The emerald ash borer (Agrilus planipennis) is a beetle responsible for the deaths of hundreds of millions of ash trees in the U.S. and Canada. It is native to East Asia, including China, Russia, Mongolia, Taiwan, Japan, and Korea. The insect was introduced to North America in wooden shipping materials in the 1990s. It is considered to be among the most destructive invasive species in North America, where it has dramatically altered forests and urban tree canopies. In 2026 it was detected in the European Union for the first time.
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