Noxious Weeds

                             

 

Webpage in progress

 

Tools available to assist with noxious weed identification:

  • The Custer County Invader: an invasive weed booklet (copies available in the Weed & Pest office and at the Courthouse on the 2nd floor by the Treasurer’s office)
  • South Dakota’s Noxious Weeds: a poster of the state and locally noxious weeds (limited copies are available in the Weed & Pest office)
  • SDSU Extension pocket guide to the Noxious Weeds of South Dakota
  • Drop off plant samples in the office or send an email with plant photos

County invasive weed booklet cover Noxious Weed PosterSDSU Noxious Weed pamphlet

 

State Declared Noxious Weeds

Leafy spurge (Euphorbia esula) 
Canada thistle (Cirsium arvense) 
Perennial sow thistle (Sonchus arvensis) 
Hoary cress (Cardaria draba)
Absinth wormwood (Artemisia absinthium)
Purple loosestrife (Lythrum salicaria)
Salt cedar (Tamarix aphylla, T. chinensis, T. gallica, T. parviflora and T. ramosissima)

State Declared Pests

Gypsy moth (Lymantria dispar) (aka spongy moths)

Custer County Declared Noxious Weeds

Black henbane (Hyoscyamus niger)
Common mullein (Verbascum thapsus)
Musk thistle (Carduus nutans)
Plumeless thistle (Carduus acanthoides)
Spotted knapweed (Centaurea maculosa)
St. John’s wort (Hypericum perforatum)
White horehound (Marrubium vulgare)
Yellow toadflax (Linaria vulgaris)

Other locally noxious weeds in South Dakota

Bull thistle (Cirsium vulgare)
Chicory (Cichorium intybus)
Common burdock (Arctium minus)
Common tansy (Tanacetum vulgare)
Dalmatian toadflax (Linaria dalmatica)
Diffuse knapweed (Centaurea diffusa)
Field bindweed (Convolvulus arvensis)
Flowering rush (Butomus umbellatus L.)
Giant knotweed (Polygonum sachalinense)
Houndstongue (Cynoglossum officinale)
Oxeye daisy (Leucanthemum vulgare)
Palmer amaranth (Amaranthus palmeri)
Phragmites (Phragmites australis)
Poison hemlock (Conium maculatum)
Puncturevine (Tribulus terrestris)
Scotch thistle (Onopordum acanthium)
Sulfur cinquefoil (Potentilla)
Wild Parsnip (Pastinaca sativa)

Other Pests in South Dakota

Japanese beetle (Popillia japonica)
Mountain pine beetle (Dendroctonum ponderosae)

Other Invasive Plants to Watch For (Contact the office if any are detected)

Brown Knapweed (Centaurea jacea)
Common Teasel (Dipsacus fullonum)
Meadow Sage (Salvia pratensis)
Meadow Hawkweed (Hieracium caespitosum)
Medusa Head (Taeniatherum caput-medusae)
Myrtle Spurge (Euphorbia myrsinites)
Orange Hawkweed (Hieracium aurantiacum)
Russian Knapweed (Centaurea repens)
Sickleweed (Falcaria vulgaris)
Spurge Flax (Thymelaea passerina)
Tall Buttercup (Ranunculus acris)
Tall Hawkweed (Hieracium piloselloides)
Ventenata (Ventenata dubia)
Yellow Bluestem (Bothriochloa ischaemum)
Yellow Flag Iris (Iris pseudacorus)
Yellow Starthistle (Centaurea solstitialis)