Doutorando: Daniel Winter Heck. Data: 09/04/2019, às 17:00 horas no Anfiteatro do ESB. Orientador: Eduardo Seiti Gomide Mizubuti. Fusarium wilt (FW), caused by Fusarium oxysporum f. sp. cubense (Foc), is one of the most destructive diseases of bananas. Great yield losses have been recorded for decades. Nevertheless, information about FW epidemiology is scarce. There is no basic information about the disease intensity, spatio-temporal pattern, spread mode and potential factors involved in these processes. This study aims to answer some of the epidemiology gaps to support the design of efficient management strategies. Initially, a survey was carried out in 30 banana fields in the main producing regions of Brazil. In total, 95 ha and more than 100 thousand plants were evaluated. Aggregation of FW was detected by all analytical methods in 33% of the fields. FW was more aggregated in high-input fields. N in leaves was higher in diseased plants and K, Fe, K:N and Ca:N were higher in healthy plants. The incidence of FW in bananas fields in Brazil is high and is affected predominantly by cultivar, foliar chemical and soil physical factors, such as clay, porosity and soil density. The spatiotemporal patterns of FW epidemics were studied in eight plots, totaling 5 ha, in Teixeiras, Minas Gerais state, Brazil. All plants were evaluated bimonthly to FW symptoms and spatio-temporal analyses were conducted. The monomolecular model best fit to the incidence data and aggregation was observed at small-scale patterns that increases with the incidence. However, the clusters of disease plants were randomly distributed in most plots. The possible aerial dispersal of Foc under field conditions was investigated and spores of the pathogen were caught in spore samplers. To investigate whether weevil borer (Cosmopolites sordidus; WB) was an effective vector of FW a comparative epidemiology study under field conditions and an association study between Foc and WB were performed. Incidence of FW was lower in the field where the population of WB was managed with Beauveria bassiana and higher degree of aggregation was observed. A great number of Fusarium spp. isolates were associated with WB but none was Foc. The design of efficient management strategies to mitigate the damage of R1 and the risk of introduction of TR4 require solid knowledge of FW epidemiology.Daniel