sooty blotch: Meaning and Definition of

soot'y blotch'

1. a disease, esp. of apples and pears, characterized by sootlike spots or blotches on the fruit, caused by a fungus, Gloeodes pomigena.
2. a disease of clover, characterized by black, crusty blotches on the underside of the leaves, caused by a fungus, Cymadothea trifolii.