Previous View
APSnet Home
Plant Disease Home



Occurrence of Air Pollution Symptoms (Needle Tip Necrosis and Chlorotic Mottling) on Eastern White Pine in the Southern Appalachian Mountains. Robert L. Anderson, Plant Pathologists, USDA Forest Service, Region 8, Atlanta, GA. H. Daniel Brown, Boris I. Chevone, and Thomas C. McCartney. Plant Pathologists, USDA Forest Service, Region 8, Atlanta, GA; Plant Pathologist, Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg; and Biological Technician, USDA Forest Service, Region 8, Asheville, NC. Plant Dis. 72:130-132. Accepted for publication 25 August 1987. 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, 1988. DOI: 10.1094/PD-72-0130.

The air pollution symptoms tip burn and chlorotic mottling were found on eastern white pine in about 23% of sampled stands in the southern range of this species in Virginia, North and South Carolina, Georgia, Tennessee, and Kentucky. Plantations had a higher percentage of trees affected than did natural stands. The percentage of stands with at least one symptomatic tree was highest in Kentucky (77%), followed by Tennessee (31%), and lowest in Georgia (10%). Elevation and percent slope were not correlated with incidence, but stands with symptomatic trees were most common on southwest aspects. Symptomatic trees had 49% less mean volume than healthy trees.