Plum leaf scald: characteristics of the causative agent,symptoms, dissemination, control and prevention

Abstract The very slow-growing gram-negative bacterium, Xylella fastidiosa, inhabits the xylem and is vector-borne. It causes several diseases in plants, including plum leaf scald (PLS), which main limiting factor over years for crop expansion, both productivity cultivation areas Brazil. There little information about management control of disease. Brazilian breeding programs trees have launched few resistant cultivars. aim this work was to carry out a systematic review with current regarding PLS, characteristics causative agent, symptoms, transmission/dissemination, prevention. use certified propagation material, free from bacteria elimination infected plants are measures used vast majority commercial cultivars highly susceptible only interest any resistance. In 2017 Agricultural Research Rural Extension Company Santa Catarina ‘Zafira’ cultivar, first cultivar purposes that not naturally infected; however, it observed transmission occurs by grafting. Institute Development Paraná IAPAR-EMATER evaluated different crosses concluded ‘PR-1095’ genotype most did show foliar symptoms However, PCR test revealed presence bacteria, indicating probably tolerant. contrast, ‘PR 1142’, 1149’ 1260’ genotypes do or PCR, resulting resistance These been released, further studies still needed.