Ash Borer explained.
Darron:
Basically, Emerald Ash Borers were an inported pest that have been traced back to shipping crates coming in on ships from (where else) China. It's a beetle that bores a "D" shaped hole in the bark of an Ash tree, deposits it's eggs and goes elsewhere. The eggs hatch and the little ones feed off the layer under the bark of the Ash tree where the sap or whatever flows and their 'mining' in that layer effectively kills the tree. Ash trsse are dying by literally the thousands around these parts and Ash trees are the main shade tree that replaced the Elm over 30 years ago when Dutch Elm diesase wiped them out.
There are actually quarantine areas (I live in one of them) where it's a crime to transport ash wood from one area to another for any use. Interestingly, Amy and I have 3 large, healthy Ash trees on the property that we have religiously treated with the only scientifically know deterrent to the Ash Borer. I don't know the chemical name but it's produced by the Bayer Chemical Company (aka Bayer Asprin), costs 25 bucks for a quart bottle and has to be mixed with water and poured around the base of the tree every spring. It smells like latex paint and looks like a vanilla milkshake and seems to work. The Monroe County Extension Agent lives about 2 miles from the farm and monitors our 3 trees very closely. I believe the Michigan Department of Agriculture is doing a case study on them though we've never been told one way or another.
I'd like to keep them alive and pest free untill either the borer dies out or all the other trees are dead around us (which isn't going to be much longer). Our Ash trees provide shade for the farmhouse. Besides, they are very stately trees.
I believe every region of the country has pest problems unique to that area. At least Ash Borers don't bite though the Chinese ladybugs that are here now do pinch. That's another story.