[GOPJ]

The answer’s in the past...dutch elm disease...

from link:

http://www.dailymail.co.uk/sciencetech/article-1284637/The-Dutch-Elm-Disease-destroyer-Man-breeds-tree-resistant-deadly-blight.html

As it swept through the British countryside, Dutch elm disease wiped out 25million trees.

But among the few survivors was a specimen discovered 33 years ago by horticulturist Paul King, who decided to take some cuttings.

And now, after years of painstaking research, he has developed a tree resistant to the infection.

[Chickensoup]

boy it would be nice to see streets lined with elms again. I remember them from my youth.

[tumblindice]

For some reason the Chinese hybrid elm is resistant to the Dutch elm blight.