I quit going to my local university hort club plant sale, which was yesterday. The people working the sale usually did not know anything about the varieties they offered and they did not advertise which varieties they would have so I could not do any research ahead of time. That's why I'd mainly go, to try new and strange things. There were even years I struggled to find out when it was. They often didn't even have that information on their web site, the date and time of the sale. One time they called something that looked like a pepper a tomato. I got it and it was a pepper, a nice pepper but still!!! I try to support local and kids but they have to cooperate a little bit.
Something eating the tops is different than them wilting/dying. I'm not exactly sure what you are saying. I have had something, I think a rabbit or rat, go down a row of tomatoes and bite off the top or a leaf, drop it, and go on to the next plant. When I called the extension office they said it could be a beetle. I dusted them with Sevin and it stopped. I don't know if the Sevin had anything to do with it or not. I still think rabbit or rat.
Are stink bugs or some other sucking pests biting the plants and wilting the parts above? It seems to be early and they usually don't bother my tomatoes (maybe because they like my eggplant better) but have you checked for flea beetles or aphids?
Sometimes a cutworm or something will cut them just below the ground. The plant generally wilts really quickly but when you pull on them they come right up. A cutworm is not going to follow a row though.
There is some logical explanation but I don't know what it is. I did clean my glasses but my screen isn't that great. I have a bit of trouble seeing detail.