The Ugly and the Bugly: Blossom End Rot and Tomato Hornworm
If there are spots that develop and darken at the blossom end of the fruit when they are about ½ size or smaller, they are most likely due to blossom end rot (BER). A common malady in tomatoes, it also affects squash, peppers and melons. The spot may enlarge or remain small, but as the fruits develop, the spots become black and leathery. The tomatoes remain edible if the darkened areas are removed, but there are certain steps to take to avoid the continuation of BER.