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Wisconsin Ash Tree Mortality

Posted: August 2, 2017

Written by: Ron Gumz, Certified Arborist MN-0324A

Categories: Emerald Ash Borer | Insect Control

Many of you may be aware of emerald ash borer at this point and the implications of this insect.  The media and others have done a good job of raising our awareness.  In the summer of 2008, emerald ash borer was positively identified in Wisconsin for the first time.  By the time the insect was noticed in Newburg, the consensus was that it had been in the area for several years already based on the extent of the ash tree damage.  Now fast forward, and we see Emerald Ash Borers affecting thousands ash trees in the communities around us.

Dr. Dan Herms of Ohio State University and others have done studies on ash mortality as EAB moved through parts of Michigan and Ohio.  His Ash Mortality Curve was partially developed using dendrochronology which is the study of the annual growth rings in trees, especially as a way of dating pest infestations or determining past climatic conditions.  This data shows a steep incline of the death rate of ash trees as the borer overwhelms an area.  Ultimately, the graph tells us that after EAB has been in an area for a specific time period, the number of dead ash trees climbs exponentially.

If you have not prepared already, the time to deal with emerald ash borer has been upon us for years.  Yet, there are still too many ash trees are going untreated. If you have a thriving ash tree, the time to protect it is now. Planting new, diverse species of trees is an option when considering your possibilities for your landscape.  If you have been on the fence about what you would like to do about your ash trees, please get in touch with your Wachtel Tree Science Certified Arborist to develop an action plan.

Contact our Certified Arborists today for more information on how you can protect your Ash trees with effective EAB treatment options.

2019-07-30T09:17:22+00:00 August 2nd, 2017|