I've been doing some research and so far this sounds like a good idea tell me what you think the hornworm moths lay eggs on the tomato plant so in theory an Insect Barrier say the "Agribon+ AG-15 Insect Barrier" google for details should stop them and with 90% light transmission it should let in enough light for the plants especially since last year they got sun burnt and tomatoes being self pollinating I shouldn't have to worry about keeping out pollinating insects.