Synanthedon scitula (Harris)
Distribution: Most fruit-growing states and provinces in eastern North America.
Larvae dig tunnels in the trunk or burr knots, creating accumulations of reddish frass at the tunnel exits.
NY State Ag Experiment Station
The adult is bluish black with yellow bands and has clear wings (A), resembling a wasp. Larva is creamy white to pink with a sclerotized reddish head (B).