I have literally searched everywhere and I cannot figure out what this is. I think it has to be some type of disease or fungus/mold. There is whitish green looking mold on the outside of my biodegradable planters but I am not sure if it is related. The leaves look great except for a few small white spots. (and now a few branches are starting to wilt away.) I tried cutting back on watering but then I would come home to sad wilted plants... The issue started with my Super Beefsteak BURPEE seedlings. It is on at least half of them and has spread to about 2 of my organic heirloom Homestead tomatoes. I am about 3 weeks from transplant time so I am not sure where to go from here...