WSR 26-08-059
PERMANENT RULES
NOXIOUS WEED
CONTROL BOARD
[Filed March 27, 2026, 10:51 a.m., effective April 27, 2026]
Effective Date of Rule: Thirty-one days after filing.
Purpose: The Washington state noxious weed list provides the basis for noxious weed control efforts for county and district weed control boards, as well as other entities. This rule-making order amends the noxious weed list in WAC 16-750-005 Class A noxious weed additions.
•Sunflower broomrape, Orobanche cumana.
Citation of Rules Affected by this Order: Amending WAC 16-750-005.
Statutory Authority for Adoption: Chapter 17.10 RCW.
Other Authority: Chapter 34.05 RCW.
Adopted under notice filed as WSR 26-04-021 on January 23, 2026.
Number of Sections Adopted in Order to Comply with Federal Statute: New 0, Amended 0, Repealed 0; Federal Rules or Standards: New 0, Amended 0, Repealed 0; or Recently Enacted State Statutes: New 0, Amended 0, Repealed 0.
Number of Sections Adopted at the Request of a Nongovernmental Entity: New 0, Amended 0, Repealed 0.
Number of Sections Adopted on the Agency's own Initiative: New 0, Amended 1, Repealed 0.
Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 0, Amended 0, Repealed 0.
Number of Sections Adopted using Negotiated Rule Making: New 0, Amended 0, Repealed 0; Pilot Rule Making: New 0, Amended 0, Repealed 0; or Other Alternative Rule Making: New 0, Amended 0, Repealed 0.
Date Adopted: March 27, 2026.
Allen D. Evenson
Chairman
RDS-6955.1
AMENDATORY SECTION(Amending WSR 25-24-076, filed 12/1/25, effective 1/1/26)
WAC 16-750-005State noxious weed list—Class A noxious weeds.
Common Name
Scientific Name
broom, French
Genista monspessulana
broom, Spanish
Spartium junceum
common crupina
Crupina vulgaris
cordgrass, common
Spartina anglica
cordgrass, dense-flowered
Spartina densiflora
cordgrass, salt meadow
Spartina patens
cordgrass, smooth
Spartina alterniflora
delta arrowhead
Sagittaria platyphylla
dyer's woad
Isatis tinctoria
eggleaf spurge
Euphorbia oblongata
false brome
Brachypodium sylvaticum
floating primrose-willow
Ludwigia peploides
flowering rush
Butomus umbellatus
garlic mustard
Alliaria petiolata
giant hogweed
Heracleum mantegazzianum
goatsrue
Galega officinalis
hydrilla
Hydrilla verticillata
Johnsongrass
Sorghum halepense
knapweed, bighead
Centaurea macrocephala
knapweed, Vochin
Centaurea nigrescens
kudzu
Pueraria montana var. lobata
meadow clary
Salvia pratensis
oriental clematis
Clematis orientalis
Palmer amaranth
Amaranthus palmeri
purple starthistle
Centaurea calcitrapa
reed sweetgrass
Glyceria maxima
ricefield bulrush
Schoenoplectus mucronatus
round leaf bittersweet
Celastrus orbiculatus
sage, clary
Salvia sclarea
sage, Mediterranean
Salvia aethiopis
silverleaf nightshade
Solanum elaeagnifolium
small-flowered jewelweed
Impatiens parviflora
South American spongeplant
Limnobium laevigatum
Sunflower broomrape
Orobanche cumana
Syrian bean-caper
Zygophyllum fabago
Texas blueweed
Helianthus ciliaris
thistle, Italian
Carduus pycnocephalus
thistle, marsh
Cirsium palustre
thistle, milk
Silybum marianum
thistle, slenderflower
Carduus tenuiflorus
thistle, Turkish
Carduus cinereus
variable-leaf milfoil and hybrids
Myriophyllum heterophyllum
Myriophyllum
heterophyllum x
Myriophyllum hippuroides
waterhemp
Amaranthus tuberculatus
wild four o'clock
Mirabilis nyctaginea