Thank you Song of Joy for your information about the systemic insecticide. This area had an early warning of the infestation before it got here. Our parkway tree was cut down over three years ago and replaced with a crimson maple(name escapes me). They found out too late that it would have been less expensive to treat the parkway trees than to wait until they had to cut them down. There was a nice canopy of trees over most of the neighborhood. Now it looks like it did over 35 years ago when everything was just being built.
My son Nick and I are big tree huggers. He is the one to get the root feeder out for fertilizing and deep root watering of the remaining trees during dry spells.