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Scab, Apple

Apple Scab

Scab, Apple
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Apple Scab the first lesions are seen in the spring and are usually on the underside of the leaves. Once the leaves open, the upper surfaces also likely to become infected. A lesion first appears as an area which is a lighter shade of green than the surrounding leaf. The lesion is usually circular and as it increases in size it becomes olive-colored or darker green.

The earliest visible signs on fruit is water-soaked areas which develop into velvety, green to olive-brown lesions. Infections of young fruit will cause fruit distortion, and fruit will often drop from the tree.

Fungicides for apple scab control you have two types, preventive (protectant) and curative if applied soon after infection, are capable of penetrating (systemic) the leaf and stopping further development of the fungus.