As used in OAR
unless the context requires otherwise:
(1) "Block" means a contiguous grouping of
plants separated by at least 10-feet from other contiguous groupings of
(2) "Clean cultivation"
means the site is bare earth or is planted with a grass (Gramineae) or another
crop approved in writing by the Department in which broad-leaved weeds are
"Department" means the Oregon Department of Agriculture.
(4) "G1" means the original plants (nuclear
materials) that have tested negative in the most extensive battery of virus
tests available, and subsequently maintained in isolation to prevent
(re)infection. Production and maintenance of G1 material must be in within a
system approved by USDA-APHIS or its official designee.
"G2" means plant material that is
propagated from G1 stock and maintained under the specific conditions outlined
to prevent (re)infection.
means plant material that is propagated from G1 or G2 stock to increase the
amount of source material available for producing virus-tested certified
nursery stock. G3 plants must be maintained under the specific conditions
outlined in OAR
to prevent (re)infection.
means plant material that is propagated from G1, G2, or G3 stock that will be
distributed for sale. When using seed for G4 rootstock production, the source
of seed must be approved by the Department.
(8) "Index" means to determine virus
infection by means of inoculation from the plant to be tested to an indicator
plant or by other scientifically acceptable means of detection.
(9) "Indicator Plant" means any herbaceous or
woody plant used to index or determine virus infection.
(10) "Off-Type" means different from the
cultivar as stated on the application for certification.
(11) "Oregon Certified Nursery Stock" means
G4 plant materials including nursery-grown seedlings, clonal root-stocks
originating from registered G2 or G3 trees, nursery-grown trees propagated by
using top-stock from registered G2 or G3 trees, and rootstock originating from
registered G2 or G3 trees, but is limited to the genera Chaenomeles, Cydonia,
Malus, Prunus, and Pyrus.
"Oregon Certified Seed" means seed produced on registered G1, G2, or G3 seed
"Registered Tree" means
a tree or clonal planting that has a registration number assigned to it by the
Department, and that has been inspected and tested in accordance with the
provisions of OAR
(14) "Scion-Block" means a planting of
registered G2 or G3 trees, which serves as a source of scionwood for the
propagation of Oregon Certified Nursery Stock.
(15) "Seed-Block" means a planting of
registered G2 or G3 seed trees, which serves as a source of seed for producing
rootstock used in the propagation of Oregon Certified Nursery Stock.
(16) "Stool Bed" means a clonal planting of
self-rooted registered G2 or G3 trees for the specific purpose of producing
vegetatively propagated rootstock used in the propagation of Oregon Certified
(17) "Virus" means
virus and virus-like pathogens including phytoplasmas, viroids, and graft
Infected" means the presence of a harmful virus in a plant or plant
(19) "Virus-Like" means
either a genetic disorder or nontransmissible entity.
(20) "Tissue culture" means a general term
for the cultivation of plants (cells, tissues, or organs) under aseptic
conditions in a synthetic medium in vitro. It also refers to the cultures
(21) "Tested" means
having been subjected to an official examination, other than visual, to
determine if pests are present or to identify pests.