How to remove sooty mold from citrus trees

Written by kelly taylor
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Sooty mould indicates that your citrus trees have an insect infestation. It is usually found on the bottom of a tree's leaves. The insects that cause sooty mould--mealybugs, whiteflies and aphids--are typically more active during cooler weather. Mold forms from a honeydew secretion that the insects leave after feeding on the tree. You can remove sooty mould with store-bought insecticides or homemade solutions.

Skill level:

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Things you need

  • Big Buster insecticide
  • Liquid Gold Copper
  • 1 cup cooking oil
  • 1/2 cup water
  • Dish soap

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  1. 1

    Spray both sides of infected tree leaves with Big Buster insecticide. Use a second treatment 10 to 14 days after your first application if your trees have a severe infestation.

  2. 2

    Spray your trees with liquid Gold Copper when mould develops. Apply it only to infected leaves. Stop a large outbreak by respraying infected leaves 10 to 14 days after the first treatment.

  3. 3

    Mix 1 cup of cooking oil with 1/2 cup of water. Place a small amount of dish soap in the mixture, then spray it on the infected leaves. This homemade spray will smother the insects.

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