Sick tomatoes

Sick tomatoes

First, thank you everyone who responded to my question about planting in salty sand. You're all so incredibly helpful. My newest problem is sick tomato plants. Does anyone know what this might be? It's happening only to my yellow pear tomatoes. I have several other varieties going, and they're all doing just fine. I'm wondering if this is a disease or some such and if I should toss them.
Random garden pics.

Random garden pics.

Chinese Lantern vs Deadly Nightshade

Chinese Lantern vs Deadly Nightshade

growing herbs from seed

growing herbs from seed

More mystery plants!

More mystery plants!

A little bit of pretty

A little bit of pretty

My Yard.

My Yard.