Noxious Weed Seeds - means seeds of perennial or annual weeds which, when established, are highly destructive and difficult to control by ordinary good cultural practices. The seeds of all weeds classified as “noxious” are prohibited by ACIA standards from any class of certified seed. Arizona Seed Law Rule Section R3-4-403 categorizes the state’s noxious weed seeds as follows:
Prohibited (cannot be present in any seed sold in the state) -
1. Acroptilon repens (L.) DC. - Russian knapweed;
2. Aegilops cylindrica Host. - Jointed goatgrass;
3. Alhagi maurorum – Camelthorn;
4. Alternanthera philoxeroides (Mart.) Griseb. - Alligator weed;
5. Cardaria pubescens (C.A. Mey) Jarmolenko -Hairy whitetop;
6. Cardaria chalepensis (L.) Hand.-Maz. - Lens podded hoary cress;
7. Cardaria draba (L.) Desv. - Globed-podded hoary cress (Whitetop);
8. Carduus acanthoides L. - Plumeless thistle;
9. Cenchrus echinatus L. - Southern sandbur;
10. Cenchrus incertus M.A. Curtis - Field sandbur;
11. Centaurea calcitrapa L. - Purple starthistle;
12. Centaurea iberica Trev. ex Spreng. - Iberian starthistle;
13. Centaurea squarrosa Willd. - Squarrose knapweed;
14. Centaurea sulphurea L. - Sicilian starthistle;
15. Centaurea solstitialis L. - Yellow starthistle (St. Barnaby's thistle);
16. Centaurea diffusa L. - Diffuse knapweed;
17. Centaurea maculosa L. - Spotted knapweed;
18. Chondrilla juncea L. - Rush skeletonweed;
19. Cirsium arvense L. Scop. - Canada thistle;
20. Convolvulus arvensis L. - Field bindweed;
21. Coronopus squamatus (Forskal) Ascherson - Creeping wartcress (Coronopus);
22. Cucumis melo L. var. Dudaim Naudin - Dudaim melon (Queen Anne's melon);
23. Cuscuta spp. – Dodder;
24. Cyperus rotundus – Purple nutgrass or Nutsedge;
25. Cyperus esculentus – Yellow nutgrass or Nutsedge;
26. Drymaria arenarioides H.B.K. - Alfombrilla (Lightningweed);
27. Eichhornia azurea (SW) Kunth. - Anchored waterhyacinth;
28. Elymus repens – Quackgrass;
29. Euphorbia esula L. - Leafy spurge;
30. Halogeton glomeratus (M. Bieb.) C.A. Mey – Halogeton;
31. Helianthus ciliaris DC. - Texas blueweed;
32. Hydrilla verticillata Royale - Hydrilla (Florida-elodea);
33. Ipomoea spp. - Morning glory. All species except Ipomoea carnea, Mexican bush morning glory; Ipomoea triloba, three-lobed morning glory (which is considered a restricted pest); Ipomoea aborescens, morning glory tree; Ipomea batatas – sweetpotato; Ipomoea quamoclit, Cypress Vine; Ipomea noctiflora, Moonflower– Morning Glories, Cardinal Climber, Hearts and Honey Vine
34. Isatis tinctoria L. - Dyers woad;
35. Linaria genistifolia var. dalmatica - Dalmation toadflax;
36. Lythrum salicaria L. - Purple loosestrife;
37. Medicago polymorpha L. – Burclover;
38. Nassella trichotoma (Nees.) Hack. - Serrated tussock;
39. Onopordum acanthium L. - Scotch thistle;
40. Orobanche ramosa L. - Branched broomrape;
41. Panicum repens L. - Torpedo grass;
42. Peganum harmala L. - African rue (Syrian rue);
43. Portulaca oleracea L. - Common purslane;
44. Rorippa austriaca (Crantz.) Bess. - Austrian fieldcress;
45. Salvinia molesta - Giant salvinia;
46. Senecio jacobaea L. - Tansy ragwort;
47. Solanum carolinense - Carolina horsenettle;
48. Solanum elaegnifolium - Silverleaf nightshade;
49. Sonchus arvensis L. - Perennial sowthistle;
50. Solanum viarum Dunal - Tropical soda apple;
51. Sorghum species, perennial (Sorghum halepense - Johnson grass, Sorghum almum, and perennial sweet sudangrass);
52. Stipa brachychaeta Godr. - Puna grass;
53. Striga spp. – Witchweed;
54. Trapa natans L. - Water-chestnut;
55. Tribulus terrestris L. – Puncturevine
Restricted (presence in seed is restricted to the number cited in each pound of seed) -
A person shall not allow more than the number shown of the following restricted noxious weed seeds in a working sample of seed regulated by this Article; or, any more than 50 of any combination of the following restricted noxious weed seeds per working sample. [NOTE: NONE of these species are allowed to be present in any class of Certified seed.]
1. Avena fatua – Wild oat: 5;
2. Brassica campestris – Bird rape: 30;
3. Brassica juncea – Indian mustard: 30;
4. Brassica niger – Black mustard: 30;
5. Brassica rapa – field mustard: 30;
6. Cenchrus pauciflorus – Sandbur: 10;
7. Eichhornia crassipes (Mart.) Solms – Floating waterhyacinth: 10;
8. Euryops sunbcarnosus subsp. vulgaris – Sweet resinbush: 10;
9. Ipomoea triloba L. – Three-lobed morning glory: 10;
10. Rumex crispus – Curly dock: 30;
11. Salsola kali var. tenuifolia – Russian thistle: 30;
12. Sinapis arvensis – Charlock or Wild mustard: 30; and
13. Sida hederacea – Alkali mallow: 30.
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