Blossom blight or wilt is the primary symptom. Conidia produced on infected blossoms and twigs infect wounded fruits as they mature. Sometimes the fungus spreads from infected fruit to young shoots.
Spore dispersal occurs by wind, water and rain splash, and by insects or birds.
The most common symptom is brown rot of apple and pear. Not all apple varieties are equally susceptible. Infected apples may be shiny and turn from tan to black as the disease develops. Blossom infections cause blighting of spurs. The flowers wilt, turn brown, and collapse.