12:36:03:01.  Prohibited noxious weed seeds. Seed may not contain prohibited noxious weed seeds in any amount. Prohibited noxious weed seeds are as follows:

          (1)  Field bindweed (Convolvulus arvensis);

          (2)  Leafy spurge (Euphorbia esula);

          (3)  Hoary cress (Lepidium draba);

          (4)  Russian knapweed (Rhaponticum repens);

          (5)  Perennial sowthistle (Sonchus arvensis);

          (6)  Canada thistle (Cirsium arvense);

          (7)  Palmer amaranth (Amaranthus palmeri); and

          (8)  Horse nettle (Solanum carolinense).

          Source: 15 SDR 54, effective October 10, 1988; 46 SDR 26, effective September 2, 2019.

          General Authority: SDCL 38-12A-20.

          Law Implemented: SDCL 38-12A-1.

          12:36:03:02.  Restricted noxious weed seeds. Restricted noxious weed seeds shall not exceed a cumulative total of 20 per pound. Restricted noxious weed seeds are as follows:

            (1)  Wild oats (Avena fatua);

            (2)  Dodder (Cuscuta spp.);

            (3)  Wild mustard (Sinapis arvensis L. subsp. arvensis [syn. Brassica kaber], B. nigra, B. juncea);

            (4)  Hedge bindweed (Calystegia sepium);

            (5)  Wild carrot (Daucus carota L. subsp. carota);

            (6)  Field pennycress (Thlaspi arvense);

            (7)  Annual bluegrass (Poa annua);

            (8)  Spotted knapweed (Centaurea stoebe L. subsp. australis);

            (9)  Giant foxtail (Setaria faberi);

          (10)  Musk thistle (Carduus nutans);

          (11)  Plumeless thistle (Carduus acanthoides); and

          (12)  Quackgrass (Elymus repens).

          Source: 15 SDR 54, effective October 10, 1988; 46 SDR 26, effective September 2, 2019.

          General Authority: SDCL 38-12A-20.

          Law Implemented: SDCL 38-12A-1.

          12:36:03:03.  Maximum content of weed seed. Seed other than the grasses listed in this section may not contain more than one percent by weight of weed seed. Seed of the following grasses or mixtures of these grasses may not contain more than three percent by weight of weed seeds:

          (1)  Bluestems (Andropogon spp., Bothriochloa spp., and Schizachyrium scaparium);

          (2)  Indiangrass (Sorghastrum nutans);

          (3)  Gramas (Bouteloua spp.); and

          (4)  Prairie sandreed (Calamovilfa longifolia).

          Source: 15 SDR 54, effective October 10, 1988; 46 SDR 26, effective September 2, 2019.

          General Authority: SDCL 38-12A-20.

          Law Implemented: SDCL 38-12A-16.