There is a whole slew of information in the world wide google about milk being used as fungiside and antiseptic....has something to do with the protines in it, but i guess it needs to be moxed with water at (i think it was a 1 part milk 3 parts water) ratio...and if used indoors can smell pretty bad, but had been used for i want to say i remeber atleast a hundred years (dont remember exactly how long, but a long time) and the lowfat is suppose to be better for spraying but orignally it was discovered from whole milk...