1. (1) In addition to visual inspections conducted twice annually, all registered G2/G3 trees may be subject to diagnostic assays to determine the presence of targeted pests listed under this section.

2. (2) Testing will be prioritized as follows:

   1. (a) Symptomatic G2/G3 trees will be tested immediately by the department.
   2. (b) As funding allows, registered G2/G3 Prunus trees shall be tested by the department on a three-year rotation for Little Cherry Virus 1, Little Cherry Virus 2, Western X phytoplasma, Prune Dwarf Virus, Prunus Necrotic Ringspot Virus, and Cherry Leaf Roll Virus. Registered Prunus trees without testing in the previous 36 months shall not be used for budwood for production of certified trees.
3. (3) The department and entities authorized by the department will test registered G2/G3 trees by methods consistent with those utilized by the NCPN-FT or department-approved standards.

4. (4) G2/G3 trees may be tested for the following targeted pests if symptomatic for disease:

   1. (a) Pome fruit:

      1. (i) Apple mosaic virus;
      2. (ii) Apple chlorotic leaf spot virus;
      3. (iii) Apple stem pitting virus;
      4. (iv) Apple green crinkle associated virus;
      5. (v) Apple stem grooving virus;
      6. (vi) Apple rubbery wood virus-1;
      7. (vii) Apple rubbery wood virus-2;
      8. (viii) Apple luteo virus-1;
      9. (ix) Apple scar skin viroid;
      10. (x) Pear blister canker viroid;
      11. (xi) Cherry rasp leaf virus;
      12. (xii) Citrus concave gum-associated virus;
      13. (xiii) Tomato ringspot virus;
      14. (xiv) Tobacco ringspot virus;
      15. (xv) Generic phytoplasma;

   2. (b) Stone fruit:

      1. (i) Apple mosaic virus;
      2. (ii) Apple chlorotic leaf spot virus;
      3. (iii) Arabis mosaic virus;
      4. (iv) Cherry mottle leaf virus;
      5. (v) Cherry green ring mottle associated virus;
      6. (vi) Cherry necrotic rusty mottle virus;
      7. (vii) Cherry rusty mottle associated virus;
      8. (viii) Cherry rasp leaf virus;
      9. (ix) Cherry leaf roll virus;
      10. (x) Generic phytoplasma;
      11. (xi) Candidatus phytoplasma pruni (X-Phytoplasma);
      12. (xii) Hop stunt viroid;
      13. (xiii) Little cherry virus-1;
      14. (xiv) Little cherry virus-2;
      15. (xv) Prune dwarf virus;
      16. (xvi) Prunus necrotic ringspot virus;
      17. (xvii) Plum pox virus;
      18. (xviii) Tomato ringspot virus;
      19. (xix) Tobacco ringspot virus;
      20. (xx) Nectarine virus M;
      21. (xxi) Nectarine stem pitting-associated virus;
      22. (xxii) Plum bark necrosis stem pitting associated virus;
      23. (xxiii) Peach mosaic virus;
      24. (xxiv) Peach latent mosaic viroid;
      25. (xxv) Xylella fastidiosa.

[Statutory Authority: RCW 15.14.015. WSR 26-10-008, s 16-350-042, filed 4/27/26, effective 5/28/26.]