7 Pa. Code § 120.2
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Bureau-The Bureau of Plant Industry of the Department.
Department-The Department of Agriculture of the Commonwealth.
FTIP-Fruit Tree Improvement Program.
Foundation block-An isolated planting of registered trees, maintained by the Department to serve as the primary source of propagating material for commercial production.
Index-To test a plant for virus infection by means of inoculation from the plant to be tested to an indicator plant or by other standard procedures.
Indicator plant-A woody or herbaceous plant used for detecting viruses.
Nuclear block-A planting of indexed trees, maintained and continuously protected from virus reinfection in a screenhouse that serves as the source of propagating material for a foundation block.
Nursery increase block-A planting of nursery stock, originating from registered seed and scion sources, used for increasing registered trees.
Off-type-Possessing characteristics different from the variety or cultivar listed on the application.
Penn premium-certified-Department approved fruit tree nursery stock produced from registered rootstock and scion sources.
Penn standard-certified-Department approved fruit tree nursery stock produced from registered scion sources and nonregistered seed sources or from Department-approved scion sources and nonregistered rootstock sources.
Registered tree-A specific tree used as a seed, rootstock or scion source that has been routinely inspected and indexed by the Department and found to be free from detectable viruses.
Scion block-A planting of registered trees, maintained by a commercial nurseryman, that serves as a source of propagating material.
Seed block-A planting of registered trees, maintained by a commercial nurseryman, that serves as a source of seed.
Stool bed-A planting of registered clonally propagated trees that are used exclusively for producing vegetatively propagated rootstocks.
Virus-infected-The presence of a virus in a plant or plant part.
Virus-like-A disorder of unknown cause displaying symptoms commonly associated with known virus diseases.
7 Pa. Code § 120.2