Lace bug
Tingidae
135 host plants
Last updated
Lace bug adults and nymphs congregate on the undersides of rhododendron and Pieris leaves, causing stippled, yellowed patches on the upper leaf surface starting in late spring. The small insects (0.1 to 0.2 inch) have lacy, transparent wings and leave dark droppings on leaves below them. Heavy infestations cause severe leaf discoloration and drop, reducing plant vigor. Damage becomes apparent by mid-June.
Monitor rhododendron and Pieris foliage starting in May by checking leaf undersides. For light populations, a strong water spray dislodges insects. Apply insecticidal soap or horticultural oil targeting nymphs and adults; repeat every 7 to 10 days. Neem oil can be effective if applied to leaf undersides. Maintain plant vigor through appropriate watering.