Curved lace bug

The curved lace bug (Corythucha incurvata) is an insect species belonging to the order Hemiptera and the family Tingidae. These insects are well-known for their intricate, lace-like wing structure, which acts as excellent camouflage when they are feeding on the undersides of leaves.

This species primarily attacks a variety of woody plants, showing a strong preference for members of the Rosaceae family. They are considered significant pests in both ornamental landscapes and commercial orchards, where they extract sap from foliage, leading to rapid plant stress and reduced aesthetic or agricultural value.

The life cycle of the lace bug is typical for the family, progressing through egg, five nymphal instars, and the adult stage. They overwinter as adults, finding shelter in bark crevices or leaf litter during colder months. As temperatures rise in spring, they emerge to mate and initiate a new generation on the foliage of host trees.

Damage symptoms usually start as stippling or chlorotic spots on the upper leaf surface caused by the removal of plant juices from beneath. As the infestation progresses, leaves may turn yellow or brown, curl, and drop prematurely. The presence of dark, varnish-like excrement on the leaf undersides is a classic diagnostic feature of a lace bug colony.

Managing populations of this pest requires a proactive approach. Cultural practices, such as removing debris and maintaining plant health through irrigation and fertilization, are critical. If damage is extensive, application of systemic or contact insecticides is recommended. It is vital to target the early nymphal stages to break the life cycle effectively and protect the canopy of the host plants.