The Legislature website will be unavailable intermittently this Saturday, June 6th, from 7:00 AM to 7:00 PM during scheduled server maintenance. We apologize for the inconvenience.
The following requirements specifically apply to Washington certified nursery stock, also known as G4 level material:
(1) The applicant must maintain, and when requested, provide to the department at no cost, the following records of all G4-level materials in this program for at least 10 years.
(a) Records indicating the Latin name, variety or cultivar, rootstock, origin, date of introduction of the G2 materials to the facility, date of propagation in the registered G2 or G3 block, and field location including nursery row and planting.
(b) Records of sale and copies of all phytosanitary certificates issued.
(c) Maps of the facility or nursery indicating locations of Washington certified nursery stock.
(2) All nursery stock grown for G4 certification shall be on rootstocks from registered G2 or G3 trees, except for stone fruit trees grown on peach seedlings from qualified seed sources. Prunus root-stocks for G4 certification shall be acceptable only if the seed transmissible virus content does not exceed five percent and as approved by the department. Clonal rootstocks used in the production of Washington certified nursery stock shall originate from registered stool beds or department-approved certification programs from other states.
(3) Nursery stock grown for G4 certification shall be planted sufficiently apart to maintain its identity and shall be kept clean-cultivated. Such nursery stock shall be designated as to rootstock, top-stock, and interstock sources. Rebudding or regrafting of nursery row stock shall not be allowed unless such stock is reworked with budwood from the same registered scion block.
(4) Seed may be designated as Washington certified seed only if both of the following conditions are complied with:
(a) The seed was produced on registered seed trees; and
(b) The seed lot has been tested for transmissible virus content, and not more than five percent of the seed tested positive for transmissible viruses.
(5) Official certification tags approved by the department may be attached to bundles of G4-level trees at time of distribution and documentation of certification can also be supplied with the invoice.
(6) When it is offered for sale, Washington certified nursery stock must be identified as to variety, interstock and rootstock.
[Statutory Authority: RCW 15.14.015. WSR 26-10-008, s 16-350-035, filed 4/27/26, effective 5/28/26. Statutory Authority: Chapters 15.14 and 34.05 RCW. WSR 05-03-042, § 16-350-035, filed 1/11/05, effective 2/11/05. Statutory Authority: Chapter 15.14 RCW. WSR 00-19-036, § 16-350-035, filed 9/12/00, effective 10/13/00; WSR 90-23-006 (Order 2058), § 16-350-035, filed 11/9/90, effective 12/10/90; Order 1331, § 16-350-035, filed 1/15/74; Order 1300, § 16-350-035, filed 3/26/73; Order 951, Regulation 2(d), filed 7/2/64; Order 890, Regulation 2 (part), effective 9/17/62.]