cardaria draba)
  • Hairy whitetop (Cardaria pubescens)
  • Halogeton (Halogeton glomeratus)
  • Hydrilla (Hydrilla verticillata)
  • Iberian starthistle (Centaurea iberica)
  • Jointed goatgrass (Aegilops cylindrica)
  • Leafy spurge (Euphorbia esula)
  • Lens-podded hoary cress (Cardaria chalepensis)
  • 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)
  • Plumeless thistle (Carduus acanthoides)
  • Puna grass (Stipa brachychaeta)
  • Puncturevine (Tribulus terrestris)
  • Purple loosestrife (Lythrum salicaria)
  • Purple starthistle (Centaurea calcitrapa)
  • Quackgrass (Elytrigia repens)
  • Rush skeletonweed (Chondrilla juncea)
  • Russian knapweed (Acroptilon repens)
  • Scotch thistle (Onopordum acanthium)
  • Serrated tussock (Nassella trichotoma)
  • Sicilian starthistle (Centaurea sulphurea)
  • Southern sandbur (Cenchrus echinatus)
  • Spotted knapweed (Centaurea maculosa)
  • Squarrose knapweed (Centaurea squarrosa)
  • Tansy ragwort (Senecio jacobaea)
  • Texas blueweed (Helianthus ciliaris)
  • Three-lobed morning glory (Ipomoea triloba)
  • Torpedo grass (Panicum repens)
  • Tropical soda apple (Solanum viarum)
  • Water-chestnut (Trapa natans)
  • Witchweed (Striga spp.)
  • Yellow starthistle (Centaurea solstitialis)

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)
  • Burclover (Medicago polymorpha)
  • Common purslane (Portulaca oleracea)
  • Field bindweed (Convolvulus arvensis)
  • Field sandbur (Cenchrus incertus)
  • Floating water hyacinth (Eichhornia crassipes)
  • Giant salvinia (Salvinia molesta)
  • Puncturevine (Tribulus terrestris)
  • Southern sandbur (Cenchrus echinatus)

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)
  • Dalmatian toadflax (Linaria genistifolia)
  • Diffuse knapweed (Centaurea diffusa)
  • Dodder (Cuscuta spp.)
  • Floating water hyacinth (Eichhornia crassipes)
  • Globe-podded hoary cress (Cardaria draba)
  • Halogeton (Halogeton glomeratus)
  • Jointed goatgrass (Aegilops cylindrica)
  • Quackgrass (Elytrigia repens)
  • Russian knapweed (Acroptilon repens)
  • Scotch thistle (Onopordum acanthium)
  • Spotted knapweed (Centaurea maculosa)
  • Sweet resinbush (Euryops sunbcarnosus spp.)
  • Texas blueweed (Helianthus ciliaris)
  • Three-lobed morning glory (Ipomoea triloba)
  • Yellow starthistle (Centaurea solstitialis)

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British Columbia

Updated: 2011
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Noxious Weeds (Provincial):

  • Annual sowthistle (Sonchus oleraceus)
  • Canada thistle (Cirsium arvense)
  • Crupina (Crupina vulgaris)
  • Dalmatian toadflax (Linaria dalmatica)
  • Diffuse knapweed (Centaurea diffusa)
  • Dodder (Cuscuta spp.)
  • Gorse (Ulex europaeus)
  • Houndstongue (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)

Noxious Weeds (Regional):

  • Blueweed (Echium vulgare)
  • Burdock (Arctium spp.)
  • Cleavers (Arctium spp.)
  • Common bugloss (Anchusa officinalis)
  • Common tansy (Tanacetum vulgare)
  • Field scabious (Knautia arvensis)
  • Green foxtail (Setaria viridis)
  • Hoary alyssum (Berteroa incana)
  • Hoary cress (Cardaria spp.)
  • Kochia (Kochia scoparia)
  • Marsh plume thistle (Cirsium palustre)
  • Meadow knapweed (Centaurea pratensis)
  • Night-flowering catchfly (Silene noctiflora)
  • Orange hawkweed (Hieracium aurantiacum)
  • Oxeye daisy (Chrysanthemum leucanthemum)
  • Perennial pepperweed (Lepidium latifolium)
  • Plumeless thistle (Carduus acanthoides)
  • Puncturevine (Tribulus terrestris)
  • Purple loosestrife (Lythrum salicaria)
  • Quackgrass (Agropyron repens)
  • Russian knapweed (Acroptilon repens)
  • Russian thistle (Salsola kali)
  • Scotch thistle (Onopordum acanthium)
  • Sulphur cinquefoil (Potentilla recta)
  • Tartary buckwheat (Fagopyrum tataricum)
  • White cockle (Lychnis alba)
  • Wild chervil (Anthriscus sylvestris)
  • Wild mustard (Sinapsis arvensis)

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California

Updated: 2010
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Noxious Weeds:

  • Alligatorweed (Alternanthera philoxeroides)
  • Artichoke thistle (Cynara cardunculus)
  • Austrian fieldcress (Rorippa austriaca)
  • Austrian peaweed (Sphaerophysa salsula)
  • Banana waterlily (Nymphaea mexicana)
  • Barb goatgrass (Aegilops triuncialis)
  • Barbwire Russian thistle (Salsola paulsenii)
  • Bearded creeper (Crupina vulgaris)
  • Biddy biddy (Acaena anserinifolia, A. novae-zelandiae, A. 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 Russian thistle (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, C. tenuiflorus)
  • Japanese knotweed (Polygonum cuspidatum)
  • Johnsongrass and other perennial Sorghum spp. (including but not limited to: Sorghum almum, S. 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)
  • Saltcedar (Tamarix chinensis, T. gallica, T. parviflora, T. 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)
  • Yellow spinethistle (Cirsium ochrocentrum)

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Colorado

Updated: 2011
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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 (Linaria dalmatica, L. 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, T. ramosissima)
  • Scentless chamomile (Matricaria perforata)
  • Scotch thistle (Onopordum acanthium, O. tauricum)
  • Spotted knapweed (Centaurea maculosa)
  • Spurred anoda (Anoda cristata)
  • Sulphur 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)

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Hawaii

Updated: 1992
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List of Plant Species Designated as Noxious Weeds for Eradication or Control Purposes by the Hawaii Department of Agriculture, June 18, 1992.

  • Acuate (Lagascea mollis)
  • Banana passionfruit, banana poka (Passiflora mollissima)
  • Barbwire grass (Cymbopogon refractus)
  • Black wattle (Acacia mearnsii)
  • Broomsedge (Andropogon virginicus)
  • Canada thistle (Cirsium arvense)
  • Climbing hempweed (Mikania scandens)
  • Cogongrass (Imperata cylindrica)
  • Comb hyptis (Hyptis pectinata)
  • Cortaderia jubata
  • Croftonweed, Maui pamakani (Ageratina riparia)
  • Downy rosemyrtle (Rhodomyrtus tomentosa)
  • Elephantopus, elephant's foot (Elephantopus mollis)
  • Field bindweed (Convolvulus arvensis)
  • Firetree, candleberry myrtle (Myrica faya)
  • Fireweed (Senecio madagascariensis)
  • Fountaingrass (Pennisetum setaceum)
  • French broom (Cytisus monspessulanus)
  • Giant salvinia, African payal, aquarium water-moss, kariba weed, salvinia (Salvinia molesta)
  • Giant sensitive plant (Mimosa invisa)
  • Hairy whitetop (Cardaria pubescens)
  • Halogeton (Halogeton glomeratus)
  • Hill raspberry (Rubus niveus)
  • Horsenettle (Solanum carolinense)
  • Kahiliflower, Bank's grevillea (Grevillea banksii)
  • Kat sola, Indian jointvetch (Aeschynomene indica)
  • Koster's curse, curse ivy gourd (Clidemia hirta var. hirta)
  • Leafy spurge (Euphorbia esula)
  • Lyon's grass (Themeda villosa)
  • Madeira vine (Anredera cordifolia)
  • Malachra (Malachra venosa)
  • Marabu (Dichrostachys nutans)
  • Medinilla venosa
  • Melastoma (Melastoma spp.)
  • Miconia (Miconia spp.)
  • Mile-a-minute weed (Mikania micanthra)
  • Miscanthus, Japanese silvergrass (Miscanthus floridulus)
  • Molucca raspberry (Rubus sieboldii)
  • Moon cactus (Eriocerus martinii)
  • Nasella tussock (Stipa trichotoma)
  • New Zealand bur, piripiri (Acaena novae-zelandiae)
  • Nile cabbage, tropical duckweed, water cabbage, water lettuce (Pistia stratiotes)
  • Oxyspora paniculata
  • Perennial pepperweed (Lepidium latifolium)
  • Perennial sowthistle (Sonchus arvensis)
  • Plume poppy (Bocconia frutescens)
  • Prickly Florida blackberry (Rubus argutus)
  • Prosopis juliflora
  • Quackgrass (Elytrigia repens)
  • Russian knapweed (Acroptilon repens)
  • Russian thistle (Salsola kali)
  • Scotch broom (Cytisus scoparius)
  • Shoebutton ardisia (Ardisia elliptica)
  • Siamweed, bitterbrush (Chromolaena odorata)
  • Silverleaf nightshade (Solanum elaeagnifolium)
  • Solanum robustum
  • Spanish broom (Spartium junceum)
  • Spiked pepper (Piper aduncum)
  • Spiny emex (Emex spinosa)
  • Spiny tree cactus, Peruvian apple (Cereus uruguayanus)
  • Thorny sensitive plant (Mimosa pigra)
  • Tibouchina (Tibouchina spp.)
  • Torpedograss (Panicum repens)
  • Tree daisy (Montanoa hibiscifolia)
  • Tropical kudzu (Pueraria phaseoloides)
  • Turkeyberry, terongan (Solanum torvum)
  • Victorian box (Pittosporum undulatum)
  • Water fern (Salvinia minima)
  • West Indian foxtail (Andropogon bicornis)
  • Wild garlic (Allium vineale)
  • Wild spikenard (Hyptis suaveolens)
  • Wingleaf passionfruit (Passiflora pulchella)
  • Witchweeds (Striga spp.)
  • Yellow Himalayan raspberry (Rubus ellipticus var. obcordatus)
  • Yellow nutsedge (Cyperus esculentus)

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Idaho

Updated: 2011
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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 frogbit, 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 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)
  • Viper's bugloss (Echium vulgare)
  • Yellow hawkweed (Hieracium caespitosum)

Statewide Containment List:

  • Canada thistle (Cirsium arvense)
  • Curlyleaf pondweed (Potamogeton crispus)
  • Dalmatian toadflax (Linaria dalmatica spp. dalmatica)
  • Diffuse knapweed(Centaurea diffusa)
  • Field bindweed (Convolvulus arvensis)
  • Flowering rush (Butomus umbellatus)
  • 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 spp.)
  • 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)


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Kansas

Updated: 2007
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Noxious Weeds: 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 thistle, 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.

  • All federal noxious weeds
  • Grecian foxglove (Digitalis lanata)
  • Karnal bunt (Tilletia indica)
  • Purple loosestrife (all species and hybrids of Lythrum except: Lythrum alatum, L. californicum)

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Minnesota

Updated: 2012
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Eradicate List: Prohibited noxious weeds that are listed to be eradicated are plants that are not currently known to be present in Minnesota or are not widely established. These species must be eradicated, meaning all of the above and below ground parts of the plant must be destroyed, as required by Minnesota Statutes, Section 18.78. Additionally, no transportation, propagation, or sale of these plants is allowed. Measures must also be taken to prevent and exclude these species from being introduced into Minnesota.

  • Common teasel (Dipsacus fullonum)
  • Cut-leaved teasel (Dipsacus laciniatus)
  • Dalmatian toadflax (Linaria dalmatica)
  • Giant hogweed (Heracleum Mantegazzianum Sommier and Levier)
  • Grecian foxglove (Digitalis lanata)
  • Japanese hops (Humulus japonicas Siebold and Zucc.)
  • Oriental bittersweet (Celastrus orbiculatus)
  • Yellow starthistle (Centurea solstitialis)

Controlled List: Prohibited noxious weeds listed to be controlled are plants established throughout Minnesota or regions of the state. Species on this list must be controlled, meaning efforts must be made to prevent the spread, maturation and dispersal of any propagating parts, thereby reducing established populations and preventing reproduction and spread as required by Minnesota Statutes, Section 18.78. Additionally, transportation, propagation, or sale of these plants is prohibited.

  • Canada thistle (Cirsium arvense)
  • Common tansy (Tanacetum vulgare L.)
  • Garlic mustard (Alliaria petiolata, Bieb.)
  • Leafy spurge (Euphorbia esula L.)
  • Musk thistle (Carduus nutans L.)
  • Narrowleaf bittercress (Cardamine impatiens L.)
  • Plumeless thistle (Carduus acanthoides L.)
  • Purple loosestrife (Lythrum salicaria, virgatum L.)
  • Spotted knapweed (Centaurea stoebe spp. micranthos)
  • Wild parsnip (Pastinaca sativa L.)

Restricted Noxious Weeds: Restricted noxious weeds are plants that are widely distributed in Minnesota and are detrimental to human or animal health, the environment, public roads, crops, livestock or other property, but whose only feasible means of control is to prevent their spread by prohibiting the importation, sale, and transportation of their propagating parts in the state except as allowed by Minnesota Statutes, Section 18.82. Plants designated as Restricted Noxious Weeds may be reclassified if effective means of control are developed.

  • Common buckthorn, European buckthorn (Rhamnus cathartica)
  • Glossy buckthorn (Rhamnus frangula, including: columnaris, tallcole, asplenifolia, and all other cultivars)
  • Multiflora Rose (Rosa multiflora Thunb.)

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Montana

Updated: 2010
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Priority 1a: These weeds are not present in Montana. Management criteria will require eradication, and education and prevention efforts if detected.

  • Yellow starthistle (Centaurea solstitialis)

Priority 1b: These weeds have limited presence in Montana. Management criteria will require eradication or containment and education.

  • Curlyleaf pondweed (Potamogeton crispus)
  • Dyer's woad (Isatis tinctoria)
  • Eurasian watermilfoil (Myriophyllum spicatum)
  • Flowering rush (Butomus umbellatus)
  • Japanese knotweed complex (Polygonum spp.)
  • Purple loosestrife (Lythrum spp.)
  • Rush skeletonweed (Chrondrilla juncea)
  • Scotch broom (Cytisus scoparius)

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.

  • Blueweed (Echium vulgare)
  • Hoary alyssum (Berteroa incana)
  • Meadow hawkweed complex (Hieracium spp.)
  • Orange hawkweed (Hieracium aurantiacum)
  • Perennial pepperweed (Lepidium latifolium)
  • Tall buttercup (Ranunculus acris)
  • Tansy ragwort (Senecio jacobea)
  • Yellowflag iris (Iris pseudacorus)

Priority 2b: These weeds are abundant in Montana and widespread in many countries. Management criteria will require eradication or containment where less abundant. Management shall be prioritized by local weed districts.

  • Canada thistle (Cirsium arvense)
  • Common tansy (Tanacetum vulgare)
  • Dalmatian toadflax (Linaria dalmatica)
  • Diffuse knapweed (Centaurea diffusa)
  • Field bindweed (Convolvulus arvensis)
  • Houndstongue (Cynoglossum officinale)
  • Leafy spurge (Euphorbia esula)
  • Oxeye daisy (Chrysanthemum leucanthemum)
  • Russian knapweed (Centaurea repens)
  • Saltcedar (Tamarix spp.)
  • Spotted knapweed (Centauria stoebe, C. maculosa)
  • St. Johnswort (Hypericum perforatum)
  • Sulphur cinquefoil (Potentilla recta)
  • Whitetop (Cardaria draba)
  • Yellow toadflax (Linaria vulgaris)

Priority 3: Regulated Plants (not Montana listed noxious weeds) have the potential to cause 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)
  • Russian olive (Elaeagnus angustifolia)

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Nebraska

Updated: 2009
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Noxious weeds:

  • 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)

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Nevada

Updated: 2011
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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)
  • Goatsrue (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)
  • Sowthistle (Sonchus arvensis)
  • Spotted knapweed (Centaurea maculosa)
  • Squarrose starthistle (Centaurea virgata var. squarrosa)
  • Sulphur cinquefoil (Potentilla recta)
  • Syrian beancaper (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 horsenettle (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 horsenettle (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)

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New Mexico

Updated: 2009
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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)
  • Dalmatian 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)
  • Poison hemlock (Conium maculatum)
  • Russian knapweed (Acroptilon repens)
  • 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: These species are of concern in the state and 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)

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North Dakota

Updated: 2011
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Noxious Weeds: Weeds declared "noxious" are those that are difficult to control, easily spread, and injurious to public health, crops, livestock, land, or other property.

  • 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)

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Oregon

Updated: 2011
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Class A Designated Weeds: Weeds of known economic importance which occur in the state in small enough infestations to make eradication or containment possible; or are not known to occur, but their presence in neighboring states make future occurrences in Oregon seem imminent. Recommended action: infestations are subject to eradication or intensive control when and where found.

  • African rue (Peganum harmala)
  • Barbed goatgrass (Aegilops triuncialis)
  • Camelthorn (Alhagi pseudalhagi)
  • Coltsfoot (Tussilago farfara)
  • Common cordgrass (Spartina anglica)
  • Common reed (Phragmites australis)
  • Dense-flowered cordgrass (Spartina densiflora)
  • European water chestnut (Trapa natans)
  • Flowering rush (Butomus umbellatus)
  • Giant hogweed (Heracleum mantegazzianum)
  • Goatsrue (Galega officinalis)
  • Hydrilla (Hydrilla verticillata)
  • Iberian starthistle (Centaurea iberica)
  • Japanese dodder (Cuscuta japonica)
  • King-devil hawkweed (Hieracium piloselloides)
  • Kudzu (Pueraria lobata)
  • Matgrass (Nardus stricta)
  • Meadow hawkweed (Hieracium pratense)
  • Mouse-ear hawkweed (Hieracium pilosella)
  • Oblong spurge (Euphorbia oblongata)
  • Orange hawkweed (Hieracium aurantiacum)
  • Ovate goatgrass (Aegilops ovata)
  • Paterson's curse (Echium plantagineum)
  • Plumeless thistle (Carduus acanthoides)
  • Purple starthistle (Centaurea calcitrapa)
  • Saltmeadow cordgrass (Spartina patens)
  • Silverleaf nightshade (Solanum elaeagnifolium)
  • Smooth cordgrass (Spartina alterniflora)
  • Smooth distaff thistle (Carthamus baeticus)
  • Squarrose knapweed (Centaurea virgata)
  • Syrian beancaper (Zygophyllum fabago)
  • Taurian thistle (Onopordum tauricum)
  • White bryonia (Bryonia alba)
  • Wooly distaff thistle (Carthamus lanatus)
  • Yellow floating heart (Nymphoides peltata)
  • Yellow hawkweed (Hieracium floribundum)
  • Yellowtuft (Alyssum murale, A. corsicum)

 

Class B Designated Weeds: Weeds of economic importance which are 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 blackberry, Himalayan blackberry (Rubus armeniacus, R. procerus, R. discolor)
  • Biddy biddy (Acaena novae-zelandiae)
  • Buffalobur (Solanum rostratum)
  • Bull thistle (Cirsium vulgare)
  • Butterfly bush (Buddleja davidii, B. variabilis)
  • Canada thistle (Cirsium arvense)
  • Common bugloss (Anchusa officinalis)
  • Common crupina (Crupina vulgaris)
  • Creeping yellow cress (Rorippa sylvestris)
  • Cutleaf teasel (Dipsacus laciniatus)
  • Dalmatian toadflax (Linaria dalmatica)
  • Diffuse knapweed (Centaurea diffusa)
  • Dodder (Cuscuta spp.)
  • Dyer's woad (Isatis tinctoria)
  • English ivy (Hedera helix, H. hibernica)
  • Eurasian watermilfoil (Myriophyllum spicatum)
  • False brome (Brachypodium sylvaticum)
  • Field bindweed (Convolvulus arvensis)
  • French broom (Genista monspessulana)
  • Garlic mustard (Alliaria petiolata)
  • Giant knotweed (Fallopia sachalinensis, Polygonum sachalinense)
  • Gorse (Ulex europaeus)
  • Hairy whitetop (Lepidium pubescens)
  • Halogeton (Halogeton glomeratus)
  • Herb Robert geranium (Geranium robertianum)
  • Himalayan knotweed (Polygonum polystachyum)
  • Houndstongue (Cynoglossum officinale)
  • Italian thistle (Carduus pycnocephalus)
  • Japanese knotweed (Fallopia japonica, Polygonum cuspidatum)
  • Johnsongrass (Sorghum halepense)
  • Jointed goatgrass (Aegilops cylindrica)
  • Jubata grass (Cortaderia jubata)
  • Kochia (Kochia scoparia)
  • Laurel spurge (Daphne laureola)
  • Leafy spurge (Euphorbia esula)
  • Lens-podded whitetop (Lepidium chalepensis)
  • Lesser celandine (Ranunculus ficaria)
  • Meadow knapweed (Centaurea pratensis)
  • Mediterranean sage (Salvia aethiopis)
  • Medusahead rye (Taeniatherum caput-medusae)
  • Musk thistle (Carduus nutans)
  • Myrtle spurge (Euphorbia myrsinites)
  • 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)
  • Portugese broom (Cytisus striatus)
  • Puncturevine (Tribulus terrestris)
  • Purple loosestrife (Lythrum salicaria)
  • Ragweed (Ambrosia artemisiifolia)
  • Rush skeletonweed (Chondrilla juncea)
  • Russian knapweed (Acroptilon repens)
  • Saltcedar (Tamarix ramosissima)
  • Scotch Broom (Cytisus scoparius)
  • Scotch thistle (Onopordum acanthium)
  • Shiny leaf geranium (Geranium lucidum)
  • Slender-flowered thistle (Carduus tenuiflorus)
  • Small broomrape (Orabanche minor)
  • South American waterweed (Egeria densa, Elodea densa)
  • Spanish broom (Spartium junceum)
  • Spanish heath (Erica lusitanica)
  • Spikeweed (Hemizonia pungens)
  • Spiny cocklebur (Xanthium spinosum)
  • Spotted knapweed (Centaurea stoebe, C. maculosa)
  • St. Johnswort (Hypericum perforatum)
  • Sulphur cinquefoil (Potentilla recta)
  • Swainsonpea (Sphaerophysa salsula)
  • Tansy ragwort (Senecio jacobaea)
  • Velvetleaf (Abutilon theophrasti)
  • Water primrose (Ludwigia peploides, L. hexapetala, L. grandiflora)
  • Whitetop, hoary cress (Lepidium draba)
  • Yellowflag iris (Iris pseudacorus)
  • Yellow nutsedge (Cyperus esculentus)
  • Yellow starthistle (Centaurea solstitialis)
  • Yellow toadflax (Linaria vulgaris)

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Saskatchewan

Updated: 2010
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Schedule 1 (Prohibited Weeds):

  • African rue (Peganum harmala)
  • Common barberry (Berberis vulgaris)
  • Common crupina (Crupina vulgaris)
  • Curlyleaf pondweed (Potamogeton crispus)
  • Dalmatian toadflax (Linaria dalmatica)
  • Darnel (Lolium temulentum)
  • Diffuse knapweed (Centaurea diffusa)
  • Eurasian watermilfoil (Myriophyllum spicatum)
  • Field scabious (Knautia arvensis)
  • Flowering rush (Butomus umbellatus)
  • Garlic mustard (Allaria petiolata)
  • Giant foxtail (Setaria faberi)
  • Giant hogweed (Heracleum mantegazzianum)
  • Halogeton (Halogeton glomeratus)
  • Houndstongue (Cynoglossum officinale)
  • Jointed goatgrass (Aegilops cylindrical)
  • Perennial pepperweed (Lepidium latifolium)
  • Poison hemlock (Conium maculatum)
  • Puncturevine (Tribulus terrestris)
  • Red bartsia (Odontites serotina)
  • Saltcedar (Tamarix spp.)
  • Spotted knapweed (Centaurea stobe)
  • Squarrose knapweed (Centaurea virgata)
  • Wild chevril (Anthriscus sylvestris)
  • Wooly cupgrass (Eriochloa villosa)
  • Yellow floating heart (Nymphoides peltata)
  • Yellow starthistle (Centaurea solstitialis)

Schedule II (Noxious Weeds):

  • Absinthe wormwood (Artemisium absinthum)
  • Annual sowthistle (Sonchus oleracea)
  • Baby's breath (Gypsophila paniculata)
  • Black henbane (Hyoscyamus niger)
  • Bladder campion (Silene vulgaris)
  • Bull thistle (Cirsium vulgare)
  • Canada thistle (Cirsium arvense)
  • Cleavers (Galium aparine)
  • Common burdock (Arctium minus)
  • Common tansy (Tanacetum vulgare)
  • Cypress spurge (Euphorbia cyparissias)
  • Dame's rocket (Hesperis matronalis)
  • Downy brome (Bromus tectorum)
  • European buckthorn (Rhamnus cathartica)
  • False cleavers (Galium spurium)
  • Field bindweed (Convolvulus arvensis)
  • Hoary alyssum (Beretoa incana)
  • Hoary cress (Cardaria spp.)
  • Japanese brome (Bromus japonicas)
  • Kochia (Kochia scoparia)
  • Leafy spurge (Euphorbia esula)
  • Narrow-leaved hawk's beard (Crepis tectorum)
  • Nightflowering catchfly (Silene noctiflora)
  • Nodding thistle (Carduus nutans)
  • Oxeye daisy (Leucanthemum vulgare)
  • Perennial sowthistle (Sonchus arvensis)
  • Persian darnel (Lolium persicum)
  • Prickly lettuce (Lactuca seriola)
  • Purple loosestrife (Lythrum spp.)
  • Round-leaved mallow (Malva pusilla)
  • Russian knapweed (Acroptilon repens)
  • Scentless chamomile (Matricaria perforata, Tripleurospermum perforatum)
  • Spiny annual sowthistle (Sonchus asper)
  • Stork's bill (Erodium cicutarium)
  • White cockle (Silene alba)
  • Wild parsnip (Pastinaca sativa)
  • Yellow toadflax (Linaria vulgaris)

Schedule III (Nuisance Weeds):

  • Blue lettuce (Lactuca tatarica)
  • Dandelion (Taraxacum officinale)
  • Foxtail barley (Hordeum jubatum)
  • Meadow goatsbeard (Tragopogon pratensis)
  • Povertyweed (Iva axillaris)
  • Quackgrass (Elytrigia repens)
  • Russian thistle (Salsola kali)

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South Dakota

Updated: 2011
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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, whitetop (Cardaria draba)
  • Leafy spurge (Euphorbia esula)
  • Perennial sowthistle (Sonchus arvensis)
  • Purple loosestrife (Lythrum salicaria)
  • Russian knapweed (Centaurea repens)
  • Saltcedar (Tamarix aphylla, T. chinensis, T. gallica, T. parviflora, T. ramosissima)

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Utah

Updated: 2010
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Class A: "Early Detection and Rapid Response (EDRR)" declared noxious weeds are those that are not native to the state of Utah, pose a serious threat to the state, and should be considered a very high priority.

  • Black henbane (Hyoscyamus niger)
  • Diffuse knapweed (Centaurea diffusa)
  • Leafy spurge (Euphorbia esula)
  • Medusahead (Taeniatherum caput-medusae)
  • Oxeye daisy (Chrysanthemum leucanthemum)
  • Perennial sorghum, Johnsongrass (Sorghum halepense spp., S. almum)
  • Purple loosestrife (Lythrum salicaria)
  • Spotted knapweed (Centaurea maculosa)
  • Squarrose knapweed (Centaurea squarrosa)
  • St. Johnswort (Hypericum perforatum)
  • Sulphur cinquefoil (Potentilla recta)
  • Yellow starthistle (Centaurea solstitialis)
  • Yellow toadflax (Linaria vulgaris)

Class B: "Control" declared noxious weeds are not native to the state of Utah, pose a threat to the state, and should be considered a high priority for control.

  • Bermudagrass (Cynodon dactylon)
  • Broad-leaved peppergrass, tall whitetop (Lepidium latifolium)
  • Dalmatian toadflax (Linaria dalmatica)
  • Dyer's woad (Isatis tinctoria)
  • Hoary cress (Cardaria spp.)
  • Musk thistle (Carduus nutans)
  • Poison hemlock (Conium maculatum)
  • Russian knapweed (Centaurea repens)
  • Scotch thistle, cotton thistle (Onopordium acanthium)
  • Squarrose knapweed (Centaurea virgata)

Class C: "Containment" declared noxious weeds are not native to the state of Utah and are widely spread, but pose a threat to the agricultural industry and agricultural products, and the focus is on stopping expansion.

  • Canada thistle (Cirsium arvense)
  • Field bindweed, wild morning-glory (Convolvulus spp.)
  • Houndstongue (Cynoglossum officianale)
  • Quackgrass (Agropyron repens)
  • Saltcedar (Tamarix ramosissima)

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Washington

Updated: 2011
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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.

  • Bighead knapweed (Centaurea macrocephala)
  • Buffalobur (Solanum rostratum)
  • Clary sage (Salvia sclarea)
  • Common cordgrass (Spartina anglica)
  • Common crupina (Crupina vulgaris)
  • Dense-flower cordgrass (Spartina densiflora)
  • Dyer's woad (Isatis tinctoria)
  • Eggleaf spurge (Euphorbia oblongata)
  • European hawkweed (Hieracium sabaudum)
  • False brome (Brachypodium sylvaticum)
  • Fllowering rush (Butomus umbellatus)
  • Floating primrose-willow (Ludwigia peploides)
  • Garlic mustard (Alliaria petiolata)
  • Giant hogweed (Heracleum mantegazzianum)
  • Goatsrue (Galega officinalis)
  • Hydrilla (Hydrilla verticillata)
  • Italian thistle (Carduus pycnocephalus)
  • Johnsongrass (Sorghum halepense)
  • Kudzu (Pueraria montana var. lobata)
  • Meadow clary (Salvia pratensis)
  • Mediterranean sage (Salvia aethiopis)
  • Milk thistle (Silybum marianum)
  • Purple starthistle (Centaurea calcitrapa)
  • Reed sweetgrass (Glyceria maxima)
  • Ricefield bulrush (Schoenoplectus mucronatus)
  • Salt meadow cordgrass (Spartina patens)
  • Shiny geranium (Geranium lucidum)
  • Silver-leaf nightshade (Solanum elaeagnifolium)
  • Slender-flower thistle (Carduus tenuiflorus)
  • Smooth cordgrass (Spartina alterniflora)
  • Spanish broom (Spartium junceum)
  • Spurge flax (Thymelaea passerina)
  • Syrian beancaper (Zygophyllum fabago)
  • Texas blueweed (Helianthus ciliaris)
  • Variable-leaf milfoil (Myriophyllum heterophyllum)
  • Velvetleaf (Abutilon theophrasti)
  • Vochin knapweed (Centaurea nigrescens)
  • Wild four o'clock (Mirabilis nyctaginea)
  • Yellow devil hawkweed (Hieracium floribundum)

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.

  • Annual bugloss (Anchusa arvensis)
  • Austrian fieldcress (Rorippa austriaca)
  • Black knapweed (Centaurea nigra)
  • Blackgrass (Alopecurus myosuroides)
  • Blueweed (Echium vulgare)
  • Bohemian knotweed (Polygonum bohemicum)
  • Brazilian elodea (Egeria densa)
  • Brown knapweed (Centaurea jacea)
  • Butterfly bush (Buddleja davidii)
  • Camelthorn (Alhagi maurorum)
  • Common bugloss (Anchusa officinalis)
  • Common catsear (Hypochaeris radicata)
  • Common fennel (Foeniculum vulgare)
  • Common reed (Phragmites australis, nonnative genotypes)
  • Dalmatian toadflax (Linaria dalmatica spp. dalmatica)
  • Diffuse knapweed (Centaurea diffusa)
  • Eurasian watermilfoil (Myriophyllum spicatum)
  • Fanwort (Cabomba caroliniana)
  • Garden loosestrife (Lysimachia vulgaris)
  • Giant knotweed (Polygonum sachalinense)
  • Gorse (Ulex europaeus)
  • Grass-leaved arrowhead (Sagittaria graminea)
  • Hairy willow-herb (Epilobium hirsutum)
  • Herb-Robert (Geranium robertianum)
  • Himalayan knotweed (Polygonum polystachyum)
  • Hoary alyssum (Berteroa incana)
  • Houndstongue (Cynoglossum officinale)
  • Indigobush (Amorpha fruticosa)
  • Japanese knotweed (Polygonum cuspidatum)
  • Kochia (Kochia scoparia)
  • Laurel spurge (Daphne laureola)
  • Lawnweed (Soliva sessilis)
  • Leafy spurge (Euphorbia esula)
  • Lepyrodiclis (Lepyrodiclis holosteoides)
  • Longspine sandbur (Cenchrus longispinus)
  • Meadow knapweed (Centaurea jacea × nigra)
  • Mouse-ear hawkweed (Hieracium pilosella)
  • Musk thistle (Carduus nutans)
  • Myrtle spurge (Euphorbia myrsinites)
  • Orange hawkweed (Hieracium aurantiacum)
  • Oxeye daisy (Leucanthemum vulgare)
  • Oxtongue hawkweed (Picris hieracioides)
  • Parrotfeather (Myriophyllum aquaticum)
  • Perennial pepperweed (Lepidium latifolium)
  • Perennial sowthistle (Sonchus arvensis spp. arvensis)
  • Plumeless thistle (Carduus acanthoides)
  • Poison hemlock (Conium maculatum)
  • Polar hawkweed (Hieracium atratum)
  • Policeman's helmet (Impatiens glandulifera)
  • Puncturevine (Tribulus terrestris)
  • Purple loosestrife (Lythrum salicaria)
  • Queen-devil hawkweed (Hieracium glomeratum)
  • Rush skeletonweed (Chondrilla juncea)
  • Russian knapweed (Acroptilon repens)
  • Saltcedar (Tamarix ramosissima)
  • Scotch broom (Cytisus scoparius)
  • Scotch thistle (Onopordum acanthium)
  • Smooth hawkweed (Hieracium laevigatum)
  • Spotted knapweed (Centaurea stoebe)
  • Sulfur cinquefoil (Potentilla recta)
  • Swainsonpea (Sphaerophysa salsula)
  • Tansy ragwort (Senecio jacobaea)
  • Wand loosestrife (Lythrum virgatum)
  • Water primrose (Ludwigia hexapetala)
  • White bryony (Bryonia alba)
  • Wild carrot (Daucus carota)
  • Wild chervil (Anthriscus sylvestris)
  • Yellow archangel (Lamiastrum galeobdolon)
  • Yellow floating heart (Nymphoides peltata)
  • Yellow hawkweed (Hieracium caespitosum)
  • Yellow nutsedge (Cyperus esculentus)
  • Yellow starthistle (Centaurea solstitialis)

Class C Weeds: Noxious weeds which are already widespread in Washington or are of special interest to the state's agricultural industry. 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)
  • Baby's breath (Gypsophila paniculata)
  • Black henbane (Hyoscyamus niger)
  • Bull thistle (Cirsium vulgare)
  • Cereal rye (Secale cereale)
  • Common groundsel (Senecio vulgaris)
  • Common hawkweed (Hieracium lachenalii)
  • Common St. Johnswort (Hypericum perforatum)
  • Common tansy (Tanacetum vulgare)
  • Curlyleaf pondweed (Potamogeton crispus)
  • English ivy (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)
  • Hawkweeds (Hieracium spp., nonnative and invasive species not listed elsewhere)
  • 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)
  • White cockle (Silene latifolia spp. alba)
  • Yellowflag iris (Iris pseudacorus)
  • Yellow toadflax (Linaria vulgaris)

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Wyoming

Updated: 2012
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  • Canada thistle (Cirsium arvense)
  • Common burdock (Arctium minus)
  • Common St. Johnswort (Hypericum perforatum)
  • Common tansy (Tanacetum vulgare)
  • Dalmatian toadflax (Linaria dalmatica)
  • Diffuse knapweed (Centaurea diffusa)
  • Dyer's woad (Isatis tinctoria)
  • Field bindweed (Convolvulus arvensis)
  • Hoary cress, whitetop (Cardaria draba, C. pubescens)
  • Houndstongue (Cynoglossum officinale)
  • Leafy spurge (Euphorbia esula)
  • Musk thistle (Carduus nutans)
  • Oxeye daisy (Chrysanthemum leucanthemum)
  • Perennial pepperweed, giant whitetop (Lepidium latifolium)
  • Perennial sowthistle (Sonchus arvensis)
  • Plumeless thistle (Carduus acanthoides)
  • Purple loosestrife (Lythrum salicaria)
  • Quackgrass (Agropyron repens)
  • Russian knapweed (Centaurea repens)
  • Russian olive (Elaeagnus angustifolia)
  • Saltcedar (Tamarix spp.)
  • Scotch thistle (Onopordum acanthium)
  • Skeletonleaf bursage (Franseria discolor)
  • Spotted knapweed (Centaurea maculosa)
  • Yellow toadflax (Linaria vulgaris)

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