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Lace Bugs

Pest and Diseases Image Library.bugwood.org/

Stephanitis pyrioides (Scott) - Adult(s) Immature lace bugs are active on broad-leaved evergreens such as andromeda, azalea and rhododendron. Feeding occurs on the underside of the leaf, producing varnish-like spots. On the topside of the leaf, yellowish-to-silverish stippling can be seen. Brown patches or black droplets of excrement, along with molted skins, are indications of a high infestation of this pest. The nymphs are black and spiny. Adults are 3-4mm long, green-brown, with intricate wings that appear to be lacy. Other lace bugs attack deciduous trees and shrubs. They are similar in appearance, but they over-winter as adults. Both cause similar damage to the plants. On the topsides of the leaves, yellow to silver stippling is evident and on the undersides of leaves brownish-black “varnish” spots can be seen. When planting azalea and rhododendron, choose shady spots. Higher degrees of damage, with higher populations, have been seen on plants that are grown in sunnier locations. Early detection of lace bug activity is essential for effective management. Their natural enemies are rarely abundant enough to effectively suppress damaging populations.

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