grapefruit tree is black - Knowledgebase Question

Kapaa, Ha
Question by kahuna6441
May 6, 2009
my grapefruit tree has a black mold??? on it. how can I help it. I do not use and chemicals on my plants.

Answer from NGA
May 6, 2009


Your tree is suffering from more than one ailment most likely. The sooty mold is a sign of certain insects such as scale, aphids, mealybugs or whiteflies. Summer oil sprays can help keep these in control if you follow label instructions for mixing and applying them, making sure to get thorough coverage when you spray. Repeated applications will be needed as oil sprays are not poisons but rather smother the pests and don't provide residual control. Or, you can hose your tree off every few days with plain water to discourage aphids and whiteflies. good luck with your tree!

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