rough-bark

noun

variants or rough-bark disease

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

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