We net our tomato plants & it keeps the moths from reaching the vines to lay their eggs/larvae. Tomatoes are self pollinating & don't need bees or butterflies to cross-pollinate so small hole netting like bridal veil netting keeps the tomato moths out! Keeps the chickens out of the plants too!I hate those tomato bugs! They destroy my garden!
Tomato Moth ~ pretty big so tiny tulle netting will keep it out of a tomato plant!

Trial & error we learned not to plant tomatoes too close ~ there are 6 plants in this 4'x8' garden bed & really comfortably should have only 4 plants.
Front garden bed 6 tomato plants overcrowded
Season's ending ~ the birds can play in the garden beds