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Ecology and Epidemiology

Occurrence of Darluca filum on Cronartium strobilinum and C. fusiforme Infecting Oak. E. G. Kuhlman, Plant Pathologist, U. S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station, Forestry Sciences Laboratory, Research Triangle Park, N. C. 27709; F. R. Matthews, Plant Pathologist, U. S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station, Forestry Sciences Laboratory, Athens, Ga. 30601. Phytopathology 66:1195-1197. Accepted for publication 4 April 1976. Copyright © 1976 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-66-1195.

The mycoparasite Darluca filum commonly was found in uredial sori of Cronartium strobilinum on Quercus minima and Q. pumila in Florida. Isolates of D. filum were inoculated and established on uredia and telia of C. fusiforme present on six oak species in North Carolina. Pycnidia of D. filum often formed within the base of the telia of C. fusiforme.