We saw some dieback in trees coming out of winter. In some cases, it is environmental stress from drought stress and winter ...

Dozens of species of fungi cause canker disease. Cankers are caused by a number ... the tree may begin to compartmentalize off the area by sealing wood cells off around the canker.

Butternut trees are dying across the northeastern U.S. and southeastern Canada. A fungus is killing the big trees much like Dutch elm disease... Jul 06, 2010 — Butternut trees are dying across ...

trees are very susceptible to a fungal disease known as butternut canker, a pathogen considered to be "exotic," though no one knows where it came from. The disease, whose spores are spread by wind ...

Douglass Jacobs, the Fred M. van Eck Professor of Forest Biology at Purdue University, with a butternut tree that has been infected with stem canker. Butternut is on the list of at-risk forest ...

CEDAR RAPIDS, Iowa (AP) — The hope of saving butternut trees in Iowa rests with the trees that appear to be healing from a fungal disease that ... The butternut canker fungus has been deadly ...