Symptoms:

• The affected area of fruits becomes olivaceous-black and shrinks.
• Black dots appear at the centre of the spots represent the acervuli.
• On matured green fruits, small brown spots appear with greyish white centre which later turn to bigger lesions with large number of acervuli seen as black dots.

Epidemiology:

• Temp. between 20 and 250 C.
• Mycelial growth with sporulation takes place at pH 5.5 to 6.0.
• Wounding leads to more disease incidence.

Image Source: http://www.ivorychem.com/papers/MangoBrownSpotsManagementPaper.pdf