This Primefact provides information about research results on graft-transmissible dwarfing (GTD) budlines which contain a GTD viroid that controls tree size. In the absence of a proven dwarfing rootstock for citrus, this method is used in high density citrus plantings where controlling tree size is essential for success.

The contents of this Primefact include:

• Background
• Overseas research
• Australian trials
• Guidelines and recommendations
• Inoculating trees
• Care of young trees after budding