Green Magic is said to be a cleaner-degreaser, I don't know if anyone has asked for the SDS to see what's actually in it. Years ago Ultra Dawn dish "soap" was shown in an actual scientific study to have some effectiveness for daylily rust but it's worth remembering that the actual rust fungus is inside the leaves, what you see on the surface are the spores, the reproductive units. While cleaning products may well kill external spores they are not likely to reach any fungus inside the leaf that has not yet sporulated. Edit, of course Ultra Dawn is not actually labeled for use as a pesticide, I don't think GM is either but it should say on the label. In general the strobilurin fungicides are the most effective for daylily rust and are systemic so reach into the leaf.
