Our biggest threat from insects is almost entirely attributed to introduced species. Most of our common pest species are not native to North America.

Emerald Ash Borers Our biggest threat from insects is almost entirely attributed to introduced species. Most of our common pest species are not native to North America. The latest introduced species to wreak its havoc on our landscape is the Emerald Ash Borer. This small green beetle is destroying ash trees across Southeast Michigan. While only ash trees are affected, treatment must be left to a qualified arborist (tree expert). You can find an arborist on-line at http://www.natlarb.com . If you have ash trees that exhibit top-down die-back, have 2-4" vertical slits in the bark, or D-=shaped emergence holes, you may want to contact the Emerald Ash Borer Hotline at 1-866-325-0023 or go on-line to http://www.emeraldashborer.info.