Viburnum beetle overwinters as eggs that are deposited in the bark of stems in late summer. These eggs hatch in late April-early May and the larvae begin feeding on the new foliage. When fully fed in late May-June, the larvae go into the soil to pupate. Adult beetles emerge in late summer and after mating, deposit batches of eggs in the woody stems.
Most of the damage is caused by the larvae during late spring. Adult feeding damage on the foliage is much less extensive than that of the larvae.