Pennsylvania Code
Title 7 - AGRICULTURE
Part V - Bureau of Plant Industry
Chapter 115 - STANDARDS FOR SEED CERTIFICATION
Subchapter S - TREES
FIELD REQUIREMENTS
Section 115.442 - Unit of certification

(a) Seed method. Certification applies only to the seed crop in one particular year of the trees specified in the application. For certified or selected tree seed, each tree shall be identifiable in the field by number and its location and characteristics shall agree with the information supplied in the application. Boundaries of the seed-producing area and its isolation zone shall be distinct and unmistakable.

(b) Seedling method. Certification applies to one seedling crop grown from a particular lot of certified seed in a particular nursery bed or container, as specified in the application.

(c) Vegetative method. Certification applies to one crop vegetatively propagated from particular members of a certified clone in particular nursery beds or containers, as specified in the application. Each plant or tissue culture which provides a source of propagules shall be labeled with the clonal name, any other reference number and the date that it became a separate organism. If the members of a clone are planted in a row, it shall suffice to label both ends of each row.