Occurrence of stem and shoot cankers caused by Phomopsis fukushii on mango

In July 2014, an outbreak of stem and shoot cankers was observed in mango experimental plots in Jeju, Korea. Initial disease symptoms were dark or reddish brown stem and shoot cankers on branches and leaves. Dieback symptoms followed in the areas above the lesions, progressing to development of numerous small white-brown pycnidia. The causative agent was initially identified as Phomopsis fukushii based on morphological characteristics, colony appearance, and shape of alpha and beta conidia of isolates recovered from cankers. Further confirmation was obtained by assessment of DNA sequences of internal transcribed spacer regions and translation elongation factor and actin genes.