Bonide Captain Jack Copper Fungicide 16 oz – Organic Plant Disease Control

Overview

Bonide Captain Jack Copper Fungicide is a liquid copper-based concentrate designed to help protect a broad range of garden plants from common fungal diseases. This 16 oz bottle is formulated for easy dilution and even coverage, making it convenient to tailor applications to your organic garden routine without extra fuss.

With a heritage of trust dating back to 1926, Bonide combines practical design with field-tested efficacy. Captain Jack’s formula is versatile enough for diverse plant groups—vegetables, roses, fruits, nuts, herbs, ornamentals, and turf—so you can plan nursery-to-yard care with a single product. The product’s performance may vary with weather and garden conditions, but it’s designed to fit into typical seasonal care plans, including humid mornings and breezy afternoons when leaves are most exposed to disease pressure.

What it protects against

• Powdery mildew and downy mildew
• Black spot, rust, and peach leaf curl
• Other listed diseases common to home gardens

Key benefits you may notice

• Approved for organic gardening, supporting produce grown with organic practices
• Ready-to-mix concentrate that you blend with water according to the label
• Suitable for a broad range of plants: vegetables, roses, fruits, nuts, herbs, ornamentals, and turf
• Can be used up until the day of harvest, offering flexibility in timing

How to use

To apply, mix the concentrate with water following the directions on the packaging. Thoroughly coat the affected plants, ensuring even coverage on both upper and lower leaf surfaces. Reapply as directed by the label to maintain protection during active growing seasons.

About the brand

Bonide has delivered lawn and garden solutions since 1926 from Oriskany, New York. The Captain Jack line continues the company’s tradition of quality and service, helping gardeners manage disease with practical, field-tested products.