§ 115.443. Growing seed and plant material.
(a) Seed method. The following requirements apply to growing seed method material:
(1) Within 500 feet of seed producing trees there may be no tolerance for pollen-producing trees that have the potential for genetic contamination of the seed.
(2) Inadequate pollen production, dispersal or viability may be cause for disqualification if it jeopardizes the seed quality of the variety, in the inspector’s judgment.
(b) Seedling and vegetative methods. Locations and boundaries of nursery beds or other propagating areas shall be distinct and unmistakable. If plants are to be grown in containers, the varietal or clonal name shall be firmly attached to each container or a tree in it.
(c) Seedling method. The following requirements apply solely to growing by the seedling method:
(1) During the 12 months prior to sowing, only seed of the same certified variety or seed of an entirely different species shall be permissible in the soil.
(2) Seed containers shall be properly labeled at all times and handled so as to prevent mixed identities. To prevent contamination, seedling equipment shall be thoroughly cleaned before use.
(3) Isolation strips or barriers to immigration of seed of the same species from adjacent areas shall be maintained until germination is complete.
(4) If resowing is required, only seed of the same certified variety shall be added.
(d) Vegetative method. Containers or propagules shall be properly labeled with the clonal name at all times, and handled so as to prevent mixed identities. Tissue culture equipment shall be thoroughly cleaned before use, to prevent contamination.
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