Butternut trees vanish in Iowa forests

A butternut tree. Photo by Bruce Marlins, Flickr

Another tree is vanishing from Iowa’s landscape.

Since 1990, some 94 percent of the state’s 1.4 million butternut trees have been wiped away by butternut canker, an untreatable disease caused by a fungus, according to a DNR release.

Thus fungus, Sirococcus clavigignenti-juglandacearum, is spread by rain splash, wind and insects. It produces thick, black columns that blisters bark and splits it open. Continue reading