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Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening

4.5 4.5 out of 5 stars 8,597 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Garden Fertilizers by Bonide

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Item Form Liquid
Item Weight 1.3 Pounds
Liquid Volume 16 Fluid Ounces
Brand Bonide
Target Species Fungus

About this item

  • 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.

Customer ratings by feature

Easy to use
4.5 4.5
Value for money
4.3 4.3
Accuracy
4.2 4.2
Flavor
4.1 4.1

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From the manufacturer

Captain Jack with tagline Protect Your Oasis and Bottle of Concentrated Copper Fungicide
Image shows copper fungicide can be applied during growing and dormant seasons to buds and flowers
For organic gardening, can be used indoors and outdoors on various plants
Nature Inspired Solutions from Captain Jack control plant diseases
Bottle of Captain Jack's Copper Fungicide Concentrate for Organic Gardening Bottle of Captain Jack's Ready-to-Spray Copper Fungicide for Organic Gardening Bottle of Captain Jack's Ready-to-Use Copper Fungicide Spray for Organic Gardening
Copper Fungicide Concentrate Ready-to-Spray Copper Fungicide Ready-to-Use Copper Fungicide
Customer Reviews
4.5 out of 5 stars
8,597
4.3 out of 5 stars
606
4.4 out of 5 stars
5,251
For Organic Gardening
Application Method Mix with water and apply using a sprayer bottle or pressure tank sprayer Attach to garden hose and spray directly on affected plants Use trigger sprayer bottle to spray directly on affected plants
Can be applied up to day of harvest

Product information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening


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Product Description

Liquid Copper Fungicide Concentrate

Controls 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.

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Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening
Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening
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Price-5% $17.98
List:$18.99
$49.98-28% $12.48
List:$17.30
$9.99-10% $23.99
List:$26.54
-28% $14.77
List:$20.49
Delivery
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Easy to use
4.5
4.8
4.7
4.0
4.7
4.7
Value for money
4.3
4.3
4.5
3.5
4.2
4.4
Accuracy
4.2
4.4
4.4
Sold By
Amazon.com
Monster Pets
MeterSupply LLC
Amazon.com
Amazon.com
Amazon.com
number of pieces
1
1
1
1
liquid volume
16 fluid ounces
473 milliliters
16 fluid ounces
1000 milliliters
32 fluid ounces
16 fluid ounces
form
Liquid
Liquid
Spray
Spray
Spray
Spray
weight
1.27 pounds
16 ounces
1 pounds
2.3 pounds
1.24 pounds

Customer reviews

4.5 out of 5 stars
4.5 out of 5
8,597 global ratings

Customers say

Customers like the performance, ease of use, color and that it's organic. They mention that it works well for flowers, mangoes and peach trees. They also say that it cures the early stage of blight and prevents its reoccurrence.

AI-generated from the text of customer reviews

339 customers mention287 positive52 negative

Customers like the performance of the fungicide. They say it works well for flowers, is very effective, and is amazing. They also say it saves fruit trees from fire blight and produces healthy new growth. Customers also mention that the product is easy to use and efficient in controlling spring fungus. They even say it's like a resurrection of their plants and that tomatoes are producing again.

"Works well on my peach trees" Read more

"This is like a resurrection of your plants! They love it and no bugs allowed!" Read more

"...of my problem, it allowed me to manage the issue and still maintain a somewhat healthy, fruitful, garden this year...." Read more

"I use this for my mangoes and found the results are a better crops when used properly. A little expensive but worth the end results." Read more

50 customers mention37 positive13 negative

Customers like the rust. They mention that it cured the early stage of blight and has prevented its reoccurrence. They say it stopped the bight in its tracks, and is one of the few products said to deal with bluster on tomato plants. Some say that it slows the Blight down and prevents it from setting in. Overall, customers are happy with the product and recommend it to others.

"...After some research I tried this and thank goodness I did, it helped stop and blight and while some of my plants struggled a bit still, the others..." Read more

"This stuff is amazing. Saved my fruit trees from fire blight. I use once every month or so, and my trees have never looked healthier." Read more

"...I have noticed this product has really slowed down the spread of the blight. I’ve applied it twice the last week and a half...." Read more

"My flowers looked aweful at the end of summer. The leaves were turning black so I’m hoping this does the trick for spring. Very easy to apply!..." Read more

44 customers mention36 positive8 negative

Customers like the value of the product. They say it's the best value for the money, saves money over pre-mixed stuff, and is more affordable than pre-made. Customers also say it helps keep their rose bushes looking nice and is a cost effective solution to fungal infections.

"Concentrate works just as well as the pre mixed. Better value mixing it up as needed. Really helps to keep my rose bushes looking nice." Read more

"This is the best way to buy this product as it a value per oz is unmatched. Works great for fungus on my perennials." Read more

"...Then we found this which has to be mixed, but is much more cost effective...." Read more

"I use this every year. Great product & company. Make sure it isn’t tampered with." Read more

40 customers mention40 positive0 negative

Customers find the product easy to use and mix. They say it's straightforward to use, and easy to apply with a hose-end sprayer. Customers also say it works fantastic and has no cons.

"...Was easy to mix and apply with a sprayer...." Read more

"Easy to use. WORKS quickly 1" Read more

"...Very easy to apply! No mess, I just mixed in my sprinkling can and applied.." Read more

"...It's pretty straightforward to use - mix 1/4 cut to 1 gallon of water and apply with a pressure sprayer...." Read more

18 customers mention13 positive5 negative

Customers like the color of the product. They mention that it makes their plants deep dark green, with no signs of blight. They also say that the leaves are bright green again in just a few weeks. Customers also say the product fights black spot on tomatoes and powdery mildew on cucumbers.

"...this fungicide and sprayed to my trees, within days, there are no more brown leaves. Very effective, highly recommend." Read more

"...The brown spots are still there on some leaves, but the leaves are green - so that seems like a good sign...." Read more

"...a fungus problem after repeated applications but it colors the leaves and everything blue." Read more

"...As it is, the spots are growing very, very slowly, a d new leaves are black-free." Read more

15 customers mention15 positive0 negative

Customers are happy with the organic content of the product. They say it's better than chemicals, great for organic care of citrus trees, and is organic gardening approved. Customers also mention that it'll stop blight in its tracks and is made of natural oil extracts and hormones.

"I really like this happy jack fungicide spray because it's organic. It works really well on my tomatoes make like grapes and also my flowers...." Read more

"...Like that it’s safe, made of natural oil extracts & hormones, and can be applied directly to fruits and vegetables...." Read more

"I really liked that this product is organic...." Read more

"...Both these products are organic which is better than chemicals. BTW, Bonide is also organic which should be used for fruits and other edible plants." Read more

29 customers mention15 positive14 negative

Customers are mixed about the disease. Some mention that it keeps the powdery mildew from getting worse, and is great for cucumber and squash. It also kills powdery mold on pumpkins, but it must be reapplied at least biweekly to keep it at bay. However, others say that it only has moderate success, with some fungal diseases still impacting their plants.

"This kept the powdery mildew from not getting worse, but didn’t necessarily get rid of it 100%. I think it would be best to use prophylactically." Read more

"Just not sure it worked. One plant is still diseased and I used several fungicides on it already, copper being the last one. None of them worked...." Read more

"...I also use it on ornamental plants. It does a good job suppressing powdery mildew but, again, does not eliminate the disease...." Read more

"...By the time I was able to plant them, they had become diseased with black spots and yellowing leaves...." Read more

16 customers mention8 positive8 negative

Customers are mixed about the toxicity of the product. Some mention that it's relatively non toxic, and is safe around humans, pets, and bees. However, others say that it is very toxic to the environment and can harm fish, aquatic invertebrates, and earthworms.

"Earth's Ally Fungicide is certified safe around humans, pets and bees by the Organic Material Review Institute (OMRI),...." Read more

"...2. This product has extreme safety warnings; however, you will become desperate enough to make peace with this limitation...." Read more

"...Its easy to use. I like the fact its relatively non toxic, though I wear old clothes I wash afterwards just in case... And spray at dusk to avoid..." Read more

"...I thought I was observing all precautions and still ended up with chemical burns on my arms and legs as well as conjunctivitis...." Read more

This saved my crop of over 100 tomato plants in NC.
5 Stars
This saved my crop of over 100 tomato plants in NC.
I have used this for several years on my tomato plants in NC. This product sprayed only ONCE saved all my tomato plants (between 75 and 150 plants) from being pulled up and discarded, year after year. Purchase this along with your seeds, soil and fertilizer in the late winter. Extremely important in hot and humid climates along the southeastern US seaboard.
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Top reviews from other countries

Product as described, fast delivery. Thank you
5.0 out of 5 stars Copper solution for fungus
Reviewed in the United Kingdom on March 15, 2024
Andrew Peel
5.0 out of 5 stars Peach curl.
Reviewed in the United Kingdom on November 28, 2023
Christine Timmons
4.0 out of 5 stars Fungicide
Reviewed in the United Kingdom on January 13, 2024
Geoff Bray
5.0 out of 5 stars Blight fungicide
Reviewed in the United Kingdom on October 9, 2023
MRS KAREN WATERS
5.0 out of 5 stars Copper fungiside
Reviewed in the United Kingdom on October 17, 2023