Fireblight, what the heck causes that?
Also, first I've seen of those trees, is that tree growing OK, like is that their form, looks like a bunch of antennas sticking out the top????
Our Aussie mountain ash, have a read of this thread and check out the pics. An eye opener for you guys.
Eucs were tallest trees in the world, big wood Aussie logging, world's tallest trees