(a) Except for those kinds of noxious-weed seeds shown in paragraph (b) of this section, the names of the kinds of noxious-weed seeds and the rate of occurrence of each shall be expressed in the label in accordance with, and the rate of occurrence shall not exceed the rate permitted by, the law and regulations of the state into which the seed is offered for transportation or is transported. If in the course of such transportation, or thereafter, the seed is diverted to another State of destination, the person or persons responsible for such diversion shall cause the seed to be relabeled with respect to the noxious-weed seed content, if necessary to conform to the laws and regulations of the State into which the seed is diverted.
(b) Seeds or bulblets of the following plants shall be considered noxious-weed seeds in agricultural and vegetable seeds transported or delivered for transportation in interstate commerce (including Puerto Rico, Guam, and the District of Columbia). Agricultural or vegetable seed containing seeds or bulblets of these kinds shall not be transported or delivered for transportation in interstate commerce. Noxious-weed seeds include the following species on which no tolerance will be applied:
Aeginetia spp.
Ageratina adenophora (Spreng.) King and H.E. Robins.
Alectra spp.
Alternanthera sessilis (L.) DC.
Asphodelus fistulosus L.
Avena sterilis L. (including Avena ludoviciana Dur.)
Azolla pinnata R. Br.
Carthamus oxyacantha M. Bieb
Chrysopogon aciculatus (Retz.) Trin.
Commelina benghalensis L.
Crupina vulgaris Cass.
Digitaria abyssinica Stapf. (=D. scalarum (Schweinf.) Chiov.)
Digitaria scalarum (Schweinfurth) Chiovenda
Drymaria arenarioides Roem. and Schult.
Eichornia azurea (Sw.) Kunth
Emex australis Steinh.
Emex spinosa (L.) Campd.
Galega officinalis L.
Heracleum mantegazzianum Sommier & Levier
Homeria spp.
Hydrilla verticillata (L. f.) Royle
Hygrophila polysperma T. Anders.
Imperata brasiliensis Trin.
Imperata cylindrica (L.) Raeusch.
Ipomoea aquatica Forsk.
Ischaemum rugosum Salisb.
Lagarosiphon major (Ridley) Moss
Leptochloa chinensis (L.) Nees
Limnophila sessiliflora (Vahl) Blume
Lycium ferocissimum Miers
Melaleuca quinquenervia (Cav.) Blake
Melastoma malabathricum L.
Mikania cordata (Burm. f.) B.L. Robins.
Mikania micrantha H.B.K.
Mimosa invisa Mart.
Mimosa pigra L. var. pigra
Monochoria hastata (L.) Sloms-Laub.
Monochoria vaginalis (Burm. f.) K.B. Presl
Nassella trichotoma (Nees) Arechavaleta
Opuntia aurantiaca Lindl.
Oryza longistaminata A. Cheval. and Roehr.
Oryza punctata Steud.
Oryza rufipogon Griff.
Ottelia alismoides (L.) Pers.
Paspalum scrobiculatum L.
Pennisetum clandestinum Chiov.
Pennisetum macrourum Trin.
Pennisetum pedicellatum Trin.
Pennisetum polystachion (L.) Schult.
Prosopis alapataco R.A. Philippi
Prosopis argentina Burkart
Prosopis articulata S. Watson
Prosopis burkartii Munoz
Prosopis caldenia Burkart
Prosopis calingastana Burkart
Prosopis campestris Griseb.
Prosopis castellanosii Burkart
Prosopis denudans Benth.
Prosopis elata (Burkart) Burkart
Prosopis farcta (Russell) Macbride
Prosopis ferox Griseb.
Prosopis fiebrigii Harms
Prosopis hassleri Harms
Prosopis humilis Hook. and Arn.
Prosopis kuntzei Harms
Prosopis pallida (Willd.) H.B.K.
Prosopis palmeri S. Watson
Prosopis reptans Benth. var. reptans
Prosopis rojasiana Burkart
Prosopis ruizlealii Burkart
Prosopis ruscifolia Griseb.
Prosopis sericantha Hook. and Arn.
Prosopis strombulifera (Lam.) Benth.
Prosopis torquata (Lagasca) DC.
Rottboellia cochinchinensis (Lour.) Clayton
Rubus fruticosus L. (complex)
Rubus moluccanus L.
Saccharum spontaneum L.
Sagittaria sagittifolia L.
Salsola vermiculata L.
Salvinia auriculata Aubl.
Salvinia biloba Raddi
Salvinia herzogii de la Sota
Salvinia molesta D.S. Mitchell
Senecio inaequidens DC.
Setaria pallide-fusca (Schumach.) Stapf and Hubb.
Solanum tampicense Dunal
Solanum torvum Sw.
Solanum viarum Dunal
Sparaganium erectum L.
Spermacoce alata (Aublet) de Candolle
Striga spp.
Tridax procumbens L.
Urochloa panicoides Beauv.
[65 FR 1706, Jan. 11, 2000, as amended at 76 FR 31794, June 2, 2011]
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