Secondary organisms invade the affected tissue and cause the fruit to rot. Wide fluctuations in soil moisture levels impair calcium uptake by the root system. Excessive nitrogen fertilization may also contribute to blossom-end rot. Avoid over- fertilizing with nitrogen. Later, the affected tissue dries out and collapses, forming slightly sunken, wrinkled areas.
Secondary organisms invade the affected areas causing the fruit to rot.
Sunscald occurs on fruit exposed to the sun during periods of extreme heat. Grow tomatoes in wire cages. Plants grown in cages provide good foliage protection. Also, control foliar diseases of tomatoes and peppers which may defoliate the plants and expose the fruit to direct sunlight. The splitting results from a build-up of water pressure.