Pest description and damage The carpenterworm larvae bore in the trunk and main branches. Discolored or bleeding limbs, branch dieback, and lumpy or gnarled trunks may be indications of carpenterworm infestation. Sawdust-like material (frass) and wood chips mixed with loose webbing on or around infested trees is typical. Trees with severe carpenterworm infestations are susceptible to wind breakage and may need to be removed.
For biology, life history, monitoring and management
See Table 4 in: