I found them on my property too - I have about 4-500 chestnuts from 1-7 years old. Had three trees infested and burned them to the ground where they stood. Sprayed everything else with bifenthrin. I will begin spraying early every spring now. I do not want to lose the whole project.
Lurker on the other site - Glad to be a member here.
Manage/own a 267 acre forest/farm in central Georgia. Mostly wooded with 13 smaller food plots and some smaller orchards (about 40 Dunstans at this point - some about 4 years old now).