Dieback of leaves that begins in the upper third of the tree and progresses downward over time.
(J. Ellis, Purdue University) |
Vertical splits in the tree's bark.
(C. Sadof, Purdue University)
|
D-shaped exit holes that are only 1/8 inch wide found in the tree’s bark on the limbs and trunk, the result of the emergence of newly formed adults.
(J. Ellis, Purdue University) |
S-shaped channels found under the tree’s bark caused by larval feeding.
(J. Ellis, Purdue University)
|