Susceptibility of Longleaf Pine Seedlings to Cronartium quercuum f. sp. fusiforme in Greenhouse Tests. R. L. Anderson, Manager, Resistance Screening Center, USDA Forest Service, Asheville, NC 28804. C. H. Walkinshaw, Principal Plant Pathologist, USDA Forest Service, Southern Forest Experiment Station, Gulfport, MS 39503. Plant Dis. 70:50-51. Accepted for publication 17 June 1985. 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, 1986. DOI: 10.1094/PD-70-50.

Seedlings from families of 13 wind-pollinated longleaf (Pinus palustris), 2 loblolly (P. taeda), and 2 slash (P. elliottii var. elliottii) pines were inoculated with basidiospores of Cronartium quercuum f. sp. fusiforme. Inoculum was derived from galls on 30 naturally infected longleaf pines. Incidence of infection in families of longleaf pine seedlings ranged from 16 to 38% compared with 33 to 86% for families of slash and loblolly pines. Screening longleaf pine families by inoculation of seedlings with basidiospores appears feasible.