How did the walnut twig beetle get to Boulder/CO?
The walnut twig beetle (Pityophthorus juglandis) is native to the southwest United States (California, Arizona, and New Mexico) and northern Mexico. The beetle either moved northward naturally, or was transported to the area in firewood. In any case, the beetle unfortunately appears here to stay. Even if we are able to reduce beetle populations through swift and proper removal of diseased trees and wood, total eradication is not likely.
