Idaho Admin. Code r. 02.06.09.220 - NOXIOUS WEEDS - DESIGNATIONS

The weeds listed on the Statewide Prohibited Genera, EDRR, Containment, and Control lists are hereby officially designated and published as noxious.

01. Statewide Prohibited Genera Noxious Weed List.

a. All plants and plant parts in the genera of: Cytisus, Genista, Spartium, and Chamaecytisus additionally including "all" subtaxa of these plant genera are prohibited in Idaho.

b. Weeds listed in the Prohibited Genera list may exist in varying populations throughout the state. The concentration of these weeds is at a level where control and/or eradication may be possible. A written plan for weeds on the Statewide Prohibited Genera Noxious Weed List shall be developed by the control authority that specifies active control methods to reduce known populations in not more than five (5) years. The plan shall be available to the Department upon request.

02. Statewide EDRR Noxious Weed List. If any of the listed plants (Subsection 220.02) are found to occur in Idaho, they shall be reported to the Department within ten (10) days following positive identification by the University of Idaho or other qualified authority as approved by the Director. These weeds shall be eradicated during the same growing season as identified.

Common Name	Scientific Name
1. Brazilian Elodea	Egeria densa
2. Cogongrass	Imperata cylindrica
3. Common/European Frogbit	Hydrocharis morsus-ranae
4. Fanwort	Cabomba caroliniana
5. Feathered Mosquito Fern	Azolla pinnata
6. Giant Hogweed	Heracleum mantegazzianum
7. Giant Salvinia	Salvinia molesta
8. Goatsrue	Galega officinalis
9. Hydrilla	Hydrilla verticillata
10. Iberian Starthistle	Centaurea iberica
11. Policeman's Helmet	Impatiens glandulifera
12. Purple Starthistle	Centaurea calcitrapa
13. Squarrose Knapweed	Centaurea triumfetti
14. Starry Stonewort	Nitellopsis obtusa
15. Syrian Beancaper	Zygophyllum fabago
16. Tall Hawkweed	Hieracium piloselloides
17. Turkish Thistle	Carduus cinereus
18. Variable-Leaf-Milfoil	Myriophyllum heterophyllum
19. Water Chestnut	Trapa natans
20. Water Hyacinth	Eichhornia crassipes
21. Yellow Devil Hawkweed	Hieracium glomeratum
22. Yellow Floating Heart	Nymphoides pelata

03. Statewide Control Noxious Weed List. Weeds listed in the control list are known to exist in varying populations throughout the state. The concentration of these weeds is at a level where control or eradication, or both, may be possible. A written plan for weeds on the Statewide Control Noxious Weed List shall be developed by the control authority that specifies active control methods to reduce known populations in not more than five (5) years. The plan shall be available to the Department upon request.

Common Name	Scientific Name
1. Black Henbane	Hyoscyamus niger
2. Bohemian Knotweed	Polygonum X bohemicum
3. Common Crupina	Crupina vulgaris
4. Common Reed (Phragmites)	Phragmites australis
5. Dyer's Woad	Isatis tinctoria
6. Eurasian Watermilfoil	Myriophyllum spicatum (and hybrids)
7. Flowering Rush	Butomus umbellatus
8. Giant Knotweed	Polygonum sachalinense
9. Japanese Knotweed	Polygonum cuspidatum
10. Johnsongrass	Sorghum halepense
11. Matgrass	Nardus stricta
12. Meadow Knapweed	Centaurea debeauxii
13. Mediterranean Sage	Salvia aethiopis
14. Musk Thistle	Carduus nutans
15. Orange Hawkweed	Hieracium aurantiacum
16. Parrotfeather Milfoil	Myriophyllum aquaticum
17. Perennial Sowthistle	Sonchus arvensis
18. Russian Knapweed	Acroptilon repens
19. Scotch Broom	Cytisus scoparius
20. Small Bugloss	Anchusa arvensis
21. Vipers Bugloss	Echium vulgare
22. Yellow Hawkweed	Hieracium caespitosum

04. Statewide Containment Noxious Weed List. Weeds listed in the containment noxious weeds list are known to exist in various populations throughout the state. Weed control efforts may be directed at reducing or eliminating new or expanding weed populations while known and established weed populations, as determined by the weed control authority, may be managed by any approved weed control methodology, as determined by the weed control authority.

Common Name	Scientific Name
1. Canada Thistle	Cirsium arvense
2. Curlyleaf Pondweed	Potamogeton crispus
3. Dalmatian Toadflax	Linaria dalmatica ssp. dalmatica
4. Diffuse Knapweed	Centaurea diffusa
5. Field Bindweed	Convolvulus arvensis
6. Hoary Alyssum	Berteroa incana
7. Houndstongue	Cynoglossum officinale
8. Jointed Goatgrass	Aegilops cylindrica
9. Leafy Spurge	Euphorbia esula
10. Milium	Milium vernale
11. Oxeye Daisy	Leucanthemum vulgare
12. Perennial Pepperweed	Lepidium latifolium
13. Plumeless Thistle	Carduus acanthoides
14. Poison Hemlock	Conium maculatum
15. Puncturevine	Tribulus terrestris
16. Purple Loosestrife	Lythrum salicaria
17. Rush Skeletonweed	Chondrilla juncea
18. Saltcedar	Tamarix spp.
19. Scotch Thistle	Onopordum acanthium
20. Spotted Knapweed	Centaurea stoebe
21. Tansy Ragwort	Senecio jacobaea
22. White Bryony	Bryonia alba
23. Whitetop (Hoary Cress)	Cardaria draba
24. Yellow Flag Iris	Iris pseudocorus
25. Yellow Starthistle	Centaurea solstitialis
26. Yellow Toadflax	Linaria vulgaris

05. Designation of Articles Capable of Disseminating Noxious Weeds. The following articles are designated by the Director as capable of disseminating noxious weeds:

a. Construction equipment, road building and maintenance equipment, and implements of husbandry.

b. Motorized vehicles such as, all-terrain vehicles, motorcycles, and other off-road vehicles and non-motorized vehicles such as bicycles and trailers.

c. Grain and seed.

d. Hay, straw and other material of similar nature.

e. Nursery stock including plant material propagated for the support of aquarium, pet, or horticultural activities.

f. Feed and seed screenings.

g. Fence posts, fencing and railroad ties.

h. Sod.

i. Manure, fertilizers and material of similar nature.

j. Soil, sand, mulch, and gravel.

k. Boats, personal watercraft, watercraft trailers, and items of a similar nature.

Notes

Idaho Admin. Code r. 02.06.09.220

Effective July 1, 2024