Because root rot(Phytophthora cinnommomi Rands) was a major threat to Taiwan avocado industry, root rot resistant stock propagation was very important. In this report, propagation of“Duke 7”by using “Franqueamiento”method was
tested. In order to study the effect of scion cut dates, scion storage period and dates of grafting on the percent of successful graft unions on two scion cut dates,“Duke 7”scions every one week storage were grafted to common seedling stocks and that is continued the following four weeks. It was showed that the treatment, the“Duke 7”scions which were cut on January 17 and grafted after stored two weeks, had 74.4﹪ percent of successful graft union, which was best of all the treatments. Both of the average of all the percent of successful graft unions of “Duke 7”through the five weeks during two cut dates at least couldattained 43.53 ﹪, but showed no statistically significant difference. To study the effect of regulators on the root inducing of shoots grown from scions, solutions which contained IBA 0 to 10,000 PPM or NAA 0 to 300 PPM, alone or in combination, were prepared and one thin piece of wood ,which previously dipped and saturated with one of those solutions, was inserted into the lengthwise cut, made from bottom to top through the shoots. Then those treated shoots were air layered. All treatments had 10﹪rooting shoots except the treatment which was treated with IBA 1,000 PPM, but all treatments showed no statistically significant difference.