First report of Fusarium oxysporum f. sp. cubense tropical race 4 associated with Panama disease of banana outside Southeast Asia.
In Jordan, Cavendish bananas are produced on 1000 to 1500 ha in the Jordan Valley. In 2006, symptoms of Fusarium wilt were observed and sampled for the isolation of Fusarium oxysporum f.sp. cubense (Foc). Morphological characterization, PCR assay and pathogenicity tests revealed the causal agent as Foc, tropical race 4 (TR4). This is thought to be the first report of TR4 affecting Cavendish outside Southeast Asia, is its northernmost outbreak, and represents a dangerous expansion of this destructive race. Currently, 80% of the Jordan Valley production area is affected by Fusarium wilt, and 20 to 80% of the plants are affected in different farms.