General Hydroponics® Defguard® is an OMRI-listed biofungicide and bactericide for use in organic gardening that's effective against a variety of pathogens, particularly botrytis and powdery mildew. By colonizing the root hairs, Defguard prevents the establishment of disease-causing fungi and bacteria to protect against anthracnose; bacterial leaf blights; spots and specks; black mold; black spot (on roses); brown spot; fruit rot; and leaf spots. Can be applied up to and including the day of harvest.
