Bonide Captain Jack Copper Fungicide Concentrate 16 oz — Organic-approved plant disease protection

Bonide Captain Jack Copper Fungicide 16 oz is a concentrated liquid copper formulation that protects vegetables, fruits, ornamentals and turf from a broad range of fungal and bacterial diseases and is approved for use up to the day of harvest.

This ready-to-mix liquid copper concentrate provides gardeners with an organic-approved option to manage common plant diseases such as powdery mildew, black spot, peach leaf curl, rust and blight. Formulated for home garden use, the product mixes with water and sprays onto susceptible foliage, fruit and ornamental plants to reduce disease pressure and protect new growth. Because it’s labeled for use on many edible crops and can be applied through harvest day, it’s a practical choice for vegetable patches, fruit trees and rose beds.

How does this copper fungicide protect my plants?

Captain Jack’s copper acts as a contact protectant on plant surfaces, helping prevent disease spores from establishing and spreading. It’s most effective when applied before or at the first sign of symptoms and after rain or heavy dew to maintain coverage. Regular applications at label rates help maintain a protective barrier on leaves, stems and fruit.

• Contact protectant that coats plant surfaces to inhibit pathogens
• Works against both fungal and certain bacterial diseases
• Reapply following heavy rainfall to restore protection

Which plants and diseases can I use it on?

This concentrate is labeled for a wide range of plants including vegetables, fruits, nuts, herbs, roses, ornamentals and turf. It lists control for common garden problems such as powdery mildew, downy mildew, black spot on roses, peach leaf curl and various blights and rusts. Always check the label for specific crop and disease instructions before treating.

• Safe for many edible crops when used according to directions
• Effective on ornamentals like roses and landscape plants
• Listed for turf applications to address certain diseases

How do I mix and apply Captain Jack Copper Fungicide?

The product arrives as a concentrated liquid that you dilute with water following the package directions. Use a sprayer to ensure even coverage of foliage, stems and fruit, targeting both upper and lower leaf surfaces where applicable. Wear recommended protective equipment and avoid spraying during extreme heat or when bees are actively foraging.

• Mix concentrate with water per label rates—do not exceed recommended concentration
• Thoroughly coat all plant surfaces for best results
• Apply at intervals specified on the label and up to day of harvest where permitted

Are there any safety or environmental considerations?

As a copper-based product, follow label directions to minimize residues and avoid overuse; excessive copper buildup can affect soil and beneficial organisms. Use protective clothing when mixing and spraying, and avoid drift to desirable plants and water bodies. Always rinse equipment and follow disposal instructions on the label.

• Approved for organic gardening when used according to label instructions
• Use personal protective equipment during mixing and application
• Prevent runoff and avoid application near water sources

Who is this for: Gardeners, small-scale fruit and vegetable growers, rose enthusiasts and home landscape caretakers looking for an organic-approved, easy-to-mix liquid fungicide. If you need a versatile product that treats a variety of fungal and bacterial problems and can be used safely on many edible crops through harvest, Bonide Captain Jack Copper Fungicide 16 oz offers a practical option to integrate into a disease-management plan.