Researchers developing disease-resistant American elms; Twin Cities, MN

MPR: Researchers developing disease-resistant American elms
by Dan Gunderson, Minnesota Public Radio
June 16, 2009
Fargo, N.D.. — Minnesota could lose millions of ash trees to the emerald ash borer.
Forty-five years ago, disease struck another immensely popular tree, the American elm. Towering elms that shaded many streets were destroyed by Dutch elm disease.
The American elm is making a slow comeback.