Hi Plantania. The Emerald Ash Borer has proven to be a ferocious enemy in some areas of the country. We are under a quarantine for the EAB here. They say that if there is an infested tree within 15 miles, you can consider your ash trees to be infested as well. Ugh. The treatments work under the right conditions, but the issue can definitely be reinfestation. If you have lost that many trees in your neighborhood, it makes me wonder if it's just a matter of time. However, experts are saying that this wicked freezing weather may help to reduce or completely eliminate the EAB in some locations. I hope so. There is a systemic insecticide that's available in stores should you want to try to treat the tree yourself. It's absorbed by the roots so doesn't require spraying. There are definitely a number of considerations when trying to save a tree from EAB.
http://www.emeraldashborer.inf...