Garden Dust Fungicide for Organic Gardening. For controlling early and late blight, coryneum blight, peach leaf curl, powdery mildew, black spot, leaf spots, downy mildew, anthracnose and certain other fungal diseases on various vegetables, flowers, ornamental and fruits. Won’t burn plants. Powder can be diluted and used as a spray. 1 pound shaker, 16 oz concentrate, 32 oz RTU or 32 oz RTS. Copper Sulfate 7.0% or 16 liquid concentrate or Qt RTU; Copper Soap 10%.