The fungus Colletotrichum acutatum
|How does it spread|
The fungus infects leaves and green fruit. After penetration it can remain dormant in the tissues.
Black spot may develop in fruit when they begin to ripen and in leaves when conditions favour disease development.
The main source of infection is spore masses produced on old, undecomposed leaves and shrivelled fruit. The spores are spread by rain splash, by overhead irrigation and on the hands of pickers. The fungus may also be introduced in diseased runners.
Fruit that show no symptoms at harvest may still develop black spot during transit or storage.
The genus Colletorichum sp. can cause anthracnose disease on many fruit crops such as:
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