Elaine, I did start them myself in new potting mix. Another reason I'm so disgusted by it. No way it should be showing up in the seedlings like that.
Doing some research online I see there's a product called Serenade. Bayer has a version. Supposedly it will control a lot of diseases. I'm sure I won't find it locally, but I may order from Amazon. I just don't know how much more effort I'm willing to put in trying to get a decent tomato. I tried Daconil on the spring plants and couldn't tell that it helped at all. Have you tried either of these? Supposedly Serenade is different than other fungicides and the reviews on Amazon are positive for the most part.