Distribution of Dieback Associated with Thielaviopsis Black Root Rot of Japanese Holly. R. C. Lambe, Department of Plant Pathology and Physiology, Virginia Polytechnic Institute and State University, Blacksburg 24061. W. H. Wills, Department of Plant Pathology and Physiology, Virginia Polytechnic Institute and State University, Blacksburg 24061. Plant Dis. 64:956. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-956.

Thielaviopsis basicola has been isolated from the roots of Japanese holly growing in containers in four plant nurseries and from numerous landscape plantings of Japanese holly in 12 counties and cities in Virginia and has been reported from four other states. Isolates of T. basicola were cultured from Virginia landscape plantings showing top chlorosis, stunting, and dieback.