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WYOMING
EXTERIOR QUARANTINE SUMMARIES
Updated December 10, 2014
(Reviewed August 2015)
State of Wyoming
Department of Agriculture, Technical Services Division
2219 Carey Avenue
Cheyenne, Wyoming 82002
Phone: (307)-777-7324; Fax: (307) 777-6593
Email: WDA1@state.wy.us
Web Page: http://agriculture.wy.gov
Hank Uhden .................................................................................... Manager of Technical Services
The information, as provided, is for informational purposes only and should not be
interpreted as complete, nor should it be considered legally binding. Coordination with
both your state and the destination state plant regulatory agency listed above may be
necessary to stay up-to-date on revised requirements.
DEFINITION OF NURSERY STOCK
"Nursery Stock" means:
(A) All field-grown, greenhouse-grown or collected wild stock of woody plants such as
fruit, forest, windbreak, shade and ornamental trees, shrubs or vines for fruit production,
ornamental or protective plantings and herbaceous perennials used as ornamentals;
(B) All plants, rooted cuttings and plants with roots attached grown from bulbs, corms,
tubers, rhizomes or other vegetative parts, whether produced out-of-doors or under glass and
whether grown in open ground or in benches, boxes, pots or other containers;
(C) All bulbs, corms, pips, rhizomes, tubers, roots, cuttings, scions, grafts or other
vegetative parts of plants; and
(D) All ground cover, including sod, plugs and vegetative mulches and compost.
GENERAL SHIPPING REQUIREMENTS
(A) No person shall engage in the business of selling, offering for sale or distributing
nursery stock within Wyoming without first obtaining a license from the state department of
agriculture. The fee for a license shall be the fee authorized by W.S. 11-1-104.
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(B) No person shall act as a nursery stock salesman without first securing a license from
the state department of agriculture. The fee for a license shall be the fee authorized by W.S. 11-1104.
(C) No nonresident shall sell, take orders to sell, offer for sale or distribute nursery stock
which has been grown outside this state without first securing a license from the department of
agriculture. The license fee for each establishment shipping nursery stock into Wyoming shall be
the fee authorized by W.S. 11-1-104. No license shall be granted to a nonresident unless the
applicant agrees to furnish with each shipment of nursery stock an affidavit stating that the
nursery stock to be sold, offered for sale or transported into Wyoming has been inspected by the
proper state, district or county officials of the state of origin and found free from injurious
insects, plant diseases and prohibited, restricted, regulated or designated noxious weeds.
(D) Licenses granted to nursery stock dealers or salesmen expire on March 31 of each
year. All license fees collected shall be deposited in the general fund.
(E) Charitable and educational institutions shall be exempt from licensing requirements
imposed by this section.
(F) Any person receiving directly or indirectly any nursery stock which is not
accompanied by a valid shipping inspection certificate shall notify the department of the arrival
of such stock, the kinds and amounts of the stock, and the name of the consignor, and shall hold
the stock until inspected and released by the department.
(G) Public carriers shall not accept for shipment nursery stock that does not bear a proper
affidavit showing apparent freedom from injurious insect, plant diseases, other pests and
prohibited, restricted, regulated or designated noxious weeds.
(H) Any person shipping, selling or distributing nursery stock from out of state shall
furnish with each shipment of nursery stock a plant inspection or health certificate stating that the
nursery stock to be sold, offered for sale or distributed into Wyoming has been inspected and
issued a plant inspection or health certificate by the state of origin.
(I) Resident nursery stock dealers shall request an inspection of any nursery stock to be
shipped out of Wyoming. An annual inspection shall be sufficient for the purposes of this
subsection. The department shall issue a plant inspection or health certificate after inspection by
the department of the premises and nursery stock.
NOXIOUS WEED LIST
COMMON NAME
Prohibited noxious weeds
SCIENTIFIC NAME
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Prohibited Noxious Weeds. No seeds from the following noxious weeds are allowed.
Bindweed, field
Blueweed
Burdock, common
Bursage, skeletonleaf
Camelthorn
Campion, bladder
Crupina common
Daisy, oxeye
Dodder
Goatgrass, jointed
Halogeton
Hawkweed, orange
Hemlock, poison
Henbane, black
Hound’s tongue
Knapweed, black
Knapweed, diffuse
Knapweed, meadow
Knapweed, Russian
Knapweed, spotted
Knapweed, squarose
Loosestrife, purple
Medusa-head
Millet, wild proso
Olive, Russian
Pepperweed, perennial
Puncturevine
Quackgrass
Saltcedar
Salvation jane
Sandbur, field
Sandbur, longspine (mat)
Skeletonweed, rush
Sowthistle, perennial
Spurge, leafy
Starthistle, purple
Starthistle, yellow
Convolvulus arvensis L.
Echium vulgare L.
Arctium minus (Hill) Bernh.
Ambrosia tomentosa Nutt.
Alhagi maurorum Medik.
Silene vulgaris (Moench) Garcke subsp. vulgaris
Crupina vulgaris Cass.
Leucanthemum vulgare Lam.
Cuscuta spp.
Aegilops cylindrical Host
Halogeton glomeratus (M. Bieb.) Ledeb.
Hieracium aurantiacum L.
Conium maculatum L.
Hyoscyamus niger L.
Cynoglossum officinale L.
Centaurea nigra L.
Centaurea diffusa Lam.
Centaurea x moncktonii C. E. Britton
Rhaponticum repens L. Hidalgo
Centaurea stoebe subsp. micranthos (Gugler) Hayek
Centaurea squarrosa Willd.
Lythrum salciaria L.
Taeniatherum caput-medusae (L.) Nevski subsp. caput-medusae
Panicum milliaceum L. subsp. ruderale (Kitag.) Tzvelev
Elaeagnus angustifolia L.
Lepidium latifolium L.
Tribulus terrestris L.
Elymus repens L. Desv. ex Nevski
Tamarix spp.
Echium plantagineum L.
Cenchrus incertus M. A. Curtis
Cenchrus longispinus (Hack.) Fernald
Chondrilla juncea L.
Sonchus arvensis L.
Euphorbia esula L.
Centaurea calcitrapa L.
Centaurea solstitialis L.
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St. Johnswort
Swainsonpea
Tansy, common
Thistle, Canada
Thistle, musk
Thistle, plumeless
Thistle, Scotch
Toadflax, Dalmatian
Toadflax, yellow
Tussock, serrated
Whitetop
Woad, dyers
Hypericum perforatum L.
Sphaerophysa salsula (Pall.) DC.
Tanacetum vulgare L.
Cirsium arvense (L.) Scop.
Carduus nutans L.
Carduus acanthoides L.
Onopordum acanthium L.
Linaria dalmatica (L.) Mill.
Linaria vulgaris Mill.
Nassella trichotoma (Nees) Hack. ex Arechav.
Lepidium draba L.
Isatis tinctoria L.
Restricted Noxious Weeds. The tolerance for restricted noxious weeds, unless otherwise stated,
shall be fifty (50) seeds per pound in small seeded crops and five (5) seeds per pound in large seeded
crops.
Cinquefoil, sulphur
Dock, curly
Knotweed, Japanese
Lettuce, blue
Licorice, wild
Mallow, Venice
Mustard, wild
Oat, wild
Plantain, buckhorn
Povertyweed
Ragweed, perennial
Potentilla recta L. ‘Warrenii’
Rumex crispus L.
Fallopia japonica (Houtt.) Ronse Decr.
Lactuca tatarica subsp. pulchella (Pursh) Stebbins
Glycyrrhiza lepidota Pursh
Hibiscus trionum L.
Sinapis arvensis L. subsp. arvensis
Avena fatua L.
Plantago lanceolata L.
Iva axillaris Pursh
Ambrosia psilostachya DC.
Regulated Weeds. The tolerance for regulated weeds is specified for each species as shown
below. These species are not considered to be prohibited or restricted noxious weeds.
Cheat Bromus secalinus L. – Tolerance shall be 1,200 seeds per pound.
Downy brome Bromus tectorum L. – Tolerance shall be 1,200 seeds per pound.
Feral rye Secale cereale L. subsp. cereale – Tolerance shall be none (0) in small grains other than
rye.
Japanese brome Bromus japonicus Thunb. – Tolerance shall be 1,200 seeds per pound.
Ripgut brome Bromus diandrus Roth var. rigidus (Roth) Sales – Tolerance shall be 1,200 seeds
per pound.
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I. MINT WILT QUARANTINE
PEST: Mint Wilt (Verticillium dahliae (V. alboatrum))
STATES REGULATED: All states, counties, or regions known to be infested.
MATERIALS REGULATED: All mint roots and plants except "Hybrid" mint seed stock.
All mint equipment except that equipment that has a phytosanitary certificate from the state
of origin.
RESTRICTIONS: All mint roots and plants are restricted except cuttings done by "tip
cutting" or the Meristem procedure.