Control common plant diseases in your lawn and home garden with Captain Jack’s Ready-to-Use Liquid Copper Fungicide. Approved for organic gardening, Copper Fungicide can be used on a variety of listed fruits, vegetables, nuts, herbs and flowers, and can even be applied up to the day of harvest. Captain Jack’s Copper Fungicide is effective against common fungal diseases including downy mildew, black rot, leaf spot, powdery mildew, blight, peach leaf curl and more. 

Keep in mind that a fall application of copper fungicide can be beneficial, particularly during the dormant period of fruit trees, as it helps control overwintering diseases and pests. Copper Fungicide is effective against diseases like downy mildew, late blight, and citrus scab. Copper ions kill by denaturing proteins and enzymes in cells of pathogens they contact that have not yet infected the plant. Copper Fungicide is the only organic option currently approved to be effective against downy mildew and late blight but is a heavy metal so should be used carefully.