For control of Powdery Mildew on many types of crops such as melons, squash, tomatoes, cucumbers, trees crops, grapes and flowers. GC-3™ is a FIFRA 25b exempt fungicide (Rule 40 CFR 152.25). GC-3™ has shown the ability in replicated field and greenhouse trials to control Powdery Mildew for 7-10 days with a 1% spray solution. GC-3™ is applied as a foliar spray and should be a great addition to a well managed disease program. It is made from 100% organic components so there is no danger of toxic effects to humans or animals.