Cylindrocladium Root Rots of Sweetgum Seedlings in Southern Forest Tree Nurseries. E. G. Kuhlman, Research Plant Pathologist, USDA Forest Service, Southeastern Forest Experiment Station, Research Triangle Park, NC 27709. C. E. Cordell, Nursery Disease Specialist, Forest Insect and Disease Management, Southeastern Area, State and Private Forestry, Asheville, NC 28803; and T. H. Filer, Jr., Research Plant Pathologist, USDA Forest Service, Southern Forest Experiment Station, Stoneville, MS 38776. Plant Dis. 64:1079-1080. 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, 1980. DOI: 10.1094/PD-64-1079.

Sweetgum seedlings have been killed or stunted by Calonectria crotalariae, Calonectria kyotensis, and Cylindrocladium scoparium in North Carolina, South Carolina, and Mississippi forest nurseries. In one affected seedbed, 24% of 2,400 seedlings had root rot symptoms. This first report of Calonectria crotalariae damage in forest tree nurseries includes new host records for all three fungal species.

Keyword(s): basal stem canker, Cylindrocladium floridanum, homothallic, Liquidambar styraciflua.