Noxious Weeds

R3-4-245. Noxious Weeds

Definitions. In addition to the definitions provided in A.R.S. § 3-201, A.A.C. R3-4-101 and R3-4-201, the following apply to this Section:
1. “Class A Noxious Weed” is categorized as a species of plant that is not known to exist or of limited distribution in the State and is a high priority pest for quarantine, control, or mitigation, Class A noxious weeds are listed in Table 4.
2. “Class B Noxious Weed” is categorized as a species of plant that is known to occur, but of limited distribution in the State and may be a high priority pest for quarantine, control or mitigation if a significant threat to a crop, commodity, or habitat is known to exist. Class B noxious weeds are listed in Table 5.
3. “Class C Noxious Weed” is categorized as a species of plant that is widespread but may be recommended for active control based on risk assessment. Class C noxious weeds are listed in Table 6.
Restrictions:
1. No Class A, B, or C Noxious Weed, or commodity infested or contaminated with a Class A, B, or C Noxious Weed, shall be admitted into the state unless otherwise authorized by the Associate Director.
2. The Department may quarantine and abate an area infested or contaminated with a Class A or Class B Noxious Weed if it has been determined by the Associate Director that an imminent threat to agriculture or horticulture exists.

Class A Noxious Weeds

Common name	Scientific name
African rue	Peganum harmala
Canada thistle	Cirsium arvense
Dudaim melon	Cucumis melo v. Dudaim Naudin
Dyer's woad	Isatis tinctoria
Floating water hyacinth	Eichhornia crassipes
Giant salvinia	Salvinia molesta
Globe-podded hoary cress	Lepidium (Cardaria) draba
Hydrilla	Hydrilla verticillata
Leafy spurge	Euphorbia esula
Plumeless thistle	Carduus acanthoides
Purple loosestrife	Lythrum salicaria
Purple starthistle	Centaurea calcitrapa
Quackgrass	Elymus repens (Elytrigia repens)
Rush skeletonweed	Chondrilla juncea
Southern sandbur	Cenchrus echinatus
Spotted knapweed	Centaurea stoebe ssp. micranthos
Sweet resinbush	Euryops subcarnosus
Ward’s weed	Carrichtera annua
Wild mustard	Sinapis arvensis

Class B noxious weeds

Common name	Scientific name
African sumac	Searsia lancea
Black mustard	Brassica nigra
Branched broomrape	Orobanche ramosa
Bull thistle	Cirsium vulgare
Camelthorn	Alhagi maurorum (A. pseudalhagi)
Dalmatian toadflax	Linaria dalmatica (L genistifolia v. dalmatica)
Diffuse knapweed	Centaurea diffusa
Field sandbur	Cenchrus spinifex (synonym: C. incertus)
Giant reed	Arundo donax
Halogeton	Halogeton glomeratus
Jointed goatgrass	Aegilops cylindrica
Malta starthistle	Centaurea melitensis
Musk thistle	Carduus nutans
Natal grass	Melinis repens
Onionweed	Asphodelus fistulosus
Ripgut brome	bromus diandrus
Russian knapweed	Acroptilon repens
Russian olive	Elaeagnus angustifolia
Saharan mustard	Brassica tournefortii
Siberian elm	Ulmus pumila
Stinknet (Globe chamomile)	Oncosiphon pilulifer (O. piluliferum)
Scotch thistle	Onopordum acanthium
Yellow bluestem	Bothriochloa ischaemum
Yellow starthistle	Centaurea solstitialis

Class C noxious weeds

Common name	Scientific name
Buffelgrass	Cenchrus ciliaris (Pennisetum ciliare)
Cheatgrass	Bromus tectorum
Field bindweed	Convolvulus arvensis
Fountain grass	Pennisetum setaceum
Garden or common morning glory	Ipomoea purpurea
Grannyvine	Ipomoea tricolor
Ivy-leaf morning glory	Ipomoea hederacea
Johnsongrass	Sorghum halepense
Kochia	Kochia scoparia
Lehman's lovegrass	Eragrostis lehmanniana
Morning glory	Ipomoea triloba
Morning glory	Ipomoea x leucantha
Puncturevine	Tribulus terrestris
Red Brome	Bromus rubens
Salt cedar	Tamarix spp.
Siberian elm	Ulmus pumila
Tree of heaven	Ailanthus altissima

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