The 20+” Ash (Fraxinus spp.) tree at the Wildlife Preserve here at the Historic Shupe Homestead has been treated for a second time in two years, on schedule (June 2014), in order to protect it from the invasive Emerald Ash Borer, which has been literally decimating native Ash trees throughout the United States. The borer, introduced in 2002, quickly spread across the country. The Emerald Ash Borer attacks the cambium layer of Ash trees, interrupting the flow of water and nutrients up and down the tree from the crown of leaves and roots and back and forth. The unseasonably cold winter we had (2013-2014) devastated a portion of the Ash borer population, which has given a reprieve to some Ash trees.
The Ash tree we treated here has a nice, full crown, and we continue to maintain this specimen. Note the dead Ash tree (untreated) on the left, behind the treated specimen.