The ash borer was identified in July of 2009. Since then it has been found in most communities in the 6 counties affected, including Auburn Hills. The Emerald Ash Borer emerges from eggs laid on the bark of ash trees. They then bore into the tree where they consume living tree tissue. If damage becomes severe enough tree death will occur. Signs of infestation range from splitting bark caused from tunneling larvae to D-shaped exit holes which are caused by the exiting beetle. Some more serious symptoms include upper tree die-back, and brushy new growth on lower sections of the trunk.
Experts have been trying all the traditional control methods with little success. Considering this, The City of Auburn Hills strategy to combat the beetle starts with an inspection of City-owned ash trees throughout the City. If a tree shows signs of large numbers of beetles it will be removed to reduce overall numbers of larvae before they emerge and become mobile. Trees with lower numbers of larvae will be monitored for future consideration. Some special-case trees will be injected with an insecticide and monitored for results. All ash trees and ash wood removed by city crews will be chipped or ground up which is believed to kill any larvae inside and prevent further spread of the beetle. Residents should follow the same guidelines and not store or transport any ash wood products.
The City of Auburn Hills intends to evaluate all future information to determine if our resources are best used fighting this pest or purchasing replacement of City trees.
To see counties affected by the quarantine in Michigan: www.michigan.gov/.../mda_EAB_Quarantine_Map_195028_7.pdf
Additional information on the Emerald Ash Borer can be found on the following website:
Michigan State University:
Michigan Department of Agriculture: http://www.michigan.gov/mda/0,1607,7-125-1568_2390_18298---,00.html
USDA Forest Service: