Nevada Administrative Code (effective 10-31-05)




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Nevada Administrative Code

(effective 10-31-05)


    1. 1. The following weeds are designated noxious weeds:




  1. Category A Weeds:

(1) African rue. (Peganum harmala)

(2) Austrian fieldcress. (Rorippa austriaca)

(3) Austrian peaweed (Sphaerophysa salsula)

(4) Black henbane. (Hyoscyamus niger)

(5) Camelthorn. (Alhagi pseudalhagi)

(6) Common Crupina. (Crupina vulgaris)

(7) Dalmatian toadflax. (Linaria dalmatica)

(8) Dyer’s woad. (Isatis tinctoria)

(9) Eurasian water-milfoil. (Myriophyllum spicatum)

(10) Giant Salvinia. (Salvinia molesta)

(11) Goats rue. (Galega officinalis)

(12) Green fountain grass. (Pennisetum setaceum)

(13) Houndstongue. (Cynoglossum officinale)

(14) Hydrilla. (Hydrilla verticillata)

(15) Iberian starthistle. (Centaurea iberica)

(16) Klamath weed. (Hypericum perforatum)

(17) Malta starthistle. (Centaurea melitensis)

(18) Mayweed chamomile. (Anthemis cotula)

(19) Mediterranean sage. (Salvia aethiopis)

(20) Purple loosestrife. (Lythrum salicaria, Lythrum virgatum and

their cultivars)

(21) Purple starthistle. (Centaurea calcitrapa)

(22) Rush skeletonweed. (Chondrilla juncea)

(23) Sow thistle. (Sonchus arvensis)

(24) Spotted knapweed. (Centaurea maculosa)

(25) Squarrose knapweed. (Centaurea virgata)

(26) Sulfur cinquefoil. (Potentilla recta)

(27) Syrian bean caper (Zygophyllum fabago)

(28) Yellow starthistle. (Centaurea solstitialis)

(29) Yellow toadflax. (Linaria vulgaris)


  1. Category B Weeds:

(1) Carolina horse nettle. (Solanum carolinense)

(2) Diffuse knapweed. (Centaurea diffusa)

(3) Leafy spurge. (Euphorbia esula)

(4) Medusahead. (Taeniatherum caput-medusae)

(5) Must thistle. (Carduus nutans)

(6) Russian knapweed. (Acroptilon repens)

(7) Scotch thistle. (Onopordum acanthium)

(8) White horse nettle. (Solanum elaeagnifolium)


  1. Category C Weeds:

(1) Canada thistle. (Cirsium arvense)

(2) Hoary cress. (Cardaria draba)

(3) Johnson grass. (Sorghum halepense)

(4) Perennial pepperweed. (Lepidium latifolium)

(5) Poison Hemlock. (Conium maculatum)

(6) Puncture vine. (Tribulus terrestris)

(7) Salt cedar (tamarisk) (Tamarix spp.)



(8) Water Hemlock (Cicuta maculata)


  1. Category A weeds are weeds that are generally not found or that are limited in distribution throughout the State. Such weeds are subject to:

      1. Active exclusion from the State and active eradication wherever found.

      2. Active eradication from the premises of a dealer of nursery stock.




  1. Category B weeds are weeds that are generally established in scattered populations in some counties of the state. Such weeds are subject to:




      1. Active exclusion where possible.

      2. Active eradication from the premises of a dealer of nursery stock.




  1. Category C weeds are weeds that are generally established and generally widespread in many counties of the state. Such weeds are subject to active eradication from the premises of a dealer of nursery stock.




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