Twolined chestnut borer
Agrilus bilineatus

• Leaves in upper canopy turn brown and dead branches are present
• Damage visible mid to late summer
• S-shaped galleries beneath bark
• 1/8 inch D-shaped exit holes may be visible
• Adult has bluish black body with two light stripes running down the wing covers
• Larvae are approx. 1 inch long and white with 2 spines at the abdomen tip
• More information on Twolined chestnut borer...