I have 24 tomato plants: 20 are the variety call Celebrity, 4 are unknown varieties. All of them are in the same plots and treated the same way, once they were planted. All of them are heavy with fruit -- all green still, with more blossoms on their vines. On some tomatoes, there is a brown ring on the fruit, right under the curly, star-shaped 'cap' where the fruit grows out of the vine. So far, I have only found this on tomatoes that are Celebrities. However, not all of the Celebrities have the brown rings. For example, all fruit of a single plant may not be affected. I do not know if it is present on every single plant. Can you tell me what this brown ring is, what the fate of the particular tomato that has a ring will be and whether this will eventually affect all the tomatoes? Is there anything I can do to stop or reverse the condition? Does the condition render the affected tomato inedible? Will the condition prevent the tomato from ripening? What causes this to happen? One of the photos captures an insect at the affected part. Does it have anything to do with the problem? What can I do to avoid this in the future (apart from not planting tomatoes, which is not an option.) Thank you so much for any advice you can offer.