Sooty Mold on Citrus Trees - This fungus grows on the sugary excrement of sap sucking insects such as white flies, aphids, mealy bugs and scales. The fungus will block out sunlight needed for photosynthesis which will cause the leaves to drop. This will stress the tree and reduce the amount of fruit produced by the tree. Though unsightly, the fungus does not make the fruit inedible. 
Contact Us today to schedule an appointment with our Arborist. He will be able to determine which pest is causing the problem, rid the tree of the pest and clean away the Sooty Mold to enable the tree to continue to grow and remain healthy.