Armillaria Root Rot: The Puzzle Is Being Solved. Philip M. Wargo, USDA Forest Service, Center for Biological Control of Northeastern Forest Insects and Diseases, Hamden, CT. Charles G. Shaw III, USDA Forest Service, Forestry Sciences Laboratory, Juneau, AK. Plant Dis. 69:826. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1985. DOI: 10.1094/PD-69-826.