never had a problem with mold or fungus till i used scotts weed and feed on my yard, it turned nice and green and everything was fine.about a week or 2 later after cutting the grass and collecting the yard waste, i put it in a pile(in a place where it got wet) and a few days later it ws all stinky and moldy fungusy and got fungus all over the place, all over trees ect, i was guessing it was from the ferts...

i killed it with milk, i only had to treat it once and it went away, also i cut back all the trees ect so the sun would cook it/dry it away