Major disease of apples and pears and forest hardwoods. Cankers girdle the tree and can kill saplings while lopping branches off older trees. These are necrotrophic and enter through wounds and bud scars. The spores are dispersed by rain and insects. Typified by callus growth and target shaped cankers.
Ascospores are abundant in late fall.
There are many anthracnose fungi but the most common and important is Colletotrichum anamorph of Glomerella . These form a complex of diseases of many crops and ornamentals - Rose, strawberry, grape, raspberry, citrus, apple soybean, banana, cotton, hickory etc etc. Including the Diplocarpon black spot of rose. Generally a problem under humid conditions cool to warm, often bad in greenhouses. The diseases often affect young tissue, leaves, shoots, flowers etc.