The following weeds are officially designated and published as noxious for the State of Utah, as per the authority vested in the Commissioner of Agriculture under Section 4-17-3, Utah Noxious Weed Act:

• Bermudagrass** (cynodon dactylon)
• Canada thistle (cirsium arvense)
• Diffuse knapweed (centaurea diffusa)
• Dyers woad (isatis tinctoria L)
• Field bindweed (Wild Morning Glory) (convolvulus arvensis)
• Hoary cress (cardaria drabe)
• Johnsongrass (sorghum halepense)
• Leafy spurge (euphorbia esula)
• Medusahead (taeniatherum caput-medusae)
• Musk thistle (carduus mutans)
• Perennial pepperweed (lepidium latifolium)
• Perennial sorghum (sorghum halepense L & sorghum almum)
• Purple loosestrife (lythrum salicaria L.)
• Quackgrass (agropyron repens)
• Russian knapweed (centaurea repens)
• Scotch thistle (onopordum acanthium)
• Spotted knapweed (centaurea maculosa)
• Squarrose knapweed (centaurea squarrosa)
• Yellow starthistle (centaurea solstitialis)

** Bermudagrass shall not be a noxious weed in Washington County and shall not be subject to provisions of the Utah Noxious Weed Act within the boundaries of the county.