USDA Forest Service Forest Health Protection, Southern Region Lace Bugs, Corythucha spp. Some of the more common species affected are sycamore, oak, elm, hackberry, and basswood. By the end of August, leaves attacked by these insects may be discolored and perform little photosynthesis, and may even fall from the tree. Identifying the Insect. Adults have broad, transparent, lacelike wingcovers.
Some species are beautifully colored.
Identifying the Injury. Adults and nymphs on oak leaf. Photo by James Solomon Heavily infested trees may be partially or full defoliated, especially during dry weather. The adults become active during the spring and lay eggs on the underside of leaves. After the eggs hatch, the nymphs begin feeding on the underside leaves.