Root Rot of Japanese Umbrella Pine, Sciadopitys verticillata, Caused by Phytophthora cinnamomi. R. C. Lambe, Associate Professor, Department of Plant Pathology and Physiology, College of Agriculture and Life Sciences, Virginia Agricultural Experiment Station, Virginia Polytechnic Institute and State University, Blacksburg 24061. W. H. Wills, Professor, Department of Plant Pathology and Physiology, College of Agriculture and Life Sciences, Virginia Agricultural Experiment Station, Virginia Polytechnic Institute and State University, Blacksburg 24061. Plant Dis. 67:698. Accepted for publication 22 January 1983. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-698.

Japanese umbrella pine was found for the first time to have a severe root rot and wilt disease caused by Phytophthora cinnamomi in container-grown nursery plants. Seedlings artificially inoculated with P. cinnamomi from umbrella pine developed root rot and wilt and the pathogen was recovered from the symptomatic plants.