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Item #:
206827605
Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening
85% of respondents would recommend this to a friend
Item #:
206827605
KRW 42309
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Imported from USA store
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Bonide’s Liquid Copper Fungicide Concentrate provides excellent control of various plant diseases with an organic, natural, plant fungicide formula that allows for expanded use patterns.
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What Stands Out
Organic Formula
Made from natural ingredients, this fungicide is safe for organic gardening, ensuring plants stay healthy without harmful chemicals, appealing to eco-conscious gardeners.
Concentrated Solution
The 16 oz concentration allows for multiple applications, providing effective disease control while being cost-efficient for gardeners needing lasting protection against various plant pathogens.
Versatile Use
Suitable for a wide range of plants, this fungicide effectively combats common diseases, making it ideal for diverse gardens, from vegetables to ornamentals, enhancing overall plant health.
Product Details
| Brand Name | Bonide |
| Unit Count | 16 Ounce |
| UPC | 798813012425 037321008118 799198412411 742117629797 |
| Global Trade Identification Number | 00037321008118 |
| Included Components | Captain Jack's Copper Fungicide, 16 oz |
| Item Type Name | OUTDOOR RECREATION PRODUCT |
| Manufacturer | Bonide Products LLC |
| Model Number | 811 |
| Part Number | 811 |
| Item Form | Liquid |
| Target Species | Fungus |
| Special Features | Breathable |
| Item Weight | 1.3 pounds (590 grams) |
| Liquid Volume | 16 fluid ounces |
| Active Ingredients | Copper Octanoate(Copper Soap) |
| Brand | Bonide |
Who Should Buy?
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Organic Gardeners
Ideal for those who want to maintain organic gardening practices while controlling plant diseases effectively.
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Homeowners with Plants
Perfect for homeowners who want to protect their ornamental plants from fungal infections without harsh chemicals.
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Fruit and Vegetable Growers
Beneficial for growers of fruits and vegetables needing to manage diseases like powdery mildew or blight.
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Chemical-Free Advocates
Not suitable for individuals seeking products with zero chemical inputs, as it contains copper.
Product Description
Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is Copper 4E Fungicide used for?
Answer: Copper 4E Fungicide is primarily used to control a variety of fungal diseases in crops, such as powdery mildew, downy mildew, and leaf spot. It functions as a broad-spectrum fungicide, making it suitable for use on many fruit and vegetable crops. Understanding its use is essential for growers aiming to protect their crops effectively. For instance, applying Copper 4E can help prevent the spread of fungal infections, ensuring healthier plants and potentially higher yields. -
Question:
How do I apply Copper 4E Fungicide?
Answer: Copper 4E Fungicide should be diluted with water according to the manufacturer's instructions and then sprayed on affected plants. Typically, it's recommended to apply the solution in the early morning or late afternoon when temperatures are cooler. Proper application frequency and timing are crucial to ensure maximum effectiveness. For example, applying it just before a predicted rainfall can help enhance its effectiveness against leaf fungi, ensuring that the crops stay protected. -
Question:
Is Copper 4E safe for all plants?
Answer: While Copper 4E Fungicide is suitable for many plants, it’s important to note that some sensitive species may experience phytotoxicity, resulting in leaf burn or damage. Always check the specific crop tolerance on the product label before use. For instance, although it works effectively on tomatoes and potatoes, it might be harmful to delicate herbs. Always ensure you test on a small area first if you're uncertain. -
Question:
Can I use Copper 4E Fungicide in organic farming?
Answer: Copper 4E Fungicide is often considered suitable for organic farming under certain regulations, given that it contains natural copper compounds. However, it’s crucial to verify compliance with local organic certification requirements before use. Its application can help control diseases organically, making it a preferred choice for many organic growers. For instance, if you are cultivating organic tomatoes, using Copper 4E can help manage fungal issues while adhering to organic standards. -
Question:
When should I apply Copper 4E Fungicide?
Answer: It’s best to apply Copper 4E Fungicide at the first sign of fungal disease or as a preventive measure before conditions become optimal for fungal growth, such as during periods of heavy rainfall. Regular monitoring of crop health is advisable to determine the best timing. For example, applying it during early spring can prevent diseases from establishing as your plants begin to grow. -
Question:
How does Copper 4E Fungicide work?
Answer: Copper 4E Fungicide acts by disrupting the metabolism of fungal cells, inhibiting their growth and reproduction. It’s a contact fungicide, meaning that it must be applied directly to the plant surfaces where the fungus may be present. By ensuring a thorough application, you can effectively create a protective barrier on your crops. This mechanism is particularly useful when preventative measures are taken before any visible disease signs. -
Question:
Can Copper 4E Fungicide harm beneficial insects?
Answer: Yes, Copper 4E Fungicide may be harmful to beneficial insects, including pollinators and natural pest predators, if they come into contact with it. Therefore, it’s crucial to apply it at times when beneficial insects are less active, typically early in the morning or late evening. For example, if you are targeting a pest issue while your plants are attracting bees, timing your application right can help mitigate any negative impacts on the local ecosystem. -
Question:
What precautions should I take when using Copper 4E Fungicide?
Answer: When using Copper 4E Fungicide, it’s essential to wear protective gear, including gloves and masks, to avoid skin and respiratory irritation. Additionally, ensure to follow the manufacturer's instructions strictly regarding dosage and application intervals. For instance, over-application can lead to copper buildup in soil, affecting plant health over time. Always practice safe handling and storage to ensure optimal efficacy and safety. -
Question:
How long does Copper 4E Fungicide remain effective?
Answer: Copper 4E Fungicide generally remains effective for around 7 to 14 days after application, depending on environmental factors like rain and humidity. This timeframe may vary based on the type of disease and plant crop. Monitoring conditions will help you determine when a reapplication is necessary. For example, during wet weather, you may need to apply more frequently to maintain disease control. -
Question:
Where can I buy Copper 4E Fungicide in TN?
Answer: You can purchase Copper 4E Fungicide through Ubuy in South Korea. Ubuy offers a reliable platform where you can find this fungicide among various other gardening products. Their wide selection and convenient shopping experience make it easy to get the products you need for your gardening and farming.
Bonide Sprays 811 Editorial Review
Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening is an effective remedy for common fungal issues, including powdery mildew and black spot on various plants. Users report significant improvements in their plants' health after applying this copper-based solution, making it a valuable addition to organic gardening practices. Its ease of use, requiring simple mixing into a spray bottle, further enhances its appeal, especially for those dealing with persistent plant diseases like peach leaf curl. While it boasts many positive reviews regarding its efficacy, some customers have noted minor issues with the product container being less than full and torn instructions.
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Pros
- Economical and easy to mix for use
- Effectively treats various plant diseases
- Helps improve plant health significantly
- Good quality solution for organic gardening
- Breathable formula ensures plant safety
Cons
- Instructions may be difficult to read if torn
Platform Trust & Buyer Confidence
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Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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kund
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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SAO JOHN
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
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KRW 42309
Order now and get it around Tuesday, September 08
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Features & Benefits
- Controls listed plant diseases using low concentrations of copper
- Labeled for disease control on roses, fruits, vegetables, ornamentals and turf
- Provides excellent control of blights, leaf spots, rust, mold, mildews, scab, and anthracnose
- Made in the USA
- Intended for residential use only
- Keep out of reach of children
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