Please help- can these young plants be saved??

[luvmykitty]

Hello-
I have these young plants that are wilting badly, I suspect fungus maybe. Two days ago, they were slightly wilted, so I gave a bit of water to them, thinking that they were thirsty. The next day, it was a little worse. I have not watered today , the soil is moist, but the wilting is worse. The edges of the leaves are wilting first, then the whole leaf. The newer leaf growth is wilted, but some of the larger leaves are mostly ok. The stems are not spotted or blotchy- still nice and green. What do you think this is- and how can I treat it? What is safe to use on these young plants? They are about 5-6 in tall. Can they be saved? I have included pics- I apologize for the poor quality, they are a bit dark (no flash).
Thank you!!