Bonide Copper Fungicide 32 oz RTU. Copper fungicide/Bactericides are useful against many different plant diseases. Please read the label and use carefully. COPPER FUNGICIDE is .08% Copper Octanoate (copper Soap), 99.92% inerts. Labeled for fruits, nuts, vegetables and ornamentals. Effective for peach leaf curl, rust, black spot, fruit rot, powdery mildew, late blight and other diseases. 32 oz. Ready to use. Ship wt 3#.