Mango bacterial black spot (BBS)

Mango bacterial black spot is a major disease limiting mango production, which is now causing increasingly severe economic losses. 

BBS is a serious mango disease that may result in a 50% to 80% reduction in fruit production and therefore could become a limiting factor for the commercial production 

Symptoms

The causal agent of BBS (Xanthomonas axonopodis pv. mangiferaeindicae) infects stems, leaves, and fruit tissue through natural openings and wounds (Gagnevin and Pruvost 2001). Leaf lesions appear as raised black angular spots, frequently developing greasy margins following leaf venation, and often surrounded by a chlorotic (yellow) halo. Lesions may coalesce into large necrotic (dead) patches, and bacteria may ooze from the lesions during high-humidity conditions (Gagnevin and Pruvost 2001, Ploetz 2003). After several months of infection, leaf lesions dry and become light brown to ash-gray in color. Defoliation occurs in severe cases.

 

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