Emerald Ash Bore
I have seem a sick Ash Tree in Ames. It is in front of the Ames Tribune newspaper office at 317 Fifth Street in Ames. I wondered if it was infected with Emerald Ash Bore?
Story County Iowa
I checked the ash tree in front of the Ames Tribune earlier today and spoke with a couple of employees. The tree is in deep trouble and serious decline, but not because of emerald ash borer. The tree has large portions of the trunk where the wood under the bark is dead. These are areas on the south and east sides where woodpeckers have flecked off the thick bark and drilled holes into the wood to eat the roundheaded borers in the dead portions of the tree. See the "Probables" pamphlet below.
The dead portions correspond to what appears to be long-ago injury or interruption to the base of the tree. The trunk is concave and dead on the south side, and flat on the east side - indications of injury or underground trouble from long ago. The tree stopped growing in those areas and subsequently died.
The tree may remain functional for a few more years but as it dies it becomes a liability and will need to be removed in the not-too-distant future.
In that small space a smaller tree would fit nicely. Here is a list of recommended small trees: http://www.extension.iastate.edu/psep/Publications/EAB/AshAlternateSmall-staturetrees2013.pdf The author is Dr. Jeff Iles from the Horticulture Department (firstname.lastname@example.org).
I'll drive by and take a look on my way home later today.
There are lots of reasons for ash trees to decline. It could be anything from old age to improper planting to mechanical injury. https://store.extension.iastate.edu/Product/Common-Problems-of-Ash-Trees
There are specific symptoms of Emerald Ash Borer infestation. I'll see if any are present and let you know. https://store.extension.iastate.edu/Product/Looking-for-the-Emerald-Ash-Borer-in-Iowa
Donald Lewis 515-294-1102