The fungus may grow into developing berries and remain dormant until they begin to ripen, at which point the berries shrivel slightly, and produce the characteristic fungal growth. This can happen after healthy-looking berries have been harvested. Avoid planting in foggy areas, or areas where there is little air drainage. Increase air circulation within the plant canopy by pruning. Avoid excessive nitrogen fertilization.
Some varieties are more susceptible than others.
Varieties with tight fruit clusters are more susceptible to this disease. See current recommendations for chemical control measures. Anthracnose Fruit Rot is another fungal disease, caused by Colletotrichum gloeosporioides . This fungus infects blueberries, apples, strawberries, tomatoes, and many other fruits and vegetables. Anthracnose can be a very serious disease on fruit, but can also cause disease on twigs and fruiting spurs.