Damaging agents can also be aphids, stem borers, and fruit flies. It has to be treated to prevent fungi, wood borers and termites from eating it. Larvae of this family are known as flatheaded borers. Also attractive to users is the resistance to insects, bacteria, fungi and marine borers. California root borers are considered an orchard pest. The heartwood is extremely durable and resists marine borers. In early spring, sergeant thrushes consume corn borers (Ostrinia nubilalis) in fields with corn stubble. When a tree is stressed, bronze birch borers may kill the tree. Other stone tools included burins, end-scrapers and borers. Both male and female European corn borers produce sex pheromones. Assuming damage caused by Borers taking advantage of weakened tree. Bone instruments are quite varied&colon; spear-points, harpoon-heads, borers, hooks and needles. It is being protected from the borers with horticultural treatment. "Fallout 4" (2015) expands upon this story with another location, Dunwich Borers.