Emerald Ash Borer (Agrilus planipennis Fairmaire)
is an exotic beetle discovered near Detroit, Michigan in the summer of 2002. The adult beetle causes little damage aside from minor leaf feeding. It is the immature stage (larva) that does the real damage. Larvae feed on the inner bark of the Ash trees preventing water and nutrients to move through the tree resulting in its death. It is believed that the insect arrived on solid wood packing material originating in its native Asia.
It was discovered with an established population in Detroit and Windsor.

Since its discovery, EAB has killed tens of millions of trees in the infected states. This has caused regulatory agencies and the USDA to enact quarantines to try to prevent potentially infested Ash trees, logs, or hardwood firewood from moving out of where EAB occurs. This action, which is necessary to slow the spread of this beetle, along with the removal of the dead and dying trees is costing municipalities, property owners, nursery operatives, and forest product industries tens of millions of dollars. When an Ash tree is killed from EAB the tree quickly becomes brittle and dangerous necessitating its immediate removal when it is in a risk location. All street trees are in risk locations.

What has happened in other states?
What we have learned from other states is that EAB kills trees quickly. Streets are suddenly lined with dozens to thousands of dead and dying trees at risk of causing personal injury and property damage.
Communities and their residents have spent millions of dollars to remove and replace their trees or treat them. It has overwhelmed local governments and private property owner’s budgets. The public and commercial capacity has been inundated in tree removal, handling the wood, and planting new trees.
• An increase in fraud, substandard work, non-ash tree removal, damage and injuries from unqualified or incapable fly-by-night operators is occurring.
• An increase in storm water runoff is taking place
• An increase in energy use and cost in heating and cooling is resulting from the loss shade.
• Water use has increased on landscapes from the loss of shade
• An increase in power outages from dead ash trees falling on power lines is occurring
• Air quality is being reduced from the loss of a trees ability to filter pollution and cool the air.
(Cited from: The Wisconsin Emerald Ash Borer Program is a cooperative effort between the Wisconsin Department of Agriculture, Trade and Consumer Protection, the Wisconsin Department of Natural Resources, the University of Wisconsin-Madison, the University of Wisconsin-Extension, the United States Department of Agriculture-Forest Service and the United States Department of Agriculture –Animal and Plant Health Inspection Service – Plant Pest Quarantine v. 8/03/2010)

Identifying EAB
The Emerald Ash Borer ( EAB) attacks green, white, black, and blue ash trees. This includes all native Ash cultivars of the genus Fraxinus. Mountain Ash and Prickly Ash are not true ash, or Fraxinus, species so are not affected by EAB. True Ash trees have their branches located opposite each other. Keep in mind that every branch might not have an opposite bud or branch if one has died. Only Ash and Maples have opposite branching.

Signs and Symptoms
It is important to look for a combination of at least two of these symptoms.

Life Cycle
The beetle can develop from egg to adult in as little as one year. From June to July, adults exit the tree from under the bark to mate and feed on Ash leaves. Females lay at least 60-90 eggs in bark crevices and the eggs develop into worm like larvae, which chew through the bark to feed and grow throughout the fall. This activity eventually kills the tree.
The larvae lay dormant during the winter and exit from the tree in late June to early July as adults, leaving a unique “D” shaped exit hole. They usually live about three weeks as an adult.

Other Information
-An Ash without EAB is easier and more affordable to treat than a tree that is infected.
-Treatments will need to be ongoing to prevent EAB infestation.
-We offer treatments to help protect your Ash trees.
- Additional information: www.emeraldashborer.info