Spotted
Pelidnota, Pelidnota punctata (L.) (Coleoptera: Scarabaeidae)
The adult spotted pelidnota is a reddish-brown beetle with three black spots on each wing cover, and one on each side of the prothorax is 3/4-1 inch long. The adult beetle feeds on grape leaves, skeletonizing them. Large-scale infestations do not occur on grapes.
The larvae feed and live in decaying hardwood stumps, roots and logs, and do not harm grapes. The life cycle of this beetle requires two to three years to complete.
If the beetles are present in a vineyard, they are normally in plantings adjacent to wooded areas.
Current pesticide recommendations may be found Here