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How to Remove Sooty Mold from Citrus Trees

By Kelly Taylor ; Updated July 21, 2017
Sooty mold may grow on your citrus trees.
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Sooty mold 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 mold--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 mold with store-bought insecticides or homemade solutions.

Spray insecticide.
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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.

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

Make a homemade insecticide to spray on the leaves.
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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.


About the Author


Ever since Kelly Taylor understood what writing was about, she's enjoyed the process of it. Taylor has a high-school diploma and she took college courses along with obtaining two technical certificates. She has experience writing about gardening, spirituality, travel, science, and history through instructional websites and other publishing platforms.