Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases, for All Plants
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Availability:
In Stock.
Arrives
Sep 30 – Oct 1
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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: 16 ounces
Liquid Volume: 32 fluid ounces
Active Ingredients: copper
Brand: Bonide
Brand Name: Bonide
Unit Count: 32 Ounce
UPC: 617407747232 037321007753
Global Trade Identification Number: 53, 32
Included Components: Captain Jack's Copper Fungicide, 16 oz Ready-to-Use Spray for Organic Gardening
Item Type Name: Bonide Liquid Copper Fungicide Ready-To-Use, 32 oz
Manufacturer: Bonide
Model Number: 7756A
Part Number: 775
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.
Item Form: Spray
Target Species: Dog
Special Features: Breathable
Item Weight: 16 ounces
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:
Sep 30 – Oct 1
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 32 oz (Pack of 1)
After the hard freeze in Florida this year, our palms were all looking very dead. I saw a YT video from a local palm tree grower that talked about how the capillaries that carry water in the tropical trees basically burst when they froze, so the plant has trouble delivering water to the cells. This damage and lack of nutritional/water uptake leaves the palms very vulnerable to fungus or rot infection which can kill the tree. I picked this up based on their recommendation and gave a good dose directly into the crown of every Roebellini palm in my and my neighbor's yard. Once new shoots started emerging, I trimmed off the dead fronds (the video said to leave the dead stuff as it can shield the core from any late freezes or UV damage to new tissue). All of them recovered with the exception of a couple of sections (Roebellinis usually have 2-3 separate tree trunks with one root ball-two of these lost one trunk). I hit the mango trees too and they are coming back slowly as well, although they took a bigger hit than the palms. I can't say for sure that this stuff was the only reason they came back, but they all look pretty healthy now so I think it was a good call. I didn't notice any obnoxious odor although I make an effort not to breathe in chemicals, but it's not nasty like some I've used. It was easy to apply, just spray it until you see some running down the area and you are good. It seems to have kept down the black dusty mold or whatever that buildup is off of the leaves of everything I sprayed it on, so that's a plus.
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Reviewed in the United States on July 25, 2026 by Mike L
Size: 32 oz (Pack of 1)
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.
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Reviewed in the United States on November 22, 2024 by Guest
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.
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Reviewed in the United States on July 13, 2025 by RJ
Size: 32 oz (Pack of 1)
This Bonide Captain Jack's Copper Fungicide spray works amazingly well. After applying it, I can already see my magnolia tree recovering and bouncing back. The ready-to-use bottle makes application quick and simple with no mixing needed. Highly effective organic option for protecting trees and plants—definitely a 5-star product!
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Reviewed in the United States on September 9, 2026 by David K. Clarke
Size: 32 oz (Pack of 1)
Purchased this because it was recommended to me in my gardening group as my tomato plants are experiencing early blight. After trimming 90% of the plant and having almost nothing left, I tried a DIY formula of dish soap, oil and baking soda, but the disease continued to attack my plants so I purchased this. The instructions on this organic copper spray say to cover the plants top to bottom, underside and top side, as well as the fruit. I did as directed and after only two days of use the blight disease seems to have been combated. I no longer have any curling leaves and no new spotted affected leaves or fruit. So far I would say that this worked and with only one treatment! Being it is premix, it’s very easy to use. The bottle did not leak at all, and the scent was not anything strong or overpowering. I like that it is organic because obviously I am spraying food that I intend to eat, and I also have pets. Overall, for the size of the bottle I feel like it is priced accordingly. I find this to be a quality product. Should anything change I will update my review.
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Reviewed in the United States on July 13, 2026 by SB
Size: 32 oz (Pack of 2)
This saved my last 5 zucchini plants after losing 7 of them. Sprayed leaves one evening and they looked renewed the next day. Marvellous! Love that it’s organic too.
Reviewed in the United States on September 6, 2026 by Lucy Rutland
Size: 32 oz (Pack of 1)
Would have a 4 rating, if it wasn’t for the inconsistent quality. The first batch ordered was of a lower concentration when compared to a recent purchase. The recent purchased spray/liquid was a darker blue, and was more effective. Noticed that the better quality spray came from a non local Amazon warehouse, whereas the weaker concentration spray came from a local warehouse. Will purchase the powder version next time to offset the inconsistencies with the premade spray.
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Reviewed in the United States on August 26, 2026 by V
Size: 32 oz (Pack of 1)
This Copper Fungicide has saved a plant for me...again! This time it's a big crape Myrtle that I thought was down for the count with dusty mildew. We had had weeks of rain and the air circulation is not great where it stands. I did cut the affected branches off and then sprayed the remaining branches, using over half the bottle. Lo and behold, it worked. This is an amazing product that has taken care of brown spot on jasmine, a euonymous bush and a jade plant. It's fabulous and affordable!
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Reviewed in the United States on July 11, 2026 by PJ