Cerambycidae, Obrea tripunctata Plants Attacked Elm, dogwood, viburnum and many fruit trees. The larvae feed down the center of the branch making a long series of closely placed round holes for the exudation of frass. Periodically the larvae cut off portions of the twig from within and continues feeding on the green wood. Identification Larvae tunnel in live twigs.
Adults are cylindrical, with a black head, wing covers, and abdomen.
Thorax is orange with three black dots. Adults and Damage. Life History Adult borers appear in early June. They girdle the tips of branches and deposit their eggs on the living twigs near the girdling. Eggs hatch and the larvae enter the twig and bore down the center.