From a distance, the leaves appear to have a whitish cast. The leaves lose their green color, becoming pale and the undersides of the leaves may become speckled with brownish-black excrement spots and cast nymphal skins. Adults overwinter in bark crevices and other sheltered areas of the host plant. The adults become active about the time the new leaves appear. Females deposit the eggs on the underside of the leaves with hatching occurring in about 2 weeks.
Nymphs continue to feed on the host through all instars.
After about 30 days, the final molt takes place and the nymphs become adults. After mating, the cycle repeats. There are probably three generations in Kansas. Lace bug damage is more of an aesthetic distraction than an actual detriment to tree health. Treatments, if applied, need to be timed to prevent damage.