Leather rot, caused by the soil-borne fungus Phytophthora cactorum, occurs when infested soil splashes onto developing fruit.
More information:
- Leather Rot
- Leather Rot of Strawberry (Ohio State)
- Notes on Strawberry Diseases: Leather Rot (OMAFRA)
- Strawberry Leather Rot (UC Davis)
Use these resources if you need additional help with diagnosis and to find solutions to your problem.