A Technical Report from The Bartlett Tree Research Laboratories

Emerald ash borer was first discovered in southeastern Michigan in 2002. Accidentally introduced on solid wood packing material from Asia, EAB has since spread to nearly all states within the native North American range of its preferred tree host, ash. Further range extension is anticipated. Hundreds of millions of native ash trees, all species of which are susceptible, have succumbed to the feeding of the immature stage of this small, green beetle. Trees often die within one-to-three years following initial attacks. Economic and social costs due to this invasive species are historically significant.

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