How trees ward off disease, injury, and decay Posted on November 4, 2018 by LLD 0 A helpful primer from the late father of modern arboriculture, Alex Shigo, chief scientist U.S. Forest Service informs us of how trees ward off disease, injury and decay: Trees fighting back Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Related