DOTHIORELLA DOMINICANA, AN IMPORTANT MANGO PATHOGEN IN SOUTH AFRICA
Disease symptoms on the flowers have been known for many years in South Africa and were referred to as blossom blight. Initial symptoms of flower infection are a slight wilt followed by rapid drying out and partial or complete death of the inflorescence. The pathogen may continue to grow into the wood behind the killed flower axis and cause branch die-back. It can also directly infect branch tips causing die-back. On the fruit, it was associated with post-harvest stem-end rot and is frequently isolated together with Colletotrichum gloeosporioides from anthracnose lesions.
The pathogen overwinters in pycnidia formed in dead wood. No sexual stage of the fungus was found in this study.
The blossom blight disease caused by D. dominicana was well controlled with benomyl (0.025 % a.i.) sprays.