Carpenterworm - Prionoxystus robiniae

Carpenterworm (Prionoxystus robiniae) infestations can severely affect oak trees. They typically only attack trees that are already stressed, so good cultural management practices are the best way to avoid infestations. Carpenterworms can be identified by the abundant frass and tunnel entrances at the base of the tree.  Below are some pictures from a recent encounter with Carpenterworms on a client's heritage oak tree.