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Compartmentalization of Decay Associated with Fomes annosus in Trunks of Pinus resinosa. Alex L. Shigo, Chief Plant Pathologist, Northeastern Forest Experiment Station, Forest Service, U.S. Department of Agriculture, Durham, New Hampshire 03824; Phytopathology 65:1038-1039. DOI: 10.1094/Phyto-65-1038.

Decay associated with Fomes annosus in 26 Pinus resinosa trees was compartmentalized in the trunks. The decay was confined to the wood present in the trunk at the time the fungus grew from the root into the root collar. The new wood that continued to form in the trunk was not infected. The healthy wood was associated with vigorous lateral roots.

Additional keywords: decay in living trees, tree root rots.