There is no cure unfortunately. There's various chemicals that you could try, but I wouldn't waste the money. They'll never be the same again. If they've had it, dig out and replace with dwarf holly, dwarf Euonymus, Photinia "Little Red Robin", or other short growing evergreen.
Just seen a...
I had a huge cardboard box full of all sorts of Albion stuff, including newspaper cuttings, protest posters, virtually anything to do with Brighton. Having just gone through the "Swedish Death Cleaning" process, I gave everything to my Grandson, aged 10, who is also a Season Ticket holder. I...
I've probably said this before, but I've walked over that viaduct around 1970. The trains had stopped by then! We walked from Kemptown goods yard, through the tunnel, across the viaduct, and turned back when we actually saw trains!!
Park Corner Heath / Rowland Wood Butterfly Reserve this morning.
https://gridreferencefinder.com/#gr=TQ5229016280|East_s_Hoathly|1,TQ5126214866|Point_s_B|1,TQ5254416390|Point_s_C|1
Point "B" on above map.
Pearl-bordered Fritillary.