Emerald Ash Borer

The Emerald Ash Borer (EAB) is Coming to an Ash Tree Near You - Ash Tree Removal and EAB



Background


The Emerald Ash Borer (EAB) is an invasive beetle from Asia that was discovered in Detroit in 2002 and has since killed tens of millions of Ash trees throughout 25 states in the Eastern United States and Canada. The Emerald Ash Borer (EAB) eats the leaves of ash trees and deposits their eggs beneath the bark. When the larvae hatch, the insects destroy the vascular system of the trees, leading to their eventual death. Unfortunately last year, the Emerald Ash Borer was recently confirmed in two separate locations in Ballwin, as well as St. Charles County, so we expect to see the EAB in Wildwood soon.

Research has shown that when a community is first infested with EAB, tree mortality is relatively low. However, as insect populations build, there is an exponential jump in mortality.  This time frame can be anywhere from several years up to a decade. Therefore, in Wildwood, we expect to see a dramatic increase in the mortality of Ash trees over the next 3-5 years.  Ultimately, the EAB will attack all Ash species, regardless of their health. It is expected that within 10 years all urban Ash trees will be dead.

Emerald Ash Borer Preparedness


Wildwood has performed a street tree inventory and it was found that about 450 of our street trees are Ash and thus are susceptible to EAB. Unfortunately the distribution of Ash trees is not uniform throughout the City. Some neighborhoods and streets have a much higher concentration of Ash trees. 

Removal


Ash trees that are killed by EAB will quickly become brittle and fall apart, creating potential hazards to public safety.  As Ash trees on public streets decline, the Department of Public Works will have the trees removed by private contractors.  The removal of Ash tree will be prioritized and scheduled based on condition, size, and threat.  If you notice a declining Ash tree in City right-of-way adjacent to your home, that you would like to be considered for removal, please call us at 636-458-0440.

Treatment


Chemical treatments are available to temporarily fend off EAB damage to trees.  These treatments, which are estimated to cost about $200 per application for a mature tree, typically provide protection from EAB for up to two years, and must be re-applied biennially.  While such treatments may be desirable for private owners of ash trees, they are not a realistic option (financially or logistically) for City maintained street trees, as there is no guarantee the treatment will be successful, and many of our ash trees are near the end of their life expectancy.

Urban Forestry Consortium


Under the Urban Forestry Consortium (UFC), Wildwood has utilized a cooperative bidding process with other municipalities for the removal or treatment of Ash street trees. By utilizing this cooperative approach, the City of Wildwood was able to obtain competitive bids, at the lowest cost for tree removal and treatment services.  The UFC recently completed the bidding process and has selected two contractors.  Omni Tree Service Inc. was the low bidder selected to complete Ash tree removals and stump grinding.  For Ash tree treatment, Timberline Professional Tree Care, LLC was the low bidder.  Timberline is proposing to treat trees with TREEage (Emamectin Benzoate). 

To assist Wildwood residents, Omni has agreed to provide a 10% discount on tree removals to all homeowners.  Timberline has agreed to extend their municipal pricing to Wildwood residents with a $75.00 surcharge per household. Please contact the Department of Public Works for more information.

Grants


Finally, the City will also take advantage of grants when available.  For example, the City of Wildwood was recently awarded a Missouri Department of Conservation $10,000 TRIM Grant for the removal of declining Ash trees on several City streets.  The TRIM grant, which stands for Tree Resource Improvement and Maintenance, will cover the removal of 56 declining Ash trees and replacement with a diverse mix of trees. 

Unfortunately, the scope and impact of the EAB infestation will be significant, and the resultant loss of ash trees will have a visual impact within many of our neighborhoods and streets over the coming years.  For the latest information, please check the City of Wildwood website.  More information about the EAB can be found at the links below:

http://www.emeraldAshborer.info/

http://mdc.mo.gov/your-property/your-trees-and-woods/tree-diseases-and-pests/emerald-Ash-borer-management

http://extension.missouri.edu/treepests/emeraldAshborer.aspx