How ash trees are combating die back video. Up to 85% of Ash trees dieing.
However younger ash showing resistance. Fungus killing off the younger trees which are suseptable, retaining the trees with beneficial combination of genes those have a higher average resistance to the fungus than the adult generation. Natural selection. However evolution may run out of steam. Scientists step in with breeding programs to help trees resistant to Ash die back.
Kaliwood 