Brown rot of Apples

Symptoms:
Brown rot in the fruit, spreading out from wounds, especially those made by birds, codling moth and apple scab infection.
Affected fruit may remain hanging on the tree in a mummified state.
Buff-coloured pustules of the causal fungi on the fruit surface, often in concentric rings. Usually seen under wet conditions.
At flowering time the same fungi cause blossom wilt, where blossoms and leaves on fruiting spurs turn brown and shrivel.
Severity varies greatly from year to year, depending on weather conditions at flowering.
Biology. Fruit becomes infected through wounds. Affected fruits mummify and may remain hanging on the tree and where they touch the bark they cause small infections (cankers). The fungus remains in the dead fruit and cankers over winter and releases spores in the spring to cause the blossom wilt phase of the disease. These infections in turn release spores to infect wounded fruit.