Bonide Copper Fungicide

Bonide Copper Fungicide is an organic, natural chemical used to prevent and control certain types of fungal diseases on plants. It is used for a wide variety of diseases such as powdery mildew, downy mildew, black spot, leaf spot, and others. It is commonly used on vegetables, annuals, perennials, roses, and other plants.

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How to Use & When to Apply:

Use Copper Fungicide as a preventative early in the season. It stops spores from germinating and stops the spread of fungus diseases as listed on the label. Most of the time it requires repeated applications throughout the growing season depending on the disease(s) you are trying to control. For maximum effectiveness apply the liquid forms when leaves are dry and dust forms when leaves are slightly moist.

Pros to Using Bonide Copper Fungicide

  • It is a natural, organic product that is not made from synthetic chemicals
  • Preventative properties that make it a great chemical to spray early in the season to prevent damage from occurring
  • Can be used on edible crops (see label for specific instructions) as well as ornamentals
  • Controls a wide range of diseases

Cons to Using Bonide Copper Fungicide

  • Struggles when plant diseases are advanced–use early before you start to see disease issues or just as it begins.
  • Rule of thumb: Copper Fungicide prevents new fungal spores from germinating and stops current populations in their tracks. It struggles to fully control diseases that are well advanced.
  • Requires multiple applications in most situations, especially in moist/wet seasons when fungus is very active

Available Sizes:

Helpful Link: How to Use Pesticides in Their Various Forms 


32 oz Ready to Use Spray Bonide Copper Fungicide

This chemical is ready to use right out of the bottle. Simply buy and spray. It comes pre-mixed with water so there is no mixing required. Costs a little more per ounce of chemical than the concentrate but a little more convenient.

16 oz Concentrate Bonide Copper Fungicide

The Copper Fungicide concentrate requires mixing with water in a spray tank. Although this takes a little extra effort, it saves you money per ounce of chemical and is great for larger gardens when you have more plants to spray. Application is easier using a sprayer than the RTU bottle.

4 Lb Dust Bonide Copper Fungicide

The Copper Fungicide dust has the same active ingredient as the liquid forms but it comes in a dust. Some find it easier to apply. When applying the dust you want to make sure the leaves are slightly moist to ensure stickage to the leaves. Be sure to wear gloves and protective equipment in all cases but especially when breeze or wind is prevalent.

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Hello and welcome! I'm Matt and I started Mid Atlantic Gardening to help gardeners in the Mid Atlantic (and beyond!) with their lawn and garden problems and issues.

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