(from the article `plant disease`) Blossom-end rot of tomato and pepper is prevalent when soil moisture and temperature levels fluctuate widely and calcium is low. Found on http://www.britannica.com/eb/a-z/b/80
A cultural deficiency created by a lack of calcium. Very closely related to extreme temperatures, uneven watering, and root damage. Most commonly seen in peppers and tomatoes. Found on http://www.encyclo.co.uk/local/20077
A blemish that causes rot (most often in tomatoes and peppers) on the blossom-end of the fruit, (opposite the stem end); usually the result of lack of calcium available in the soil or inconsistent water levels Found on https://www.encyclo.co.uk/local/23362