Corythucha spp. Stephanitis spp.
What are Lace Bugs?
Azalea lace bugs are small soft bodied insects (3mm) with large lacy wings. They can be found
clinging to the underside of leaf surfaces. As the bugs are so small they are usually not detected until damage is
noticed on the leaves. The eggs of lace bugs overwinter on the mid veins of leaves before hatching in spring. Lace
bugs are attracted to a wide variety of ornamentals such as azaleas, rhododendrons, viburnums, flowering quince,
crabapple and cotoneaster.
What are the symptoms?
Because lace bugs suck the juices from the leaf, they leave white or yellow spots or marks on the upper surface.
This will eventually give a silvery mottled appearance to the whole leaf, if they are allowed to continue feeding. As
the lace bugs feed, they also leave behind tiny black, hard varnish like droppings. Once leaf damage has occurred it
cannot be reversed, so proactive control measures are required.