This year my azaleas and sycamore leaves got a bleached-out appearance and the underside of the leaves was covered with black tar-like spots. What causes this?
Both azaleas and sycamore are susceptible to damage caused by an insect called a Lace Bug. Damage results from the insect sucking out cell sap, resulting in mottling of the leaf. The black tar spots are actually the insect’s excrements (ass). Control on azaleas can be accomplished with recommended sprays. Control on sycamore may be impractical if the trees are large. If no action is taken, the trees will defoliate early, but no permanent damage will result.
Related Questions
- Last summer, my azaleas got a bleached-out appearance and the undersides of the leaves were covered with small, black tar-like spots. What causes this and how do I prevent it?
- My azaleas and sycamore leaves have a bleached-out appearance and the undersides of the leaves are covered with tiny, shiny, black tar-like spots. What causes this?
- This year my azaleas and sycamore leaves got a bleached-out appearance and the underside of the leaves was covered with black tar-like spots. What causes this?
