WSR 04-08-082



[ Filed April 6, 2004, 9:22 a.m. ]

Date of Adoption: April 6, 2004.

Purpose: This rule-making order adds WAC 16-470-750, 16-470-755, 16-470-760, 16-470-765, 16-470-770, and 16-470-775 to chapter 16-470 WAC by establishing a quarantine for Phytophthora ramorum, a fungal-like pathogen which causes a plant disease often called sudden oak death. Movement into Washington state from California of plants of host species and soil and potting mix associated with host species is prohibited, unless conditions specified in rule have been met. Advance notification of shipments and a phytosanitary certificate from the official state or federal certifying agency must accompany each shipment of regulated articles. Additional restrictions for cultures and live material of the pathogen are enacted.

Statutory Authority for Adoption: Chapters 17.24 and 15.13 RCW.

Under RCW 34.05.350 the agency for good cause finds that immediate adoption, amendment, or repeal of a rule is necessary for the preservation of the public health, safety, or general welfare, and that observing the time requirements of notice and opportunity to comment upon adoption of a permanent rule would be contrary to the public interest.

Reasons for this Finding: The intrusion into this state of the nonnative, invasive plant pest species Phytophthora ramorum on or in association with horticultural plants is of grave and immediate concern. To date, extensive survey and testing has not identified this pathogen in Washington, except in confined nursery environments. Phytophthora ramorum infestations have recently been identified at a major California nursery, from which significant amounts of stock were and continue to be shipped into Washington state. The primary shipping season for nursery stock is now, and risk of entry of this pathogen is urgent. This rule is being adopted to protect the economic well-being of the agricultural, forest, horticultural, and floricultural industries, and the environmental quality and natural resources of the state.

Number of Sections Adopted in Order to Comply with Federal Statute: New 0, Amended 0, Repealed 0; Federal Rules or Standards: New 0, Amended 0, Repealed 0; or Recently Enacted State Statutes: New 0, Amended 0, Repealed 0.

Number of Sections Adopted at Request of a Nongovernmental Entity: New 0, Amended 0, Repealed 0.

Number of Sections Adopted on the Agency's Own Initiative: New 6, Amended 0, Repealed 0.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.
Effective Date of Rule: Immediately.

April 6, 2004

Valoria H. Loveland



WAC 16-470-750   Establishing quarantine for Phytophthora ramorum.   Phytophthora ramorum is a nonnative, invasive fungal-like pathogen that causes sudden oak death disease in some oak species and severe canker, blight or twig dieback in numerous other plant genera. The pathogen is capable of spreading through multiple pathways, including infected host species in nursery stock. Known infestations have occurred in Washington in a few sites, all of which have been contained. Known infestations have recently been found in nursery stock shipped into Washington and many other states from at least one major producer in California. If allowed to become widely established in Washington, Phytophthora ramorum could have a devastating economic impact on the agriculture and forestry industries of the state and could endanger the environmental quality, native plant populations, and natural resources of the state. The director of agriculture, pursuant to chapters 17.24 and 15.13 RCW, has determined that the regulation and exclusion of host species, associated soil and potting mix, and cultures of Phytophthora ramorum itself, is necessary to protect the agricultural crops, economic health and environmental quality of the state.


WAC 16-470-755   Phytophthora ramorum -- Area under quarantine.   The entire state of California is the area under quarantine.


WAC 16-470-760   Phytophthora ramorum -- Regulated articles.   All of the following are designated regulated articles:

(1) All plants of the following species:

Abies grandis Pieris floribunda x japonica Rubus spectabilis
Acer macrophyllum Pieris formosa Sequoia sempervirens
Aesculus californica Pieris formosa x japonica Syringa vulgaris
Aesculus hippocastanum Pieris formosa var. forrestii Taxus baccata
Arbutus menziesii Pieris formosa var. forrestii x Pieris japonica Toxicodendron diversiloba
Arbutus unedo Pieris x japonica Trientalis latifolia
Arctostaphylos manzanita Pittosporum undulatum Umbellularia californica
Camellia japonica Pseudotsuga menziesii Vaccinium ovatum
Camellia reticulate Quercus agrifolia Vaccinium vitis-idaea
Camellia sasanqua Quercus chrysolepis Viburnum x bodnantense
Camellia x williamsii Quercus falcate Viburnum x burkwoodii
Castanea sativa Quercus ilex Viburnum x carlcephalum x V. utile
Corylus cornuta Quercus kelloggii Viburnum x pragense
Fagus sylvatica Quercus parvula v. shrevei Viburnum davidii
Hamamelis virginiana Quercus rubra Viburnum farreri (= V. fragrans)
Heteromeles arbutifolia Quercus sativa Viburnum lantana
Kalmia latifolia Rhamnus californica Viburnum opulus
Leucothoe fontanesiana Rhamnus purshiana Viburnum plicatum var. tomentosum
Lithocarpus densiflorus Rhododendron spp. Viburnum tinus
Lonicera hispidula Rosa gymnocarpa

(2) Soil and potting mixes that:

(a) Are associated with shipments of regulated articles designated in subsection (1) of this section, including incidental mud and soil on pots, means of conveyance, pallets, and other shipping materials; or

(b) Have been within five feet of a Phytophthora ramorum infected plant or from an infected site.

(3) All cultures and live material of Phytophthora ramorum.


WAC 16-470-765   Phytophthora ramorum -- Notification requirements and restrictions.   (1) All shipments of regulated articles specified in WAC 16-470-760 (1) or (2) must be accompanied by a certificate issued by an authorized state or federal regulatory official from the state of origin certifying that the commodity and associated soil or potting mix is free of Phytophthora ramorum.

(2) All shipments of regulated articles specified in WAC 16-470-760(3) are prohibited unless accompanied by a special permit issued by the department pursuant to WAC 16-470-775.

(3) Persons shipping any regulated article specified in WAC 16-470-760 into this state from the area under quarantine shall notify the department's plant services program in advance of the shipment. Notification shall consist of transmitting a copy of the certificate designated in subsection (1) of this section to: Nursery Inspection Program Supervisor, Plant Protection Division, Washington State Department of Agriculture, 1111 Washington St. SE, P.O. Box 42560, Olympia, WA 98504-2560; fax 360-902-2094; e-mail:


WAC 16-470-770   Phytophthora ramorum -- Disposal of articles regulated under this quarantine.   Any regulated articles that are in violation of this Phytophthora ramorum quarantine are subject to destruction, shipment out-of-state or other disposition in a manner prescribed by the department. Any such action will be at the expense of the owner or owner's agent and without compensation.


WAC 16-470-775   Phytophthora ramorum -- Special permits.   The department may issue special permits for entry of regulated articles otherwise prohibited in WAC 16-470-750 through 16-470-775. Requests for permits shall be addressed to: Nursery Inspection Program Supervisor, Plant Protection Division, Washington State Department of Agriculture, 1111 Washington St. SE, P.O. Box 42560, Olympia, WA 98504-2560; fax 360-902-2094; e-mail:


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