Infectivity titration of Pseudomonas syringae pv. savastanoi (Smith) Young et al. on some cultivars of olive (Olea europaea L.).
Inoculation studies over two years with seven inoculum doses confirmed the resistance rankings of the three varieties used (Coratina more than Leccino more than Nocellara del Belice). Gall weight 135 days after inoculation varied significantly according to cultivar but not inoculum dose. Differences in resistance and gall weight amongst the cultivars were generally more apparent at low inoculum doses than at high.