State and County
Designated Noxious Weeds

WYOMING WEED & PEST CONTROL ACT DESIGNATED LIST

Designated Noxious Weeds .S. 11-5-102 (a)(xi) and
Prohibited Noxious Weeds W.S. 11-12-104(1) Field bindweed    
(Convolvulus arvensis L.)
(2) Canada thistle    
(Cirsium arvense L.)
(3) Leafy spurge   
(Euphorbia esula L.)
(4) Perennial sowthistle   
(Sonchus arvensis L.)
(5) Quackgrass    
(Agropyron repens (L.) Beauv.)
(6) Hoary cress (whitetop)   
(Cardaria draba & Cardaria pubescens (L.) Desv.)
(7) Perennial pepperweed    (giant whitetop)
(Lepidium latifolium L.)
(8) Ox-eye daisy   
(Chrysanthemum leucanthemum L.)
(9) Skeletonleaf bursage   
(Franseria discolor Nutt.)
(10) Russian knapweed   
(Centaurea repens L.)
(11) Yellow toadflax   
(Linaria vulgaris L.)
(12) Dalmatian toadflax   
(Linaria dalmatica (L.) Mill.)
(13) Scotch thistle   
(Onopordum acanthium L.)
(14) Musk thistle    
(Carduus nutans L.)
(15) Common burdock   
(Arctium minus (Hill) Bernh.)
(16) Plumeless thistle   
(Carduus acanthoides L.)
(17) Dyers woad   
(Isatis tinctoria L.)
(18) Houndstongue   
(Cynoglossum officinale L.)
(19) Spotted knapweed   
(Centaurea maculosa Lam.)
(20) Diffuse knapweed   
(Centaurea diffusa Lam.)
(21) Purple loosestrife   
(Lythrum salicaria L.)
(22) Saltcedar   
(Tamarix spp.)
(23) Common St. Johnswort   
(Hypericum perforatum)
(24) Common Tansy    (Tanacetum vulgare)
(25) Russian olive    
(Elaeagnus angustifolia L.)
(26) Black henbane    ( Hyoscymus niger)


Designated Pests W.S. 11-5-102 (a)(xii)

(1) Grasshoppers
(2) Mormon crickets
(3) Prairie dogs
(4) Ground squirrels
(5) Mountain pine beetle
(6) Beet Leafhopper

Sheridan County Declared Weed and Pest List

(1)    Buffalobur
(2)    Common cocklebur
(3)    Common Muellin
(4)    Curly dock 

(5)    Puncturevine
(6)    Showy milkweed
(7)    Wild licorice 

(8)    Poison hemlock
(9)    Western water hemlock
(10)  Lamb's quarters


PESTS

(1)   Mosquitos
(2)   Plains pocket gopher
(3)   Alfalfa weevil

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