WAC 16-497-005. Hop disease quarantine—Definitions

(1) "Dangerous diseases" means: (a) "Arabis mosaic viruses" means a grouping of viruses that are polyhedral, have a bipartite genome and induce diseases such as bare-bine, spidery hop, split leaf blotch and hop chlorotic disease. In combination with satellite RNA, arabis mosaic virus induces hop nettlehead disease. (b) "Hop stunt viroid" means a group of viroids consisting of hop stunt viroid and its genetic variants. (c) "Ilar viruses" means a grouping of viruses, including apple mosaic virus and Prunus necrotic ringspot, which share common characteristics including spherical in shape, with genetic material in three different particles and commonly inducing ring spots in hosts. (d) "Powdery mildew" means the disease caused by Podosphaera macularis (WALLR.: FR) Lind = Podosphaera humuli (DC) Burrill. (e) "Verticillium wilt" means the disease caused by Verticillium albo-atrum Reinke & Berth, or hop strains of this organism. (2) "Department" means the Washington state department of agriculture. (3) "Director" means the director of the Washington state department of agriculture or the director's authorized representative. (4) "Hops" means Humulus lupulus L. (5) "Regulated articles" means plants and all parts (except the cones) of hops.