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Bonide

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

  • Based on 6,627 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Sep 4
Order within 5 hours and 31 minutes
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Size: 1 qt


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 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


Item Form: Spray


Item Weight: 1 Pounds


Liquid Volume: 32 Fluid Ounces


Active Ingredients: copper


Brand: Bonide


Target Species: Fungus


UPC: 617407747232 037321007753


Global Trade Identification Number: 32, 53


Product Dimensions: 2.5 x 4.88 x 11.88 inches


Item Weight: 1 pounds


Department: Unisex-Adult


Manufacturer: Bonide


Country of Origin: USA


Item model number: 7756A


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Sep 4

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

    • Operation “Save Baby Meyer!”
Size: 1 qt
Review Image by Guest Guest
Review Image by Guest Guest
Review Image by Guest 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 by Guest Guest
    • Works great!
Size: 1 qt
Works great on my roses and zinnias. Good spray, kills bugs instantly and good price.
Reviewed in the United States on July 10, 2025 by linda kay
    • Appears to work well, leakage issue.
Size: 1 qt
Seems to be having an immediate response on my plants. However, probably a quarter of it leaked out.
Reviewed in the United States on June 26, 2025 by Amazon Customer
    • Worked perfectly for me.
Size: 1 qt
My peony leaves developed brown spots/ blotches over the past few years. Since it really detracted from the beauty of the plant, I researched on Google how to get rid of it and this was recommended. I followed the bottle instructing and I had zero brown blotches this year! It worked beautifully! My plants were absolutely gorgeous this year. Would buy again, and will. ... show more
Reviewed in the United States on July 9, 2025 by Tami
    • Works wonders on rose rust
Size: 1 qt
I bought this to control rose rust on June 3rd, 2025. Today is July 2nd, 2025 and the rose bushes that seemed lost to fungus have exploded with new growth and all have lots of new leaves, a few new stems, and at least one new bud, depending on the variety. The tea roses that were in okay shape almost need to be trimmed back, they've grown so much. This is despite numerous rainy days washing off the product. I intend to try this on my pear tree next; if it works, I'll update the review. Highly recommend this for rose rust, though I can't yet speak for anything else. ... show more
Reviewed in the United States on July 3, 2025 by Mike Williams
    • Broken spray tip upon arrival
Size: 1 qt
I haven’t used the product because the sprayer was broken when I tried to use it. I went to spray and the tip and cylinder plastic piece fell on ground.
Reviewed in the United States on June 24, 2025 by Sianna
    • Effective mildew killer
Size: 1 qt
I always keep this product in stock so I can immediately treat my plants when they get powdery mildew or other mold on their soil. It might take a few treatments, but it takes almost no time, and hasn't failed me yet.
Reviewed in the United States on July 10, 2025 by Camille Weidner
    • Effective fungicide
Size: 1 qt
I used this as a preventative measure in my ornamentals/trees especially the gorgeous Crimson Queen Japanese Maple. Very effective against powdery mildew. It's rather expensive but I think worth it. I may have to try the concentrate option.
Reviewed in the United States on June 14, 2025 by Luv4USA

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