---
product_id: 792035347
title: "Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening"
brand: "bonide"
price: "€ 53.43"
currency: EUR
in_stock: true
reviews_count: 8
category: "Bonide"
url: https://www.desertcart.com.cy/products/792035347-captain-jack-copper-fungicide-16-oz-concentrated-plant-disease-control
store_origin: CY
region: Cyprus
---

# Safe to use up to harvest USDA organic-approved 16 oz concentrated formula Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening

**Brand:** bonide
**Price:** € 53.43
**Availability:** ✅ In Stock

## Summary

> 🌱 Defend your garden like a pro—Captain Jack’s got your back!

## Quick Answers

- **What is this?** Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening by bonide
- **How much does it cost?** € 53.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/792035347-captain-jack-copper-fungicide-16-oz-concentrated-plant-disease-control)

## Best For

- bonide enthusiasts

## Why This Product

- Trusted bonide brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Certified Organic & Safe:** Grow clean—USDA-approved for organic produce, perfect for the eco-conscious gardener.
- • **Harvest-Ready Protection:** Apply confidently even on harvest day—no waiting, no compromise.
- • **Gentle on Delicate Plants:** Effective yet safe for roses, herbs, and veggies—no burn, just bloom.
- • **Powerful 16 oz Concentrate:** Maximize your garden’s defense with a potent, easy-to-mix liquid formula.
- • **Broad-Spectrum Disease Control:** Stops powdery mildew, black spot, rust, and more—protect every leaf and fruit.

## Overview

Captain Jack Copper Fungicide is a 16 oz concentrated liquid solution designed for organic gardening. It effectively controls a wide range of fungal diseases including powdery mildew, black spot, and peach leaf curl. USDA-approved and safe to use up to the day of harvest, it’s perfect for vegetables, fruits, ornamentals, and herbs. Easy to mix and apply, this breathable formula protects your plants without harming delicate foliage.

## Description

Liquid Copper Fungicide ConcentrateControls powdery mildew, downy mildew, black spot, peach leaf curl, rust, and other listed diseases. Perfect for use on vegetables, roses, fruits, nuts, herbs, ornamentals, and turf. Incredibly easy to apply and can be used up to the day of harvest.About Bonide:Bonide has been trusted since 1926 as the leader in providing the best possible products and solutions for home, lawn, and garden pest problems. Based out of Oriskany, New York, we continue to grow our reputation as a leader in the lawn and garden care categories by delivering the highest quality products alongside our great customer service. Our goal is to help consumers throughout their entire purchasing process by recognizing signs of trouble, developing the best solutions, and recommending the perfect products.

Review: Great fungicide Captain Jack - This product is awesome, it stopped the fungus on my tomato plants with one use. Love it!!
Review: Great product for delicate plants - Works really well. Didn't burn even the most delicate plants. For a few to be on the safe sideI just added extra water. Even treated the soil.

## Features

- Control fungus and disease in your garden with Captain Jack’s Liquid Copper Fungicide Concentrate!
- Approved for organic gardening, this fungicide is suitable for the production of organic produce and can even be used up until the day of harvest!
- Copper Fungicide effective in the control and prevention of a wide range of plant diseases. Listed common garden diseases include blight, black spot, powdery mildew peach leaf curl and more.
- Apply copper fungicide to fruits, vegetables, ornamentals and other plants in your lawn and garden for complete and long-lasting disease control.
- This product arrives conveniently ready-to-mix! To use, mix with water according to package directions and thoroughly apply to affected plants. Please see product label for full use instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BSULSHA |
| Active Ingredients | Copper Octanoate(Copper Soap) |
| Best Sellers Rank | #324 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #12 in Insect & Pest Repellent Sprays |
| Brand | Bonide |
| Customer Reviews | 4.6 4.6 out of 5 stars (9,965) |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00037321008118 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 1.27 pounds |
| Item model number | 811 |
| Liquid Volume | 16 Fluid Ounces |
| Manufacturer | Bonide Products LLC |
| Product Dimensions | 2.13 x 4 x 6.75 inches |
| Special Feature | Breathable |
| Specification Met | USDA |
| UPC | 798813012425 037321008118 799198412411 742117629797 |

## Product Details

- **Active Ingredients:** Copper Octanoate(Copper Soap)
- **Brand:** Bonide
- **Item Form:** Liquid
- **Item Weight:** 1.3 Pounds
- **Liquid Volume:** 16 Fluid Ounces

## Images

![Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening - Image 1](https://m.media-amazon.com/images/I/716BOXqvOTL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Has anyone used this to prevent early or late tomato blight?  I lost a huge tomato crop last year and I need to try to prevent it this year.**
A: Yes, George!  I have used it the last couple years on my tomatoes and cucumbers and it really works.  Start using it early, even before any signs of disease and continue to spray it on every week.  Rotate your crop so you aren't planting were you had blight last year, it remains in the soil from year to year.  I also plant in black plastic to help separate the plant from the soil.  Be sure to spray the lower leaves the most.   Good luck!

**Q: what ratio water to concentrate?**
A: Low end for preventative and low density pest problems. Higher concentration if severe issue is present. Try to use the lowest concentration that works for YOUR situation. Read entire label carefully. Ask questions with YOUR county extension agent or Dept. of Ag State Inspector for your region. Saftey first.

**Q: Does this work on Damping Off root rot for seedlings?**
A: Being that you are talking about the seedling stage of growth, this product won't work.   Wait till the soil is warm to plant.   If the plants had leaves to absorb the product, then the Bonide would be beneficial to use, but it will take several treatments.  Keep in mind that rain or irrigation water will wash the product off the plants requiring retreating.

**Q: anyone use this for cedar rust fungal infection on Apple trees? thanks**
A: yes a copper fungicide will work . Always read instructions when preparing product knowing that more is not better

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great fungicide Captain Jack
*by J***B on January 24, 2026*

This product is awesome, it stopped the fungus on my tomato plants with one use. Love it!!

### ⭐⭐⭐⭐⭐ Great product for delicate plants
*by A***R on January 5, 2026*

Works really well. Didn't burn even the most delicate plants. For a few to be on the safe sideI just added extra water. Even treated the soil.

### ⭐⭐⭐⭐ Effective Fungicide That Controls Plant Disease but Requires Careful Use
*by S***N on September 3, 2025*

This copper fungicide does a good job of controlling plant diseases and keeping my garden healthier. I used it on vegetables and ornamental plants and noticed a clear improvement in preventing issues like leaf spots and blight. The concentrate mixes easily with water and sprays evenly with a standard garden sprayer. That said it does require careful use. If the mixture is applied too heavily or too often it can cause leaf burn or discoloration. Following the directions closely is important to avoid damaging sensitive plants. The bottle could also include a more precise measuring cap to make mixing easier. Overall this is a reliable and effective plant disease control product that works well when used correctly. It is a good organic gardening option but it is not completely foolproof and needs some caution in application.

## Frequently Bought Together

- Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening
- Chapin 20000 Made in USA 1 -Gallon Lawn and Garden Pump Pressured Sprayer, for Spraying Plants, Garden Watering, Weeds and Pests, Polypropylene, Translucent White
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---

*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-05*