Fungal disease
Apple Scab
Also known as Apple scab
A common fungal disease of apple trees that causes dark, velvety spots on leaves and corky scabs on fruit.
Symptoms
- Olive-green to dark brown, velvety spots on leaves
- Leaves yellowing and dropping early in summer
- Dark, corky, scabby patches on the fruit, sometimes with cracks
What causes it
The fungus survives winter in fallen leaves and releases spores in spring rain, infecting new leaves and fruit.
What you can do
- Rake up and remove fallen leaves in autumn.
- Prune to open up the canopy so leaves dry faster.
- Choose scab-resistant varieties when planting new trees.
- If scab is severe every year, a fungicide in spring can help; follow the label.
Not sure it's scab?
Photograph one affected leaf and Plantulus will suggest the most likely problem, with a confidence score. It's free and needs no sign-up.
Check a leaf photoOther apple problems
General guidance only, not a diagnosis. Check product labels and local rules before using any treatment, and ask a horticultural specialist if a valuable plant is struggling. See the disclaimer.