It is caused by calcium deficiency and irregular watering. The disease occurs at the blossom-end of the fruit. It starts as a water-soaked spot that enlarges to become dark brown and sunken. The surface of the spot becomes dark and leathery. The rot is dry.
- Avoid water stress during early stages of fruit development.
- Apply lime in calcium deficient soils.
- Apply foliar sprays of calcium chloride.