The announcement that the invasive pest Emerald Ash Borer (EAB) is present in NJ will lead to many discussions between professionals and concerned clients on what to do about their ash trees. EAB represents a broad threat – it attacks all true ash (Fraxinus) species. In the U.S., trees die within a few years without treatment. Research out of Ohio by Dan Herms points to the need for long term control efforts – possibly 15 to 20 years. Feasibility of treatment on an individual basis balances the cost of effective treatment vs the cost of removal of trees killed by EAB – which is not small.
Landscape Options for EAB
Confusion arises when discussing management of ash tree populations (forest or landscape) at risk due to EAB. Any discussion involving treatment does not apply to whole forests because methods and treatment costs make that impossible. Specific options available to landscaped areas include: elimination, preservation, and conservation.
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| June 2006 Urban Ash Trees Pre-EAB |
August 2009 Urban Ash Trees Post-EAB |
| Photos by D. Herms, Ohio State University | |
