It can strip the leaves from viburnums in a relatively short period of time. Both the adult and larva feed on viburnums.
Symptoms Look for skeletonized leaves.
Both the adult and the larva feed on the leaves between the midrib and larger veins. This gives the leaves a lace-like or skeleton appearance. Plants which have been defoliated for 2 or 3 consecutive years may be killed. Closely examine the small twigs for egg laying holes and scars. Eggs hatch in May and the larvae begin feeding on the developing leaves.