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:
- “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.
- “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.
- “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:
- 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.
- 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 |
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 |
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 |
Russian knapweed |
Acroptilon repens |
Russian olive |
Elaeagnus angustifolia |
Saharan mustard |
Brassica tournefortii |
Stinknet (Globe chamomile) |
Oncosiphon 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) |
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 |
Morning glory |
Ipomoea triloba |
Morning glory |
Ipomoea x leucantha |
Puncturevine |
Tribulus terrestris |
Salt cedar |
Tamarix ramosissima |
Tree of heaven |
Ailanthus altissima |