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Leaf scorch (Diplocarpon earliana) is a fungal disease with early symptoms that resemble common leaf spot, but centers do not turn tan/white. Instead, spots develop black centers with dark spore masses. As spots enlarge, they become irregular or blotchy; leaf tissue turns brown and dries up; leaf margins often curl upward. Petioles, stems, and flower parts can also become infected. Diseased plants are predisposed to other stress factors. The fungus overwinters in plants and debris; it may also be introduced through tips and plugs. Disease becomes progressively worse in multi-year plantings, but is often a minor problem in single-year systems. 

Strawberry leaf scorch in planting.

(Photo: John Strang, University of Kentucky)

Strawberry leaf scorch close-up.

(Photo: John Strang, University of Kentucky)

Management:

• Begin with clean plant material. 
• Use proper sanitation.
• Remove infected leaves and debris.
• Increase air circulation to encourage leaf drying.
• Consider resistant cultivars. 
• Use fungicides if disease becomes severe.

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