Washington Administrative Code
Title 16 - Agriculture, Department of (See also Titles 24, 60, and 142)
SEEDS AND PLANTING STOCK CERTIFICATION
Chapter 16-302 - General rules for seed certification
Part 1 - PERMANENT MIXING/LOADING SITE
Section 16-302-100 - Seed certification-Prohibited noxious weed seed
Universal Citation: WA Admin Code 16-302-100
Current through Register Vol. 24-06, March 15, 2024
The following are considered prohibited noxious weeds for the purpose of seed certification.
| ENGLISH OR COMMON NAME | BOTANICAL OR SCIENTIFIC NAME |
| Austrian fieldcress | Rorippa austriaca |
| Field bindweed | Convolvulus arvensis |
| Hedge bindweed | Calystegia spp. |
| Camelthorn | Alhagi maurorum |
| Canada thistle | Cirsium arvense |
| Dodder | Cuscuta spp. |
| Hairy whitetop | Lepidium appelianum |
| Hoary cress | Lepidium draba |
| Jointed goatgrass and jointed goatgrass hybrids | Aegilops cylindrica |
| Leafy spurge | Euphorbia esula |
| Palmers amaranth | Amaranthus palmeri |
| Perennial pepperweed | Lepidium latifolium |
| Perennial sowthistle | Sonchus arvensis |
| Quackgrass | Elymus repens |
| Knapweed complex | |
| Bighead | Centaurea macrocephala |
| Vochin | Centaurea nigrescens |
| Black | Centaurea nigra |
| Brown | Centaurea jacea |
| Diffuse | Centaurea diffusa |
| Meadow | Centaurea x moncktonii |
| Russian | Rhaponticum repens |
| Spotted | Centaurea stoebe subsp. australis |
| Purple starthistle | Centaurea calcitrapa |
| Yellow starthistle | Centaurea solstitialis |
| Serrated tussock | Nassella trichotoma |
| Silverleaf nightshade | Solanum elaeagnifolium Cav. |
| Sorghum perennial such as, but not limited to, johnson-grass, sorghum almum, and perennial sweet sudangrass | Sorghum spp. |
| Tansy ragwort | Jacobaea vulgaris |
| Yellow-flowering skeleton weed | Chondrilla juncea |
| White cockle | Silene latifolia (only in timothy) |
| Bladder campion | Silene vulgaris (only in timothy) |
| Lepyrodiclis | Lepyrodicilis holsteoides |
| Velvetleaf | Abutilon theophrasti |
Statutory Authority: Chapter 15.49 RCW. 09-16-006, § 16-302-100, filed 7/22/09, effective 8/22/09. Statutory Authority: RCW 15.49.005, 15.49.081, 15.49.310, 15.49.370(3) and chapter 17.24 RCW. 00-24-077, § 16-302-100, filed 12/4/00, effective 1/4/01.
Disclaimer: These regulations may not be the most recent version. Washington may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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