Bark swellings, wounds, and frass on a white poplar trunk infested with larvae of the western poplar clearwing, Paranthrene robiniae, and carpenterworm, Prionoxystus robiniae.
Bark swellings, wounds, and frass on a white poplar trunk infested with larvae of the western poplar clearwing, Paranthrene robiniae, and carpenterworm, Prionoxystus robiniae. Credit: John F. Karlik
