Some results of 50 years of research on the resistance to plum pox virus.

Over 300 references on the resistance of stone fruit species to plum pox virus (PPV) have been utilized for the summarization of relevant information in this review. Methods of testing PPV resistance, procedures of evaluation and characterization of PPV resistance as well as breeding of PPV-resistant cultivars are briefly discussed. Altogether 370 cultivars, hybrids and clones of plum, peach, apricot, nectarine and wild Prunus species are tabulated together with the authors who have reported on their immunity, resistance and tolerance.