Jasmine lace bug

The jasmine lace bug (Corythauma ayyari) is a small insect belonging to the family Tingidae within the order Hemiptera. It is recognized by the distinct, lace-like reticulate pattern on its wings, which provides excellent camouflage against host leaves. This pest is a notable concern for jasmine growers and nursery owners in various warm-climate regions.

The primary host for this pest is the jasmine plant (Jasminum species). Adults and nymphs typically cluster on the abaxial (underside) surface of leaves. By feeding in groups, they can rapidly affect the health of the host plant, often going unnoticed by gardeners until the symptoms become severe and widespread across the foliage.

The biology of Corythauma ayyari is highly dependent on ambient temperature, with multiple generations possible during a single season. The female deposits eggs directly into the leaf tissues. These eggs, along with the nymphs that hatch, feed by inserting their piercing-sucking mouthparts into the plant cells to extract sap, which disrupts normal development.

Infestation symptoms manifest as chlorotic spots or stippling on the upper surface of leaves. As the population increases, these spots expand, causing the leaves to appear bleached or mottled. Eventually, heavily infested leaves turn yellow, wilt, and drop prematurely, which severely weakens the plant and reduces its ornamental value or flowering potential.

Management strategies for controlling the jasmine lace bug include:

• Early detection through regular inspection of the undersides of jasmine leaves.
• Application of systemic or contact insecticides during the early stages of infestation.
• Pruning and destroying severely affected leaves or shoots to reduce the population.
• Enhancing plant vitality through proper fertilization and irrigation to help the plant recover from feeding damage.