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Bonide

Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases

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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Jun 23
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Size: 32 oz (Pack of 1)


Features

  • Control fungus and disease in your garden with Captain Jacks ready-to-use Liquid Copper Fungicide!
  • 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-use in a trigger spray bottle! To use, shake well and thoroughly apply to affected plants and foliage. Please see product label for full use instructions.

Description

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 plants including 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. This product arrives conveniently ready-to-use in a trigger spray bottle. For best results, shake well and apply thoroughly to the tops and undersides of leaves and all plant surfaces on affected plants. Repeat every 7-10 days as needed. Please see product label for full use instructions.

Item Form: Spray


Item Weight: 1 Pounds


Liquid Volume: 32 Fluid Ounces


Active Ingredients: copper


Brand: Bonide


Brand Name: Bonide


UPC: 617407747232 037321007753


Global Trade Identification Number: 53, 32


Part Number: 775


Model Number: 7756A


Item Type Name: Bonide Liquid Copper Fungicide Ready-To-Use, 32 oz


Unit Count: 32.0 Ounce


Included Components: Captain Jack's Copper Fungicide, 16 oz Ready-to-Use Spray for Organic Gardening


Warranty Description: DISCLAIMER OF EXPRESSED AND IMPLIED WARRANTIES Buyer assumes all risks of use, storage and handling of this material not in strict accordance with directions given herewith.


Manufacturer: Bonide


Item Form: Spray


Target Species: Dog


Special Features: Breathable


Item Weight: 1 Pounds


Liquid Volume: 32 Fluid Ounces


Active Ingredients: copper


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Easy to use, helps control fungus Easy to use, helps control fungus
Size: 32 oz (Pack of 1)
Review Image by Amos
Review Image by Amos
Review Image by Amos
Got this for my lawn in Houston — humidity + heat = fungus all the time. This one is super easy since it’s ready to spray, no mixing or measuring. After a couple uses I could see it helping, especially stopping the spread. Not a miracle fix, but definitely useful if you keep up with it. I usually spray in the evening to avoid the heat. So far no issues with the grass. Would buy again if fungus comes back. ... show more
Reviewed in the United States on April 11, 2026 Reviewed in the United States on April 11, 2026 by Amos
    • Works great
Size: 32 oz (Pack of 2)
Product works great. However, I ordered the manual spray bottles for 2 fully grown lemon trees. My hand and forearms were worn out. Next time I'll be getting the hose attachable type. That said, my leaf curl problem disappeared with one application.
Reviewed in the United States on May 14, 2026 by Jeff
    • Helped Over Time: My Peach Tree is Thriving!
Size: 32 oz (Pack of 1)
I had a persistent red fungus attacking the leaves on my peach tree. It was aggressive and spreading fast. I used this product as directed and also pulled off the affected leaves. While I still saw some fungus after the first application, it was definitely reduced. Here’s the twist: This year, there’s zero sign of the red fungus, and my tree is bigger and healthier than ever. Did Captain Jack’s do the trick? Maybe! I can’t say for sure if it was the spray, the winter, or a mix of both, but I do believe this fungicide played a part in getting my tree back on track. It may not work overnight, but if you're consistent and patient, this product seems to help. A solid addition to your garden toolkit, especially if you're battling stubborn leaf issues. The smell is non-toxic. The bottle spray worked well. My peach tree is now two years old, so it's still relatively small. This bottle was more than enough for my one tree and many uses. ... show more
Reviewed in the United States on July 13, 2025 by RJ
    • This works!
Size: 32 oz (Pack of 1)
This works very well! My hydrangea leaves were not doing too well this season so far, I applied this once so far and already see a significant improvement.
Reviewed in the United States on May 10, 2026 by Cher5678
    • Operation “Save Baby Meyer!” Operation “Save Baby Meyer!”
Size: 32 oz (Pack of 1)
Review Image by Guest
Review Image by Guest
Review Image by Guest
Background: New England Zone 6a/6b (big snow, ice, and frigid winters), first attempt at growing citrus in container pot. I know, who up here even tries! Gourmet chef (or sad Wannabe) whom cultivates my own herbs for my dishes year-round. Subject: ~ 2’ tall Meyer lemon tree in container pot. Situation: Never used a fungicide before, but total success with Captain Jack’s de-bug product. For those new to the line, I can’t emphasize enough how important it is to read their products’ comprehensive brochures from beginning to end before using. I bought this copper fungicide product to help me combat what I suspect was early powdery mildew on my baby Meyer lemon tree. The tree is my very first citrus, in a container I immediately transpotted with bottom pebbles, Coast of Maine organic worm-casting potting soil, lots of perlite for better drainage and to monitor its roots through the clear plastic. Success! It was thriving all summer outside, and even exploded in new blooms and put out about 15 baby lemons, most of which dropped (because Meyers sacrifice when it senses its young stems can’t support). Then I brought it indoors to winter, still fruiting with three green globes, and placed it under one of my grow lights in a heated low humidity room. What baffled me was, despite my attention to the amount of natural light, temperatures, and minimal water it demanded, it was suddenly showing signs of mildew. To my surprise, the fungicide’s brochure explained how powdery mildew is unique and doesn’t require any water to take hold. It made sense. Remedy: I’ve cared for all of my indoor plants either where they are or in my kitchen sink. But being I’m so fond of this little lemon tree, it’s got thorns to kill, and I mean business, this one wasn’t going to be just a sink job. Armed with the Captain Jack’s fungicide, I first removed and pitched the topmost crust of soil and anything dead or remotely white, then sprayed-turnedover-sprayed the first few inched of soil, lower stems, and lower leaves in the sink. Then when dry, I moved it to the tub, massaged the top two inches of soil with more spray, and retreated the tops and underside of every leaf. I let it air dry. The most egregious white spots reappeared as it dried, but I resisted the temptation to spray it again, knowing the fungicide just takes time to work. I returned it to its place under its grow light (a Soltec canister beam). One week later, the Meyer Lemon’s leaves, while not out-of-the-woods, are showing signs of stability, if not improvement. New buds have emerged at many stem’s ends, and its spikes have grown and hardened, as if to protect its remaining nascent fruit. The fruit is looking good. 🍋 Another week later, the tree is looking great, with only a few tiny stubborn (or resistant) patches of powdery mildew (?) remaining. The 3 fruits look great, and all but one of the many new buds are growing. It’s lost no leaves since last week, and definitely thriving. I reapplied the fungicide spray again to the fruit, leaves, and soil. Conclusion, Captain Jack’s Copper Fungicide saved my Meyer Lemon. ... show more
Reviewed in the United States on November 22, 2024 Reviewed in the United States on November 22, 2024 by Guest
    • Clear solution containing copper soap?
Size: 32 oz (Pack of 1)
I applied it to an area of white rot in a cut area where a tree branch had been. Not large expectations but I was surprised it was a clear solution. Shouldn't Copper Fungicide have at least a little color (blue-green) to it?
Reviewed in the United States on April 25, 2026 by Cuthbert
    • Good Product
Size: 32 oz (Pack of 1)
I wasn't real keen on spraying but did a lot of research and this product seemed to be as 'organic' as organic can be. There was no smell. It did kill the bugs (not right away) but I did notice after a good coating the bugs were less. Good size and value for the cost. I have nothing bad to say about this product. Worked well on my grapevines and apple trees. ... show more
Reviewed in the United States on October 29, 2025 by S.P.
    • Works great so far
Size: 32 oz (Pack of 1)
Used it on my peach trees thy typically get really bad leaf curl. I only spray once in February and it seemed to have done the trick. This year no leave curl and my tree is looking really full and healthy!
Reviewed in the United States on May 3, 2026 by Mar

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