Study fails to show that trees are harmed by drill hole injections

A study by Joseph J. Doccola, David R. Smitley, Terrance W. Davis, John J. Aiken, and Peter M. Wild, published in the January edition of the Journal of Arboriculture and Urban Forestry, failed to show negative effects to trees from drill hole injections such as the Arborjet injections used for Emerald Ash Borer.  Many have been concerned about this approach due to the potential for negative effects to the trees.  This study did not show any lasting negative effects.  Of course it must be noted that, for ash in particular, failure to treat will inevitably result in the death of the tree due to Emerald Ash Borer