Anthracnose: Gloeosporium papayae

Symptoms:

• The spots on fruits first appear as brown superficial discolouration of the skin which develop into circular, slightly sunken areas and 1 to 3 cm in dia.
• Gradually the lesions coalesce and sparse mycelial growth appears on the margins of the spots.
• Under humid conditions, an encrustation of salmon pink spores are released.
• Infection at early stages of fruit results in mummification and deformation.

Circular infection	Brown superficial discolouration	Anthracnose	Mycelial growth

Mode of spread and survival:

• The incipient infection is carried by the fruits from the field.
• The disease is spread through wind-borne conidia.
• Conidia are also spread by rain splashes.
• Severity of the disease on foliage is increased under conditions of excessive moisture.
• Lesions develop more slowly on the immature fruits than on the mature fruits.

Management:

• Foliar spraying with carbendazim 0.1 % at 45 days interval or
• Chlorothalonil 0.2 % at 10 to 15 days interval or
• Thiophanate-methyl 0.1 % or Mancozeb 0.2 % at 10 days interval controls the disease.
• Fumigation with bezylisothiocyanate controls post harvest spots and rots

Image source: http://www.padil.gov.au/pests-and-diseases/pest/main/136592#