The purpose of this rule chapter is to minimize the spread of serious graft-transmissible diseases and certain other pathogens as well as nematodes of citrus by requiring all nurserymen propagating citrus to participate in a mandatory citrus nursery stock certification program. The requirements for program participation are established in this chapter. It is intended that there shall be no propagation of citrus nursery stock except as provided in this chapter, and it shall be unlawful to plant citrus nursery stock in Florida unless that citrus nursery stock has been propagated pursuant to this chapter.