Washington Administrative Code
Title 16 - Agriculture, Department of (See also Titles 24, 60, and 142)
SEEDS AND PLANTING STOCK CERTIFICATION
Chapter 16-350 - Registration and certification of fruit tree planting stock
Section 16-350-015 - Definitions

(1) "Indicator plant" means any herbaceous or woody plant used to index or test for virus infection.

(2) "Index" means to test for virus infection by means of inoculation from the plant to be tested to an indicator plant, or by any other method approved by the department.

(3) "NRSP-5" means the United States Department of Agriculture National Research Support Project 5.

(4) "Off-type" means appearing by visual examination to be different from the species or variety certified or exhibiting symptoms of a genetic or nontransmissible disorder.

(5) "Scion block" means a planting of registered trees which serves as a source of scion wood for the propagation of certified nursery stock.

(6) "Seed block" means a planting of registered trees which serves as a source of seed for producing rootstock used in the propagation of certified nursery stock.

(7) "Stool bed" means a clonal planting of self-rooted registered trees for the specific purpose of producing vegetatively propagated rootstock used in the propagation of certified nursery stock.

(8) "Virus-like" means a graft-transmissible disorder resembling a virus disease, including, but not limited to, diseases caused by viroids and phytoplasmas.

(9) "Washington certified nursery stock" means nursery grown seedlings, clonal rootstocks and nursery grown trees of the plant genera Chaenomeles, Cydonia, Crataegus, Malus, Prunus, Pyrus and Sorbus, that comply with the requirements of this chapter.

(10) "Washington certified seed" means seed produced on registered seed trees in compliance with this chapter.