A fungal disease (Venturia inaequalis) that produces olive green to black scabby lesions on apple leaves and fruit, disfiguring fruit and reducing its marketability even when the tree itself survives. It is the most economically important disease of apples in temperate growing regions worldwide and is a principal driver of fungicide spray programs in commercial orchards.
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Apple, Crops Apple scab (Venturia inaequalis) is one of the most widespread fungal diseases of apple worldwide.
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Also in Geography Atlas: where this subject is found.
Sources
1. Apple Scab (Wikipedia)
Wikimedia FoundationOpening definition paragraph
Apple scab is a common disease of plants in the rose family (Rosaceae) that is caused by the ascomycete fungus Venturia inaequalis. While this disease affects several plant genera, including Sorbus, Cotoneaster, and Pyrus, it is most commonly associated with the infection of Malus trees, including species of flowering crabapple, as well as cultivated apple.
lead description
A fungal disease (Venturia inaequalis) that produces olive green to black scabby lesions on apple leaves and fruit, disfiguring fruit and reducing its marketability even when the tree itself survives.
Article text
To reduce scab-related yield losses, growers often combine preventive practices, including sanitation and resistance breeding, with reactive measures, such as targeted fungicide or biocontrol treatments, to prevent the incidence and spread of apple scab in their crops.
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