Relatively new to North America, the Emerald Ash Borer is believed to have been accidentally introduced in 2002 inside wood packing material imported from eastern Asia (MNR, 2010). The beetle has spread mostly through the human movement of infested materials such as dead ash logs, firewood and nursery stock from infested areas (Canadian Food Inspection Agency [CFIA], 2012) as well as through flight. Left unchecked, this highly invasive beetle has the potential to kill most of the 7.5 billion ash trees throughout North America (Golowenski, 2012).
An adult beetle is metallic green in colour and is 8.5 to 14.0 millimetres long and 3.1 to 3.4 millimetres wide. The eggs are approximately one millimetre long and 0.6 millimetre in diameter (MNR, 2010). When hatched, the larvae bore through the bark and feed on the phloem and outer layer of new sapwood (MNR, 2010) where they remain and engage their developmental stages up to and including the adult stage.
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