Scab first appears as velvety, dark olive to black spots on fruit, leaves, and stems. The fruit spots
become scablike with age and the fruit may become misshapen. On leaves, the infections cause leaf puckering
and twisting and eventually tear with age.
Early severe infections are of concern, but late-season
infections can be tolerated because peeling removes scabs.
Rake or remove leaves on the ground during the winter. Fall
foliar fertilizer applications of zinc and urea may hasten
leaf fall and reduce the number of spores in the spring.
Avoid sprinklers, but if you use them, irrigate between sundown
and noon of the following day to allow adequate leaf drying
before significant infection can occur.
For more information, see the Apple and Pear Scab Pest Note.
and leaf spots of pear scab
scabs on fruit