This report gives details of the material collected during the fourth collecting mission. Further background information on this project is given in reports covering the first and second collecting missions, which took place in 1988. Method of collecting germplasm. Two or three suckers per cultivar accession were collected. These were carefully cleaned to ensure all damaged outer layers of tissue were removed and left to dry for 1-2 days. The suckers were then wrapped in newspaper and stored until sent back to Australia for tissue culturing, usually 1-2 weeks after being collected. Germplasm of the wild species was collected as seed wherever possible. This was kept inside the fruit and returned to Australia where embryo cultures were initiated from fresh seed extracted from ripe fruit. Excess seeds were dried for further storage.