Risk Prediction of Loblolly Pine Decline on Littleleaf Disease Sites in South Carolina. S. W. Oak, Plant Pathologist, USDA Forest Service, Southern Region, Forest Pest Management, Asheville, NC 28804. F. H. Tainter, Professor, Department of Forestry, Clemson University, Clemson, SC 29634-1003. Plant Dis. 72:289-293. Accepted for publication 8 October 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-72-0289.

Three crown health classes in loblolly pine were identified and compared among three different littleleaf risk classes predicted by two methods, a point system and a soil series system. As determined by the point system, incidence of crown symptoms was 15% on high-risk sites, 13% on intermediate-risk sites, and 1% on low-risk sites. As determined by the soil series system, incidence of crown symptoms was higher on intermediate-risk (22%) and high-risk (8%) sites than on low-risk sites (5%).