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Emerald Ash Borer

The emerald ash borer is one of the most threatening insect pests that faces United States forests. These insects are wood-boring pests that infest ash trees. They have the potential to eliminate ash tree populations in the United States. Bullet-shaped adults are metallic green and have strong wings. Adults feed on leaves, but do not cause much harm. It is the larva that is most detrimental. Adult females lay about 100 eggs on tree trunks and larger branches during their two-month life. When the larvae hatch, they bore through the inside of the tree. This prevents movement of nutrients within the tree. The result of an emerald ash borer infestation is death to the ash tree. These insects are not native to the United States. It is thought that emerald ash borers were brought from Asia on wooden cargo crates by accident. There are ways you can help control the spread of emerald ash borers. Do not move firewood to other regions or neighborhoods.

Photo from Leah Bauer, USDA Forest Service Northern Research Station, Bugwood.org: Adult emerald ash borer Photo from Steven Katovich, USDA Forest Service, Bugwood.org: emerald ash borer grub Photo from Steven Katovich, USDA Forest Service, Bugwood.org: emerald ash borer tree damage