Trees and shrubs: scab diseases

Scab diseases of trees and shrubs can disfigure the plant by producing unsightly dark spots on the leaves. Blossoms and fruit can also be attacked and the vigour of the plant reduced as a result of premature defoliation.

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Willow scab

Quick facts

Common name Scab diseases of trees and shrubs
Scientific name Mainly species of Venturia and Fusicladium
Plants affected Many, including apple, pear, poplar, willow, pyracantha, olive, Sorbus, loquat, medlar, cotoneaster, some Prunus species
Main symptoms Dark spots or blotches on leaves. Premature leaf fall. Aborted flowers and scabby or shrivelled fruit
Caused by Fungus
Timing Summer

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