Leaf scorch
The fungus (Diplocarpon earlianum) causes a disease which off as small purplish leaf spots.
Spots quickly fuse into large reddish purple patches on leaves, giving leaves a characteristic burned look.
More information:
- Reports on Plant Diseases – Strawberry Leaf diseases – (University of Illinois)
- Strawberry Leaf Diseases (Ohio State)
- Strawberry Leaf Scorch (OMAFRA)
Use these resources if you need additional help with diagnosis and to find solutions to your problem.