Any chance the wilting could be from the High heat in the tunnel? Then removing or opening the tunnel would help?

I know it can get about 110F in my Greenhouse, which now has no plants in it due to that high heat; it was wilting them.

Just resting them in the shade might see some rejuvination, if heat is the problem. Test the soil with a good moisture meter- the cumulative water might be too much, but test the soil right at the roots.

Thats my bet guesses.

D in colorado

col sprg maters - These seedlings are still in soil blocks. I haven't planted them in the garden yet. I keep the tunnel ends open, and now I'm venting a bit along one of the sides too, just in case. I also have a layer of white row cover over the plastic, to help keep it a little cooler. Almost all of them recovered after watering. I may have lost about 1 or 2%. But now I'm having the leaf problem, and I think it's probably some kind of fungus because I got the leaves too wet. I may have overwatered some of them a bit, after the wilting, and that may have had some kind of effect too. But I didn't overwater all of the seedlings that have the leaf problem.

I would spray with a fungicide. I used Safer brand here after my plants were having some serious droop issues after too much rain and I was concerned with it causing a fungal issue.

Most likely is Early Blight due to the overhead watering but its impossible to say for sure without at least a photo. You can find lots of photos of Early Blight both here and via Google for comparison.

Wet leaves = fungus infections, which is why overhead watering should be avoided. Add heat and poor air circulation to wet leaves and you can almost guarantee fungus infections.

Strip off the affected leaves, spray with fungicide (it won't cure but can help prevent spread of the spores), and eliminate the overhead watering. If it continues to develop pitch the plants.

Dave

ubergoober - I'm going to try some chamomile tea, and I also heard cinnamon might help. Cinnamon is great for colds too. I discovered that about a year ago, and haven't had my usual colds since. Ceylon cinnamon is better than cassia, since it has much less coumarin that can affect your kidneys. But both work for colds.

dave - Early blight was the first thing I thought of, but it didn't seem to match the pictures I looked at. But I guess it doesn't matter that much, since I'm just going to treat it like a general fungal problem. I don't think it's that bad, but if it doesn't improve, I'll just pitch the plants like you said.