How to Apply Fixed Copper Spray to Trees

Some trees take decades to mature, but when they do, they provide food, offer shade and beautify lawns and gardens. Pests, bacteria and fungal diseases, which target all types of trees, stunt growth and reduce harvests. In some cases, infected trees may die. Spraying trees with a fixed copper fungicide helps prevent and treat most fungal and bacterial diseases, including fire blight, leaf curl and brown rot.

Sprayer with fine-mist nozzle

Instructions

- 1
  Control fire blight in apple trees with 9 pounds of copper spray in 275 gallons of water per 2 1/2 acres of trees. Apply copper spray to the entire tree at silver tip, or when the fruit bud scales separate at the tip.To apply the spray, pour it into the tank of a fine-mist fungicide sprayer. Hold down the trigger and sweep the wand over the tree's leaves and trunk to cover thoroughly. Spray the tops and undersides of the leaves. Apply the spray again after harvest.
- 2
  Prevent coryneum blight in apricot and peach trees by applying 20 pounds of spray in 275 gallons of water per 2 1/2 acres. Apply the spray in September after harvest.
- 3
  Control leaf curl in peach trees with 4 1/2 pounds of spray in 75 gallons of water. Apply the spray in spring, before buds form, or in fall, after the tree loses its leaves.
- 4
  Prevent fire blight in pear trees with 5 pounds of copper spray per 275 gallons of water per 2 1/2 acres. Apply spray when the pear tree's blossoms open. Do not use this treatment for Anjou pears.
- 5
  Control leaf spot and brown rot in sour cherry trees with 4 1/2 pounds of copper, 9 pounds of hydrated lime and 275 gallons of water. Application time depends on your area's spray schedule for cherry trees.
- 6
  Use copper spray to control tip blight, twig blight, leaf blight and needle cast in fir, spruce, cedar, pine and juniper trees. Apply 9 pounds of spray mixed with 275 gallons of water in the spring during new growth. Repeat the application every 10 days for one month.
- 7
  Control fire blight in crab apple, mountain ash, quince and hawthorns by applying 3 pounds of spray mixed with 275 gallons of water. Apply spray as the trees blossom. Repeat the application once in the summer.
- 8
  Use 6 1/2 to 20 pounds of spray in 275 gallons of water to control bacterial blight in hazelnut trees. Apply the spray in August or September, in mid-fall and early spring. Do not spray the tree; apply the copper only to the ground around the tree.
- 9
  Control bacterial blight in walnut trees with 9 pounds of spray per 275 gallons of water. Spray the entire tree once per month, May through August.

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