rough-bark
noun
variants:
or rough-bark disease
Definition of rough-bark
1
: any of several virus diseases of woody plants (as cherry, apple, citrus) characterized by generalized roughening and often longitudinal splitting of the bark
2
: a disease of apples that is caused by a fungus (Phomopsis mali) and produces rough cankers on the twigs and branches
3
: a nonparasitic disease of fruit trees (as apples and pears) characterized by a general roughening of the bark and not by local cankers