The Country's Most Dangerous Beetles

Invasive beetles of various colors and sizes have infiltrated U.S. forests, despite efforts by government experts

(Scott Bauer / USDA)

Emerald ash borer (Agrilus planipennis)

Emerald ash borer
(Maura McCarthy)

Native to: Eastern Russia, northern China, Korea and Japan
Attacks: Ash trees of the Fraxinus genus
First discovered in the United States: Near Detroit, Michigan in summer 2002
Currently found in: Michigan, Illinois, Indiana, Ohio, Maryland, Pennsylvania, West Virginia, Wisconsin, Missouri, Virginia, Minnesota, New York and Ontario, Canada Strange symptom of infection: Increased damage by woodpeckers that eat the insect larvae

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