Chestnuts disappearing

Last week I picked up some chestnuts in Frankfurt and gave them to Feibai. She put them on the window as a winter feed for her squirrels, but she did no t know a thing about what she had in her hands. The Miniermoth is bringing down the trees since they first were identified in Macedonia in 1989. The photos below, are moth infections seen in Breda (Netherlands) in fall 2017. Given that these belong to the most majestic trees in European parks and forests, I feel sorrow about their decay. Biologist seem helpless. Hope that somebody can stop this.