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lace_bugBoth adults and nymphs injure the host by piercing the epidermis of a leaf and sucking fluid from plant tissue. The removal of plant juices causes foliar discoloration, reduced plant vigor, and premature leaf drop. Feeding by nymphs and adults on lower leaf surfaces results in a chlorosis or stippling visible on the upper surface. This damage may sometimes be confused with that of mite injury. Lace bug injury, when observed closely, reveals chlorotic flecks that are larger than those caused by mite attack. The underside of the leaves will sometimes reveal the nymphs or adults, cast skins, and the excrement, which is black with a varnished appearance. When azalea and rhododendron are grown in a sunny location, heavy lace bug populations and their associated foliar damage may occur. Well timed sprays or soil treatment with systemic materials will keep your shrubs protected.