blossom-end rot of tomato

Blossom end rot of tomato can be recognized by a often leathery brown lesion at the base of the tomato. Figure 1. Blossom end rot of tomato can be recognized by a leathery brown lesion at the base of the tomato.
Blossom end rot of red tomato. Figure 2. Blossom end rot of red tomato.
Blossom end rot of tomato. Figure 3. Blossom end rot of tomato.