Insect identification > Coleoptera > Rhynchophora > White-pine weevil

White-pine weevil


The white-pine weevil (Pissodes strobi Peck). - This native enemy of the pine occurs practically wherever the white pine is found, viz.; from New Brunswick and Canada west to Minnesota, and south to North Carolina. It also attacks our other native pines and the spruces somewhat.

The adults pass the winter in protected places, possibly in the ground, and in spring gather on the terminal shoots (leaders) of the pines, generally on the trunk leader in preference to those of the branches. Here, near the tip, they feed on the bark and soon cut tiny holes in it, placing their eggs in the holes. The borers which hatch from these eggs tunnel downward through the leader and by August have finished feeding and pupate in the tunnels. After transformation to the beetle has been completed, these escape to the outside by making round holes through the stems they are in.

Later they hibernate for the winter. The adult beetle is about a quarter of an inch long, reddish brown or somewhat darker, with a white spot on each elytron not far from its outer end, which when the elytra are closed brings these spots not far from the end of the body. There are also several irregular areas on the elytra somewhat lighter than the ground color.