Emerald ash borers were in U.S. long before first detection

The uber-destructive emerald ash borer arrived at least 10 years before it was first identified in North America, new research confirms. shows that EABs were feasting on ash trees in southeast Michigan by the early 1990s, well before this pest was discovered in 2002, arriving inside wood crating or pallets imported from Asia where the beetle is native.

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