Copper fungicides represent one of the oldest active ingredients developed to fight plant diseases. Some of the first fungicides developed contained copper and were used to combat diseases of vines (i.e., black rot) and fruit. In the 1800s copper sulfate pentahydrate was formulated with lime into Bordeaux mixture. Many other types of copper products followed with basic copper carbonate and copper ammonium carbonate first used in 1887, copper oxychloride in about 1900 and cuprous oxide in 1932.

Safer and more effective copper fungicides have been developed including copper linoleate (Camelot in 1964) and copper hydroxide in 1968. The copper products now used on ornamental plants are primarily Camelot, Junction, Kocide and Phyton 27. There are other copper products that are used in some portions of the ornamentals market.


Fungal diseases can be a real problem for gardeners, especially when the weather is warmer and wetter than usual. Copper fungicides are often the first line of defense, especially for gardeners who prefer to avoid chemical fungicides. Using copper fungicides is confusing, but knowing exactly when to use copper fungicide is the key to success. However, fungal diseases are difficult to control and results aren’t guaranteed. Let’s explore these issues.

Approved for organic gardening. Bonide Liquid Copper Fungicide controls a large variety of plant diseases including peach leaf curl, powdery mildew, black spot, rust, anthracnose, fire blight and bacterial leaf spot. Use on vegetables, roses, fruits and turf. Can be used up to the day of harvest.

Uses/benefits of Copper Fungicide Spray

  • Easy to use
  • Can be used on fruit, vegetables and ornamentals
  • Makes up to 66L of spray
  • Controls leaf curl, leaf spots, blights, downy mildew and many more

A broad-spectrum fungicide for control of a wide range of diseases on fruit, vegetables and ornamentals.

Features of Copper Fungicide Spray

  • 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. This natural fungicide is designed to be safely used around people and pets.
  • Contains copper – The active ingredient of liquid copper is copper octanoate, or copper soap. Copper is a naturally occurring chemical which makes it a great option for use on all of your plants.
  • Easy to apply – Product instantly mixes with water and should be applied using either a hose-end sprayer or tank sprayer. Carefully read and use, according to label directions.

Direction for use:

Mix 0.5 to 2.0 oz. Liquid Copper per gallon of water. For best results, start spraying before the disease is visible or when it is first noticed on the plant. Spray all plant parts thoroughly, and repeat every 7-10 days. If possible, time applications so that at least 12 hours of dry weather follows application. Will NOT burn plants.

Mode of action

Copper fungicides work to kill pathogen cells by denaturing enzymes and other critical proteins. However, copper can also kill plant cells if absorbed in sufficient quantities. Low solubility “fixed” copper fungicides, when sprayed on plant leaves will dry and then will release copper ions in small amounts every time the leaf is wetted. These released copper ions are what will kill pathogen cells and also have the ability to kill plant cells. To cause damage to plant cells, the copper ions must move from the plant surface and penetrate plant cells.

  • CAUTION: DO NOT allow pets and children to enter treated areas until spray has dried. DO NOT allow chemical containers or spray to get into drains, sewers, streams or ponds.

Prices of Copper Fungicide Spray

$19.16 – $35.33

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