Leptographium terebrantis and Black Turpentine Beetles Associated with Blue Stain and Mortality of Black and Scots Pines on Cape Cod, Massachusetts. Lorraine Highley, Former Research Assistant, Shade Tree Laboratories, Department of Plant Pathology, University of Massachusetts, Amherst 01003. Terry A. Tattar, Professor, Shade Tree Laboratories, Department of Plant Pathology, University of Massachusetts, Amherst 01003. Plant Dis. 69:528-530. Accepted for publication 2 January 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-528.

Mortality of Japanese black (Pinus thunbergiana) and Scots (P. sylvestris) pines on Cape Cod, Massachusetts, followed attack by the black turpentine beetle (Dendroctonus terebrans) and the staining fungus Leptographium terebrantis. Blue stain caused by L. terebrantis developed beneath larval galleries of the beetle in the lower bole and buttress roots and was followed by foliar symptoms and attack by bark beetles (Ips sp.) and other staining fungi.