Bonide® Copper Fungicide

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Description

Copper-based fungicide for use in organic gardening. Helps suppress and control diseases like brown rot blossom blight, downy and powdery mildew, peach leaf curl, fireblight, rust, leaf spot, and more — for fruit trees, berry plants and vines, vegetables, and flowers. Ready to use. Label includes instructions for application as a dust or as a spray. Intended for use as a modern replacement for bordeaux.

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43 Questions
Why did you choose this?

LOOKS LIKE A VERY GOOD…

Copper Sulfate dust is what Weston Nurseries recommends for mildew on peonies, which we get every year. Stark says to apply when the peony shoots come up. I wish I had known that and could have if I…

My pear tree needs this

Will need it.

We have a serious leaves.curl desease on my peach tree, now is early June fruits already form , is it too late to apply the copper fungide treatment ?

Once symptoms of leaf curl appear, it is too late to control the disease that season. Fungicides are not effective against this particular disease after budbreak. Prune your tree this fall, remove and destroy the fallen leaves and pruning debris, and then make your leaf curl application (as directed by the product label) while the tree is dormant.

how much do i use to spray peach trees?

I have only used it on very young trees (apple, pear, peach and cherry). I mix the powder iwith water in a spray bottle and spray the leaves and stems/trunk with the spray so that a thin layer of spray is left behind. When it dries it looks like a dusting of powder. If you use too much it will just wash off in the next rain, so that is not a big problem (except wasting the product/money). The product is essentially non-toxic, so it will harm other vegetation when it washes out, and it will not pollute waterways (unless you dump the whole container in a stream, but who would do that!). Too little (if you can't see the dusting at all when dry) will not give you protection. Good luck and happy peaches!

Can this be mixed with dormant spray oil?

Yes, it can, and the oil actually helps the fungicide adhere to the leaves better than it would without the oil. The two will not interact in any harmful way.

how much does one bottle make in gallons?

There is no way to offer this information accurately because, depending on what you're spraying (apple tree, blueberry plant, etc.), the amount of product you use per gallon of water varies to a great degree. Take a look at the label here: http://www.bonide.com/assets/Products/Labels/l771.pdf

would this be a danger to my chickens?

Take the bottle to your local vet’s they can answer that question better than I cat

can copper be used on pear trees for fireblight ?

Here's an answer posted by another customer: "I have used the copper fungiside to treat Fireblight on a pear tree. I have seen no sign of it hurting birds that love to sit in the pear tree."

Just bought copper sulfate for curly leaf fungus. What is ratio of copper sulfate powder to water?

I mix equal parts water and copper fungicide powder. Mix well and let it sit over night. It doesn't mix with water very well. Then use the chart on the liquid version of copper fungicide (2 oz fungicide to each gallon of water) to treat peach leaf curl. Needs to be done twice while tree is dormant and without leaves. (I spray Thanksgiving and Valentines Day here in the midwest) If the leaves are curling now, spraying probably won't help.

On my pear tree i noticed black spots causing leaf curl, will copper fungicide stop it? Do I need to prune the pear back on the effected area or just pluck the leaves?

I recommend removing leaves with the worst spots and branches heavily effected. This should work on newly-infected leaves and branches if you get them early enough and apply it in larger quantities.

Dr F

How often would copper fungicide be sprayed on trees? I am new to this and read where other sprays are every few days during bloom period. Is Copper similar or just once?

Make initial application at silver tip. Apply every 5-7 days at green-tip. Do not apply after green-tip reaches 1/2”.

What is the shelf life of the copper fungicide?

Copper octonate is the active ingredient and according to an EPA document
shows no degredation after 15 months of storage. Given that this is a pretty common copper chemical and as long as it's not baked in the sun and kept dry I would imagine that the powdered form in this product is stable for a long time. Direct sunlight and high humidity in the container could cause it to break down over time but I store mine sealed tight in its container in my shed and after two years it still seems to work fine. I hope that helps, God Bless!

Customer Reviews

10 Ratings
4.4out of 5 stars
10 Ratings

Rated 5 stars by 70% of reviewers

Rated 4 stars by 10% of reviewers

Rated 3 stars by 10% of reviewers

Rated 2 stars by 10% of reviewers

Rated 1 star by 0% of reviewers

10 Reviews
Rated 5 out of 5
Dec 27, 2024
This item is needed for plant from disease and good price
Rated 5 out of 5
Sep 25, 2024
Works
Does what it's supposed to do pretty well. Can't complain
Rated 5 out of 5
Dec 8, 2022
Great product to keep on hand
Great product I keep on hand all year so I don't run out.
Rated 5 out of 5
Jul 18, 2020
Super effective
My peach tree had shot hole disease last year, caused most of leaves fell before peaches ripe. This year the peach tree exhibit the disease again in June. I bought this fungicide and applied just once and see a significant improvement, it stopped the fungi to spread right away. And then I applied two more times, now there are no more shot holes on the peach tree leaves. I expect a good harvest in fall. Thank you Starbros for providing this great product. For all the products I bought from Starbros they are better than any other brand. I will keep shopping from Starbros in the future.
Rated 5 out of 5
May 5, 2019
Works Good
Plants love it, works good on every plant I have used it on. Clears up whatever is ailing it, and then the plant seems to be healthier than ever. Just wished it was not So expensive.
Rated 5 out of 5
Aug 8, 2017
1st time user of this product
This is the first time for me using this product. It's capability seemed to match my problems completely. I was having a problem with my golden delicious apple tree. In a short time I can see much improvement and I would recommend this product to anyone for the proper application. Everything I have bought from Stark Bros. including apple trees have been excellent.
Dick Shelp
New Castle Va.
Rated 5 out of 5
Jan 19, 2017
Fungi
It works supper good I have used it on four trees three times will use it more this summer buy it it works very good
Rated 4 out of 5
Jun 2, 2016
Bonide Copper Fungicide
Perfect product it worked like magic with one spray
Rated 3 out of 5
Jun 27, 2018
Apples: Silver Tip only
By the time I ordered and got it, I'd missed the window for apple application (silver tip until green tip reaches a half inch, according to the instructions). I'll keep it and use it next year.
Rated 2 out of 5
Nov 22, 2018
I want be using the copper till January after the sap is down then again in early
March. Right before spring. I'm sure the coper fungicide will work fine. I will be pruning the trees in January then I'll will be spraying trees. Let's hope it will work. Think. Ron. Can't rat it till I try it.