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Emerald Ash Borer Management Plan
 The Emerald Ash Borer or EAB is a metallic green beetle native to Asia, it is about 1/2 inch long and 1/8 inch wide. In its larval stage it feeds under the bark of an ash tree. The feeding creates channels that cut off water and nutrient movement in the tree. Infested trees gradually die over a 2 - 4 year period.

EAB was found in Wisconsin in August of 2008 near the community of Newburg near West Bend. As of May 2013 it has been confirmed in 15 counties including Rock.

Monroe is preparing for the impact of EAB. In 2013 an Emerald Ash Borer Management Plan was completed. An important part of the plan was completing an inventory of the location and number of ash trees on city terraces. It was determined we have 603 terrace ash trees along with 73 ash trees in city parks. In 2014, we will plan to start removing ash trees that are structurally unsound and in poor condition along with ash trees that are improperly placed and are interfering with other infrastructures such as blocking stop signs or under power lines. In addition to these preemptive removals , chemical treatment of the best mature ash trees located on terraces and in parks will start in 2014.

Signs and symptoms of EAB:
  • Die back of tree canopy
  • Suckers or new growth will sprout from the trunk
  • Woodpeckers consume EAB larvae and as a result significant damage may be seen on the bark of the trunk.
  • When EAB adults exit the ash tree they produce D shaped exit holes.

If you notice D shaped exit holes in your ash tree or 2 or more other symptoms or signs of EAB, please report your findings to the Park Director / City Forester at 329-2469.

Emerald Ash Borer Management Plan

Emerald Ash Borer Information Brochure

City of Monroe Ash Tree Inventory