SaferGro Mildew Cure Mildew Cure is a natural, organic fungicide that provides good control of powdery mildew on various crops and ornamentals. A powdery mildew fungus is an obligatory parasite and thus requires a living plant host. Powdery mildew colonies quickly render a flowery potted plant undesirable. Powdery mildew infects a wide range of plants and is often found on ornamentals, vegetables and fruit crops. Mildew Cure is derived from garlic extracts and other essential oils, these active ingredients are food grade materials. The US EPA has exempted Mildew Cure from registration under FIFRA Sec. 25b. It has no residue tolerance limits for any food crops, including fruits and berries. The US EPA has exempted Mildew Cure from registration under FIFRA Sec. 25b.