Calcium deficiency-Tomato

Symptoms
Light case of Blossom End Rot (BER). More severely affected plants show a dark, sunken zone on the blossom end of the ripened fruit. This zone is sharply delimited against the fruit. The fruits ripen prematurely and are not marketable.

Reasons
Calcium deficiency on the fruit, also called blossom-end rot (BER). BER develops in fruits that contain less than 0.08% Ca (healthy fruit contains 0.12-0.25 % Ca) . Water deficiency and therefore limited Ca support to the fruit may also be a cause of BER.