WAC 16-350-030. Requirements for registered seed blocks

(1) The department will assign a registration number to each registered seed tree. (2) Prunus seed blocks must be located at least 100 feet from any nonregistered Prunus plants and any nonregistered member of the Rosaceae family. (3) The ground in a seed block and for a distance of 20 feet surrounding the seed block shall be kept clean cultivated or in grass ( Gramineae ) or another approved cover in which broad-leaved weeds are actively controlled. (4) The rootstock and scion sources of the seed tree shall have originated from G2 or G3 trees established under this program or from virus tested G1 trees originating through the NCPN-FT or other department-approved virus tested sources. If the tree is scion-rooted, its source shall have met the above requirements. Only registered trees shall be permitted in the seed block.