Twolined Chestnut Borer

摘要

The twolined chestnut borer (TCB), (Agr/Vus bilineatus), is a boring beetle. Like the bronze birch borer and the emerald ash borer it is a bupestrid beetle, also commonly known as a metallic wood boring beetle, or "flat head" borer. The TCB gets its name from its distinctive markings and for one of its historically preferred hosts, American chestnut. The adult beetle is approximately 1/4 to 1/2 inch in length, dark brown/black in color, with its namesake two gold colored lines running down the back.The larva reaches about 1 inch in length when mature and looks like a thin, white, segmented worm. One characteristic distinguishing TCB larva from other flat head borer larva is the two pincer-like spines that protrude from the abdomen or hind end of the larva.