1. (1) The department designates and publishes noxious weeds into five classes.

2. (2) Noxious and invasive weeds listed in Table 1 are Class 1A: EDRR Watch List. They are declared to be:

   1. (a) not native to Utah;
   2. (b) not known to exist in the state;
   3. (c) a serious threat to the state; and

   4. (d) a very high priority if identified in the state.

      TABLE 1Class 1A (EDRR Watch List)Weed NameBinomial NameCommon crupinaCrupina vulgarisMediterranean sageSalvia aethiopisPlumeless thistleCarduus acanthoidesSmall buglossAnchusa arvensisSpring milletMilium vernaleSyrian bean caperZygophyllum fabago

3. (3) Noxious and invasive weeds listed in Table 2 are Class 1B: EDRR. They are declared to be:

   1. (a) not native to Utah;
   2. (b) known to exist in the state in very limited populations;

   3. (c) a serious threat to the state; and a very high priority.

      TABLE 2Class 1B (EDRR)Weed NameBinomial NameAfrican mustardBrassica tournefortiiAfrican ruePeganum harmalaBlueweed (Vipers bugloss)Echium vulgareCamelthornAlhagi maurorumCommon St. JohnswortHypericum perforatum

      Cutleaf vipergrassScorzonera laciniataElongated mustardBrassicas elongateEurasian watermilfoilMyriophyllum spicatum L.Garlic mustardAlliaria petiolateGiant reedArundo donaxGoat's rueGalega officinalisJapanese knotweedPolygonum cuspidatumMalta starthistleCentaurea melitensisOxeye daisyLeucanthemum vulgareParrot featherMyriophyllum aquaticumPurple starthistleCentaurea calcitrapaVentenata (North African grass)Ventenata dubia

4. (4) Noxious and invasive weeds listed in Table 3 are Class 2: Control. They are declared to be:

   1. (a) not native to Utah;
   2. (b) a threat to the state; and

   3. (c) a high priority for control.

      1. (i) Weeds listed in the control list are known to exist in varying populations throughout the state.

      2. (ii) The concentration of these weeds is at a level where control or eradication may be possible.

         TABLE 3Class 2 (Control)Weed NameBinomial NameBlack henbaneHyoscyamus nigerDalmatian toadflaxLinaria dalmaticaDiffuse knapweedCentaurea diffusaDyer's woadIsatis tinctoriaLeafy spurgeEuphorbia esulaMedusaheadTaeniatherum caput-medusaePurple loosestrifeLythrum salicariaRush skeleton weedChondrilla junceaSpotted knapweedCentaurea stoebe

         Squarrose knapweedCentaurea virgataYellow starthistleCentaurea solstitialisYellow toadflaxLinaria vulgaris

5. (5) Noxious and invasive weeds listed in Table 4 are Class 3: Containment. They are declared to be:

   1. (a) not native to Utah; and

   2. (b) widely spread.

      1. (i) Weeds listed in the containment noxious weeds list are known to exist in various populations throughout the state.
      2. (ii) Weed control efforts may be directed at reducing or eliminating new or expanding weed populations.
      3. (iii) A County Weed Control Board may determine known and established weed populations and manage them according to any approved weed control methodology.
      4. (iv) Class 3 weeds threaten the agricultural industry and agricultural products.
      5. (v) The department does not consider Bermudagrass as a noxious and invasive weed in Washington County and it is not subject to Title 4, Chapter 17 Utah Noxious Weed Act within Washington County.

      6. (vi) Triploid hybrid Bermudagrass purchased from a producer certified with the Utah Crop Improvement Association and the Nursery Inspection program is allowed for commercial and private uses throughout Utah.

         TABLE 4Class 3 (Containment)Weed NameBinomial NameBermudagrass*Cynodon dactylonCanada thistleCirsium arvenseField bindweed (Wild Morning-glory)Convolvulus spp.Hoary cress (globe-podded)Lepidium draba (Cardaria draba)Hoary cress (heart-podded)Lepidium chalepense (Cardaria chalepensis)Hoary cress (lens-podded)Lepidium appelianum (Cardaria pubescens)HoundstongueCynoglossum officianaleJointed goatgrassAegilops cylindricaMusk thistleCarduus nutansPerennial pepperweed (Tall whitetop)Lepidium latifoliumPerennial Sorghum spp. Including: Johnson grass Columbus grassSorghum halepenseSorghum almumPhragmites (Common reed)Phragmites australis ssp.Poison hemlockConium maculatumPuncturevine (Goathead)Tribulus terrestrisQuackgrassElymus repens

         Russian knapweedAcroptilon repensScotch thistle (Cotton thistle)Onopordum acanthiumTamarisk (Saltcedar)Tamarix ramosissima* Bermudagrass (Cynodon dactylon) may not be considered a noxious weed in Washington County.Triploid Hybrid Bermudagrass is not considered a noxious weed in Utah.

6. (6) Noxious and invasive weeds listed in Table 5 are Class 4: Prohibited for sale or propagation. They are declared to be:

   1. (a) not native to Utah; and

   2. (b) a threat to the state through retail sales or propagation in the nursery and greenhouse industry.

      1. (i) The department designates annual, biennial, or perennial plants that have the potential or are known to be detrimental to human or animal health, the environment, public roads, crops, or other property as prohibited noxious weeds.

      2. (ii) Section R68-8-2 Prohibited Noxious Weed Seeds and Restricted Weed Seeds are listed.

         TABLE 5Class 4 (Prohibited)Weed NameBinomial NameCogongrass (Japanese blood grass)Imperata cylindricaDames RocketHesperis matronalisMyrtle spurgeEuphorbia myrsinitesRussian oliveElaeagnus angustifoliaScotch broomCytisus scoparius

7. (7) Tables 1, 2, 3, 4, and 5 list the weeds officially designated and published as noxious weeds for Utah. Each county may have different priorities regarding specific state designated noxious weeds and may reprioritize these weeds for the county weed list.

KEY: noxious weeds, weed classifications, weed control

Date of Last Change: June 28, 2024

Notice of Continuation: April 25, 2023

Authorizing, and Implemented or Interpreted Law: 4-2-103(1)(i); 4-17-115(3); 4-17-103; 63G-30-102