Andromeda lace bug

The Andromeda lace bug (Stephanitis globulifera) is a member of the order Hemiptera and the family Tingidae. These insects are recognized for the intricate, lace-like pattern on their wings and are considered significant pests of specific ornamental woody plants.

This species primarily targets various species within the genus Rhododendron, including azaleas and andromedas. They are most commonly found in garden settings and nurseries, where they exploit the sap of host plants, causing them stress and reducing their overall vigor.

The life cycle begins with overwintering eggs deposited within the leaf tissue. Upon hatching in the spring, nymphs congregate on the undersides of leaves. They progress through several instars, feeding throughout the process. Multiple generations per year can occur in warmer climates, leading to rapid population growth.

Damage is characterized by stippling or chlorotic spots on the upper leaf surface, which occurs as the bugs pierce the cells to extract chlorophyll. In severe cases, the foliage may appear pale, turn brown, and drop prematurely, which significantly compromises the aesthetic value and health of the plant.

Management strategies focus on the following:

• Monitoring the underside of leaves starting in late spring to detect early stages of infestation.
• Promoting plant health through proper watering and mulching to minimize environmental stress.
• Applying insecticidal soaps or horticultural oils for early, localized infestations.
• Using systemic insecticides containing imidacloprid or similar active ingredients if the population density is high.