Tip Dieback of Mango (Mangifera indica) Caused byBotryosphaeria ribis

The conidial stage of Botryosphaeria ribis was isolated from diseased mango trees (Mangifera indica) and found to be pathogenic in mango by wound inoculation. The fungus produced dark mycelia and did not sporulate under most conditions but formed chlamydospores and immature conidial initials. In the vicinity of the inoculated stem scars, the fungus produced stromatic pycnidia, which yielded hyaline, one-celled pycnidiospores. On oatmeal agar, the dark mycelium also produced stromatic pycnidia. Hyphae were observed in sections of diseased tissues and abundant tyloses were found inside the xylem vessels (.)