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  • CONTROLS PLANT DISEASES - Liquid Copper Fungicide helps control powdery mildew, downy mildew, black spot, peach leaf curl, rust, and many other listed diseases.
  • PROTECTION FOR PLANTS - Designed for use on listed vegetables, roses, fruits, nuts, herbs, ornamentals and turf.
  • ORGANIC GARDENING - Approved and suitable for all of your organic gardening needs. It can even be used up to the day of harvest.
  • CONTAINS COPPER - The active ingredient of Liquid Copper is Copper Octanoate, or Copper Soap. Copper makes a great option for use on all of your plants.
  • EASY TO APPLY - Product mixes with water and should be applied using either a hose-end sprayer or tank sprayer. It can also be dusted for application. Carefully read and use according to label directions.

Bonide Copper Fungicide

Copper Fungicide helps control powdery mildew, downy mildew, black spot, peach leaf curl, rust, and many other listed diseases.

It is designed for use on listed vegetables, roses, fruits, nuts, herbs, ornamentals and turf.

The active ingredient of Liquid Copper is Copper Octanoate or Copper Soap. Copper is a naturally occurring chemical that makes it a great option for use on all of your plants.

Easy To Apply

Our product instantly mixes with water and should be applied using either a hose-end sprayer or tank sprayer. It can also be dusted for application.

Carefully read and use according to label directions.

About Bonide

Bonide has been trusted since 1926 in providing quality products and solutions for home, lawn, and garden pest problems.

Based out of Oriskany, New York, we continue to grow our reputation in the lawn and garden care categories by delivering results.

Our goal is to help consumers throughout their entire purchasing process by recognizing signs of trouble, developing products, and recommending solutions.

Product information 4 lbs

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Customer Questions

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Q: Will this work for Botrytis Blight on Peonies

A: The short answer is yes. Mix acording to directions and spray every 7 to 10 days BEFORE th…

katie neill raper | 8 years ago

Q: This says it is a replacement for Bordeaux mixture. Exactly how does it differ from the r…

A: This product is used as a fungicide. I use it to control early and late season blight on t…

katie neill raper | 5 years ago

Q: Is copper supposed to be in solution to be effective? If yes, how can the powder be effect…

A: You can either mix or use a duster like a dustmiser

Dan D. | 3 years ago

Q: How to use this?

A: I mixed it with water -- and a shot of detergent, I think--and applied it to my squash for…

self | 2 years ago

Customer reviews

4.5 out of 54.5 out of 5
1,681 global ratings

Top reviews from the United States

SJ and SF
5.0 out of 5 starsVerified Purchase
Great to prevent damping-off.
Reviewed in the United States on February 19, 2020
Size: 1 qt
Once seeds/sprouts have begun to dampen off, there''s not much one can do. (As far as I know.) Spritzing them twice a week with this stuff is probably not the healthiest if I were raising salad sprouts, but it definitely seems to stave off the surface-born... See more
Once seeds/sprouts have begun to dampen off, there''s not much one can do. (As far as I know.)

Spritzing them twice a week with this stuff is probably not the healthiest if I were raising salad sprouts, but it definitely seems to stave off the surface-born fuzz.

You will still need to watch out for root rot, but between a dash of hydrogen peroxide in the soil, and careful humidity management, I''d say I''ve cut my occurrences of seedling failure to a quarter of their previous levels. (damp and dim climates can be rough)
18 people found this helpful
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Kim
5.0 out of 5 starsVerified Purchase
Saving my peach trees
Reviewed in the United States on August 21, 2019
Size: 4 lbs
My peach trees had curly leave and were all but dead this year. Leaves out curl and fall, leaving the tree bare. Three applications and my trees look almost like new. I think one more treatment and we will be good to go. I thought my trees were goners for sure. Obviously,... See more
My peach trees had curly leave and were all but dead this year. Leaves out curl and fall, leaving the tree bare. Three applications and my trees look almost like new. I think one more treatment and we will be good to go. I thought my trees were goners for sure. Obviously, no fruit this year, but hopefully, next year!
20 people found this helpful
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Beck
1.0 out of 5 starsVerified Purchase
Made my plants look worse than the fungus did
Reviewed in the United States on May 12, 2020
Size: 1 lb
This review is for the powdered form. It left an unsightly residue on nearly every plant I sprayed. Did not wash off with rain or hosing down. Contacted Bonide for help and they said I must have applied in full sun (untrue) and suggested that I wipe every leaf with a wet... See more
This review is for the powdered form. It left an unsightly residue on nearly every plant I sprayed. Did not wash off with rain or hosing down. Contacted Bonide for help and they said I must have applied in full sun (untrue) and suggested that I wipe every leaf with a wet towel to remove the residue. Seriously. It has been weeks and my plants look terrible. Never again.

Also, the mixing instructions are strange and more work ( and math!) than I expected. They expect you to make 3 gallons at a time, measure out mountains of the powder (using a scale because your measuring spoon won''t reach), strain out the parts that refuse to dissolve, then frequently agitate while using.
11 people found this helpful
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Kathleen
5.0 out of 5 starsVerified Purchase
Excellent, Works Well On Cactus & Flowers
Reviewed in the United States on September 20, 2019
Size: 4 lbs
The copper dust works well on some but not all of my plants, I put the dust on my century plant cactus and it stopped the spread of black spot and rot, I did not think that anything could help black spot on cactus so I was very pleased with my results, I let the dust settle... See more
The copper dust works well on some but not all of my plants, I put the dust on my century plant cactus and it stopped the spread of black spot and rot, I did not think that anything could help black spot on cactus so I was very pleased with my results, I let the dust settle on each arm base and packed the root, I cut out the bad spots and made sure that the cactus was not getting too much water, 2 weeks later my cactus was healthy, the dust works well on my Cherry Carolina trees, the lantana plants and my Lilacs, be careful on other types of green leaf plants, the only bad thing about the dust is that it does separate and you have to get shaking it, I use a spoon and shake it well when I use it in the liquid form, I don''t think that the dust will spray well, you have to be careful becasue some plants leaves may get damaged, over all I may please, good value for the money, will buy again.
13 people found this helpful
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TD
5.0 out of 5 starsVerified Purchase
Game Changing Efficacy
Reviewed in the United States on April 26, 2017
Size: 1 lb
I''ve had terrible problems with black spot and other related fungi killing and otherwise marring my hydrangeas. But this year, I started dusting the entire bed with this stuff right as Spring sprung. The hibernating half-dead shoots from last year kept collecting dead... See more
I''ve had terrible problems with black spot and other related fungi killing and otherwise marring my hydrangeas. But this year, I started dusting the entire bed with this stuff right as Spring sprung. The hibernating half-dead shoots from last year kept collecting dead leaves no matter how often I raked so I just decided to leave them be and sprinkled them with this powder. Now that the dead leaves are gone and the weather is warm, I have gorgeous green hydrangea growth and not a single black spot or any other sign of any fungi. It seems like I''ve finally found the cure for persistent Midwest black spot and I couldn''t be happier.
16 people found this helpful
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Linda Alexander
5.0 out of 5 starsVerified Purchase
Great Product
Reviewed in the United States on June 25, 2016
Size: 1 qt
Used this product last year after the blight had already affected the tomatoes. It did control it from progressing. After speaking with a Master Gardener, he suggested to use it as soon as the tomatoes reach 3 foot tall, spraying weekly or after a heavy rain, whichever... See more
Used this product last year after the blight had already affected the tomatoes. It did control it from progressing. After speaking with a Master Gardener, he suggested to use it as soon as the tomatoes reach 3 foot tall, spraying weekly or after a heavy rain, whichever came first. So far, there is no blight, but my fingers are crossed.
30 people found this helpful
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K.Stanford
5.0 out of 5 starsVerified Purchase
this stuff worked and worked quickly.
Reviewed in the United States on November 19, 2017
Size: 1 qt
This was recommended to me by a friend that farms on 2 acres and he loves it. I tried it on my 3/4 acres of veggies this year when a fungus showed up. WOW this stuff worked and worked quickly. You can spray it on just about everything, just wash it before you eat it. If... See more
This was recommended to me by a friend that farms on 2 acres and he loves it. I tried it on my 3/4 acres of veggies this year when a fungus showed up. WOW this stuff worked and worked quickly. You can spray it on just about everything, just wash it before you eat it. If you are organic you can use this it won''t change your status. With the size of my farm I have now purchased the concentrate.
13 people found this helpful
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Adalard Stevenson
4.0 out of 5 starsVerified Purchase
Effective, needs reapplication after rain
Reviewed in the United States on September 24, 2014
Size: 4 lbs
Leaf spot diseases (Septoria and early blight) are endemic to this area, and growing tomatoes turns into an epic battle every year starting in mid August. Left alone, plants won''t survive past the start of September. I use a pump-up sprayer with about 8 heaping spoonfuls... See more
Leaf spot diseases (Septoria and early blight) are endemic to this area, and growing tomatoes turns into an epic battle every year starting in mid August. Left alone, plants won''t survive past the start of September. I use a pump-up sprayer with about 8 heaping spoonfuls of this powder mixed into 1 gallon of warm tap water. It does not kill fungal disease, but arrests its spread until the next rain. Two mild showers or one big shower rinse it off completely, making reapplication necessary.

In the fall, when misty/foggy weather happens overnight, the disease inevitably spreads, but copper fungicide will slow it enough that most of the plant is still healthy until frost.

It does not really dissolve in high concentrations, so you must frequently shake/invert the sprayer to keep the compound in suspension.

At fourteen bucks, this is by far the most economical way I''ve found to buy this stuff. Local retailers carry these ridiculously tall 1-pound jars for $8. For mixing with water, this is a lot easier to deal with.
26 people found this helpful
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Top reviews from other countries

Green_Nigel
4.0 out of 5 starsVerified Purchase
Did a good job on my Peach Leaf Curl
Reviewed in the United Kingdom on June 8, 2018
DId an excellent job of reducing the leaf curl on my peach tree. I bought this a little late in the year and missed the ideal time for the first application however the subsequent two applications have greatly improved the health and appearance of my tree (helped by dry...See more
DId an excellent job of reducing the leaf curl on my peach tree. I bought this a little late in the year and missed the ideal time for the first application however the subsequent two applications have greatly improved the health and appearance of my tree (helped by dry weather). Will be interested to see how much difference there is when I apply as frequently as recommended. Much better then faffing around preparing my own Bordeaux Solution.
2 people found this helpful
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MRS C B J CHALCRAFT
5.0 out of 5 starsVerified Purchase
this one is ideal and it''s a nice big size
Reviewed in the United Kingdom on March 12, 2016
I''ve been searching for this for ages in the shops but can never find one suitable for fruit plants, this one is ideal and it''s a nice big size. Well packaged to ensure no leaks and a quick delivery.
7 people found this helpful
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Mitty
5.0 out of 5 starsVerified Purchase
If you have Bonsai, buy Bonide.
Reviewed in the United Kingdom on September 16, 2017
If you have Bonsai you need this. Fungus diseases can ruin a whole group of \bonsai trees ; as the rain pours the fungus goes from one to another .it is so catching . I also ordered a bonsai recently and it arrived with fireblight !! It was heavy and it had nice form : so I...See more
If you have Bonsai you need this. Fungus diseases can ruin a whole group of \bonsai trees ; as the rain pours the fungus goes from one to another .it is so catching . I also ordered a bonsai recently and it arrived with fireblight !! It was heavy and it had nice form : so I stripped the leaves and re-potted it with a good coarse soil. Finished by giving it a spray of BONIDE. Super result , killed the blight ; I just gave it a second spray a week later. I had another Quince a year ago and used the same system , it is thriving and produced a tiny quince 2 weeks ago. You need this , so buy one
One person found this helpful
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NIGHT KITTY
5.0 out of 5 starsVerified Purchase
This product has what it takes to eradicate black spots on Magnolia
Reviewed in the United Kingdom on June 6, 2016
I have an evergreen Magnolia Grandiflora which, without treatment, suffers from a rash of black spots on the leaves which quickly leave it looking so ill that it could be on the point of death. The leaves become covered with these spots, rapidly go yellow and drop off. At...See more
I have an evergreen Magnolia Grandiflora which, without treatment, suffers from a rash of black spots on the leaves which quickly leave it looking so ill that it could be on the point of death. The leaves become covered with these spots, rapidly go yellow and drop off. At times I have felt the tree was going to die - nobody can diagnose the ailment. BUT a month after comprehensively spraying it with this spray, the fallen leaves have been replaced with new ones without spots. I am so grateful as it is a beautiful tree. But you have to keep using it.
4 people found this helpful
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Pink.Sara
5.0 out of 5 starsVerified Purchase
Stops Blight!
Reviewed in the United Kingdom on December 18, 2017
Stops Blight! Absolutely astounded that this stopped early and late blight in it''s tracks and saved my tomatoes. Nothing has ever saved a crop affected by blight previously but this works a treat.
2 people found this helpful
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