This familiar beetle may be a severe pest of grape during the summer, feeding mainly on foliage and rarely on berries. The large, white, C-shaped larvae overwinter several inches below the soil surface. Males emerge one or two days earlier than females.
Adults are shiny green with copper-colored front wings.
Beetles skeletonize leaves of some varieties, or eat completely through the leaves of other varieties. Although feeding on fruit of some crops, such as peach , grape berries are rarely attacked. Feeding is concentrated in the upper part of the vine canopy. Peak adult activity is in July, but may continue into September. Eggs are laid in the soil, hatching in about two weeks.