Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension
www.extension.umn.edu
612-624-1222

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Poplar > Holes in trunk

Print Icon Email Icon Share Icon

Poplar > Trunk/Branches > Holes in trunk

1 of 2
  • Image: Bronze poplar borer 1
  • Image: Bronze poplar borer 2
  • Image: Bronze poplar borer 3

Bronze poplar borer
Agrilus granulatus

  • "D" shaped exit holes present in affected branches
  • Branch die back and death caused by larvae feeding under bark
  • Creates serpentine S-shaped galleries underneath bark
  • Adults have black bodies with a tinge of metallic green; approximately 3/8th inch long
  • Larvae are whitish, slender, 1- 1 ½ inch long with 2 dark brown tail-like structures at the end of the body
  • More information on Bronze poplar borer
2 of 2
  • Image: Poplar borer 1
  • Image: Poplar borer 2
  • Image: Poplar borer 3

Poplar borer
Saperda calcarata

  • Holes in bark filled with stringy sawdust or at base of tree
    below holes
  • Brown stain streak below holes formed by longhorned beetle under bark
  • Fully-grown larvae up to 1 1/2 inch long; creamy-white and legless
  • More information on Poplar borer

Don't see what you're looking for?

© Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer.