Answer: There's a tomato pest called a hornworm which is the larvae of a large moth. These caterpillars are large, and the same color as a tomato stem that they're sometimes difficult to see - until they start munching away at the foliage and fruit. Look for frass (bug poop) on the lower leaves or soil beneath your plant. (Little black pellets). If you find any, tomato hornworms are the culprits. The botanical Bt (sold as Dipel) will take care of the critters, or you can handpick them if you can find them. Best wishes with your tomatoes!
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