Oh, so there are also trellises of some sort. What else is there? It's also still it quite clear how this is configured - are these frustra surrounding each plant? Because that sounds like a lot of work for each tomato.

As for hornworms, best we've found is a daily sweep with a jar of soapy water for ritual executions.

hornworms are susceptile to parasitoids that target only them, but i dont know if you can even commerically purchase them.